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1/* SPDX-License-Identifier: GPL-2.0-or-later */2/*3 * Synchronous Compression operations4 *5 * Copyright 2015 LG Electronics Inc.6 * Copyright (c) 2016, Intel Corporation7 * Author: Giovanni Cabiddu <giovanni.cabiddu@intel.com>8 */9#ifndef _CRYPTO_SCOMP_INT_H10#define _CRYPTO_SCOMP_INT_H11 12#include <crypto/acompress.h>13#include <crypto/algapi.h>14 15#define SCOMP_SCRATCH_SIZE 13107216 17struct acomp_req;18 19struct crypto_scomp {20 struct crypto_tfm base;21};22 23/**24 * struct scomp_alg - synchronous compression algorithm25 *26 * @alloc_ctx: Function allocates algorithm specific context27 * @free_ctx: Function frees context allocated with alloc_ctx28 * @compress: Function performs a compress operation29 * @decompress: Function performs a de-compress operation30 * @base: Common crypto API algorithm data structure31 * @calg: Cmonn algorithm data structure shared with acomp32 */33struct scomp_alg {34 void *(*alloc_ctx)(struct crypto_scomp *tfm);35 void (*free_ctx)(struct crypto_scomp *tfm, void *ctx);36 int (*compress)(struct crypto_scomp *tfm, const u8 *src,37 unsigned int slen, u8 *dst, unsigned int *dlen,38 void *ctx);39 int (*decompress)(struct crypto_scomp *tfm, const u8 *src,40 unsigned int slen, u8 *dst, unsigned int *dlen,41 void *ctx);42 43 union {44 struct COMP_ALG_COMMON;45 struct comp_alg_common calg;46 };47};48 49static inline struct scomp_alg *__crypto_scomp_alg(struct crypto_alg *alg)50{51 return container_of(alg, struct scomp_alg, base);52}53 54static inline struct crypto_scomp *__crypto_scomp_tfm(struct crypto_tfm *tfm)55{56 return container_of(tfm, struct crypto_scomp, base);57}58 59static inline struct crypto_tfm *crypto_scomp_tfm(struct crypto_scomp *tfm)60{61 return &tfm->base;62}63 64static inline void crypto_free_scomp(struct crypto_scomp *tfm)65{66 crypto_destroy_tfm(tfm, crypto_scomp_tfm(tfm));67}68 69static inline struct scomp_alg *crypto_scomp_alg(struct crypto_scomp *tfm)70{71 return __crypto_scomp_alg(crypto_scomp_tfm(tfm)->__crt_alg);72}73 74static inline void *crypto_scomp_alloc_ctx(struct crypto_scomp *tfm)75{76 return crypto_scomp_alg(tfm)->alloc_ctx(tfm);77}78 79static inline void crypto_scomp_free_ctx(struct crypto_scomp *tfm,80 void *ctx)81{82 return crypto_scomp_alg(tfm)->free_ctx(tfm, ctx);83}84 85static inline int crypto_scomp_compress(struct crypto_scomp *tfm,86 const u8 *src, unsigned int slen,87 u8 *dst, unsigned int *dlen, void *ctx)88{89 return crypto_scomp_alg(tfm)->compress(tfm, src, slen, dst, dlen, ctx);90}91 92static inline int crypto_scomp_decompress(struct crypto_scomp *tfm,93 const u8 *src, unsigned int slen,94 u8 *dst, unsigned int *dlen,95 void *ctx)96{97 return crypto_scomp_alg(tfm)->decompress(tfm, src, slen, dst, dlen,98 ctx);99}100 101/**102 * crypto_register_scomp() -- Register synchronous compression algorithm103 *104 * Function registers an implementation of a synchronous105 * compression algorithm106 *107 * @alg: algorithm definition108 *109 * Return: zero on success; error code in case of error110 */111int crypto_register_scomp(struct scomp_alg *alg);112 113/**114 * crypto_unregister_scomp() -- Unregister synchronous compression algorithm115 *116 * Function unregisters an implementation of a synchronous117 * compression algorithm118 *119 * @alg: algorithm definition120 */121void crypto_unregister_scomp(struct scomp_alg *alg);122 123int crypto_register_scomps(struct scomp_alg *algs, int count);124void crypto_unregister_scomps(struct scomp_alg *algs, int count);125 126#endif127