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