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 | * @stat: Statistics for compress algorithm |
31 | * @base: Common crypto API algorithm data structure |
32 | * @calg: Cmonn algorithm data structure shared with acomp |
33 | */ |
34 | struct scomp_alg { |
35 | void *(*alloc_ctx)(struct crypto_scomp *tfm); |
36 | void (*free_ctx)(struct crypto_scomp *tfm, void *ctx); |
37 | int (*compress)(struct crypto_scomp *tfm, const u8 *src, |
38 | unsigned int slen, u8 *dst, unsigned int *dlen, |
39 | void *ctx); |
40 | int (*decompress)(struct crypto_scomp *tfm, const u8 *src, |
41 | unsigned int slen, u8 *dst, unsigned int *dlen, |
42 | void *ctx); |
43 | |
44 | union { |
45 | struct COMP_ALG_COMMON; |
46 | struct comp_alg_common calg; |
47 | }; |
48 | }; |
49 | |
50 | static inline struct scomp_alg *__crypto_scomp_alg(struct crypto_alg *alg) |
51 | { |
52 | return container_of(alg, struct scomp_alg, base); |
53 | } |
54 | |
55 | static inline struct crypto_scomp *__crypto_scomp_tfm(struct crypto_tfm *tfm) |
56 | { |
57 | return container_of(tfm, struct crypto_scomp, base); |
58 | } |
59 | |
60 | static inline struct crypto_tfm *crypto_scomp_tfm(struct crypto_scomp *tfm) |
61 | { |
62 | return &tfm->base; |
63 | } |
64 | |
65 | static inline void crypto_free_scomp(struct crypto_scomp *tfm) |
66 | { |
67 | crypto_destroy_tfm(mem: tfm, tfm: crypto_scomp_tfm(tfm)); |
68 | } |
69 | |
70 | static inline struct scomp_alg *crypto_scomp_alg(struct crypto_scomp *tfm) |
71 | { |
72 | return __crypto_scomp_alg(alg: crypto_scomp_tfm(tfm)->__crt_alg); |
73 | } |
74 | |
75 | static inline void *crypto_scomp_alloc_ctx(struct crypto_scomp *tfm) |
76 | { |
77 | return crypto_scomp_alg(tfm)->alloc_ctx(tfm); |
78 | } |
79 | |
80 | static inline void crypto_scomp_free_ctx(struct crypto_scomp *tfm, |
81 | void *ctx) |
82 | { |
83 | return crypto_scomp_alg(tfm)->free_ctx(tfm, ctx); |
84 | } |
85 | |
86 | static inline int crypto_scomp_compress(struct crypto_scomp *tfm, |
87 | const u8 *src, unsigned int slen, |
88 | u8 *dst, unsigned int *dlen, void *ctx) |
89 | { |
90 | return crypto_scomp_alg(tfm)->compress(tfm, src, slen, dst, dlen, ctx); |
91 | } |
92 | |
93 | static inline int crypto_scomp_decompress(struct crypto_scomp *tfm, |
94 | const u8 *src, unsigned int slen, |
95 | u8 *dst, unsigned int *dlen, |
96 | void *ctx) |
97 | { |
98 | return crypto_scomp_alg(tfm)->decompress(tfm, src, slen, dst, dlen, |
99 | ctx); |
100 | } |
101 | |
102 | /** |
103 | * crypto_register_scomp() -- Register synchronous compression algorithm |
104 | * |
105 | * Function registers an implementation of a synchronous |
106 | * compression algorithm |
107 | * |
108 | * @alg: algorithm definition |
109 | * |
110 | * Return: zero on success; error code in case of error |
111 | */ |
112 | int crypto_register_scomp(struct scomp_alg *alg); |
113 | |
114 | /** |
115 | * crypto_unregister_scomp() -- Unregister synchronous compression algorithm |
116 | * |
117 | * Function unregisters an implementation of a synchronous |
118 | * compression algorithm |
119 | * |
120 | * @alg: algorithm definition |
121 | */ |
122 | void crypto_unregister_scomp(struct scomp_alg *alg); |
123 | |
124 | int crypto_register_scomps(struct scomp_alg *algs, int count); |
125 | void crypto_unregister_scomps(struct scomp_alg *algs, int count); |
126 | |
127 | #endif |
128 | |