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(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(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