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