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121 lines
3.3 KiB
121 lines
3.3 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* Synchronous Compression operations |
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* |
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* Copyright 2015 LG Electronics Inc. |
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* Copyright (c) 2016, Intel Corporation |
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* Author: Giovanni Cabiddu <[email protected]> |
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*/ |
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#ifndef _CRYPTO_SCOMP_INT_H |
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#define _CRYPTO_SCOMP_INT_H |
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#include <linux/crypto.h> |
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#define SCOMP_SCRATCH_SIZE 131072 |
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struct crypto_scomp { |
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struct crypto_tfm base; |
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}; |
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/** |
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* struct scomp_alg - synchronous compression algorithm |
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* |
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* @alloc_ctx: Function allocates algorithm specific context |
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* @free_ctx: Function frees context allocated with alloc_ctx |
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* @compress: Function performs a compress operation |
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* @decompress: Function performs a de-compress operation |
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* @base: Common crypto API algorithm data structure |
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*/ |
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struct scomp_alg { |
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void *(*alloc_ctx)(struct crypto_scomp *tfm); |
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void (*free_ctx)(struct crypto_scomp *tfm, void *ctx); |
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int (*compress)(struct crypto_scomp *tfm, const u8 *src, |
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unsigned int slen, u8 *dst, unsigned int *dlen, |
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void *ctx); |
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int (*decompress)(struct crypto_scomp *tfm, const u8 *src, |
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unsigned int slen, u8 *dst, unsigned int *dlen, |
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void *ctx); |
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struct crypto_alg base; |
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}; |
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static inline struct scomp_alg *__crypto_scomp_alg(struct crypto_alg *alg) |
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{ |
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return container_of(alg, struct scomp_alg, base); |
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} |
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static inline struct crypto_scomp *__crypto_scomp_tfm(struct crypto_tfm *tfm) |
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{ |
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return container_of(tfm, struct crypto_scomp, base); |
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} |
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static inline struct crypto_tfm *crypto_scomp_tfm(struct crypto_scomp *tfm) |
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{ |
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return &tfm->base; |
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} |
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static inline void crypto_free_scomp(struct crypto_scomp *tfm) |
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{ |
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crypto_destroy_tfm(tfm, crypto_scomp_tfm(tfm)); |
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} |
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static inline struct scomp_alg *crypto_scomp_alg(struct crypto_scomp *tfm) |
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{ |
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return __crypto_scomp_alg(crypto_scomp_tfm(tfm)->__crt_alg); |
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} |
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static inline void *crypto_scomp_alloc_ctx(struct crypto_scomp *tfm) |
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{ |
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return crypto_scomp_alg(tfm)->alloc_ctx(tfm); |
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} |
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static inline void crypto_scomp_free_ctx(struct crypto_scomp *tfm, |
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void *ctx) |
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{ |
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return crypto_scomp_alg(tfm)->free_ctx(tfm, ctx); |
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} |
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static inline int crypto_scomp_compress(struct crypto_scomp *tfm, |
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const u8 *src, unsigned int slen, |
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u8 *dst, unsigned int *dlen, void *ctx) |
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{ |
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return crypto_scomp_alg(tfm)->compress(tfm, src, slen, dst, dlen, ctx); |
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} |
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static inline int crypto_scomp_decompress(struct crypto_scomp *tfm, |
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const u8 *src, unsigned int slen, |
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u8 *dst, unsigned int *dlen, |
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void *ctx) |
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{ |
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return crypto_scomp_alg(tfm)->decompress(tfm, src, slen, dst, dlen, |
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ctx); |
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} |
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int crypto_init_scomp_ops_async(struct crypto_tfm *tfm); |
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struct acomp_req *crypto_acomp_scomp_alloc_ctx(struct acomp_req *req); |
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void crypto_acomp_scomp_free_ctx(struct acomp_req *req); |
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/** |
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* crypto_register_scomp() -- Register synchronous compression algorithm |
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* |
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* Function registers an implementation of a synchronous |
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* compression algorithm |
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* |
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* @alg: algorithm definition |
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* |
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* Return: zero on success; error code in case of error |
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*/ |
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int crypto_register_scomp(struct scomp_alg *alg); |
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/** |
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* crypto_unregister_scomp() -- Unregister synchronous compression algorithm |
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* |
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* Function unregisters an implementation of a synchronous |
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* compression algorithm |
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* |
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* @alg: algorithm definition |
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*/ |
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void crypto_unregister_scomp(struct scomp_alg *alg); |
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int crypto_register_scomps(struct scomp_alg *algs, int count); |
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void crypto_unregister_scomps(struct scomp_alg *algs, int count); |
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#endif
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