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