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1/* SPDX-License-Identifier: GPL-2.0-or-later */2/*3 * Asynchronous Compression operations4 *5 * Copyright (c) 2016, Intel Corporation6 * Authors: Weigang Li <weigang.li@intel.com>7 * Giovanni Cabiddu <giovanni.cabiddu@intel.com>8 */9#ifndef _CRYPTO_ACOMP_INT_H10#define _CRYPTO_ACOMP_INT_H11 12#include <crypto/acompress.h>13#include <crypto/algapi.h>14 15/**16 * struct acomp_alg - asynchronous compression algorithm17 *18 * @compress: Function performs a compress operation19 * @decompress: Function performs a de-compress operation20 * @dst_free: Frees destination buffer if allocated inside the algorithm21 * @init: Initialize the cryptographic transformation object.22 * This function is used to initialize the cryptographic23 * transformation object. This function is called only once at24 * the instantiation time, right after the transformation context25 * was allocated. In case the cryptographic hardware has some26 * special requirements which need to be handled by software, this27 * function shall check for the precise requirement of the28 * transformation and put any software fallbacks in place.29 * @exit: Deinitialize the cryptographic transformation object. This is a30 * counterpart to @init, used to remove various changes set in31 * @init.32 *33 * @reqsize: Context size for (de)compression requests34 * @base: Common crypto API algorithm data structure35 * @calg: Cmonn algorithm data structure shared with scomp36 */37struct acomp_alg {38 int (*compress)(struct acomp_req *req);39 int (*decompress)(struct acomp_req *req);40 void (*dst_free)(struct scatterlist *dst);41 int (*init)(struct crypto_acomp *tfm);42 void (*exit)(struct crypto_acomp *tfm);43 44 unsigned int reqsize;45 46 union {47 struct COMP_ALG_COMMON;48 struct comp_alg_common calg;49 };50};51 52/*53 * Transform internal helpers.54 */55static inline void *acomp_request_ctx(struct acomp_req *req)56{57 return req->__ctx;58}59 60static inline void *acomp_tfm_ctx(struct crypto_acomp *tfm)61{62 return tfm->base.__crt_ctx;63}64 65static inline void acomp_request_complete(struct acomp_req *req,66 int err)67{68 crypto_request_complete(&req->base, err);69}70 71static inline struct acomp_req *__acomp_request_alloc_noprof(struct crypto_acomp *tfm)72{73 struct acomp_req *req;74 75 req = kzalloc_noprof(sizeof(*req) + crypto_acomp_reqsize(tfm), GFP_KERNEL);76 if (likely(req))77 acomp_request_set_tfm(req, tfm);78 return req;79}80#define __acomp_request_alloc(...) alloc_hooks(__acomp_request_alloc_noprof(__VA_ARGS__))81 82static inline void __acomp_request_free(struct acomp_req *req)83{84 kfree_sensitive(req);85}86 87/**88 * crypto_register_acomp() -- Register asynchronous compression algorithm89 *90 * Function registers an implementation of an asynchronous91 * compression algorithm92 *93 * @alg: algorithm definition94 *95 * Return: zero on success; error code in case of error96 */97int crypto_register_acomp(struct acomp_alg *alg);98 99/**100 * crypto_unregister_acomp() -- Unregister asynchronous compression algorithm101 *102 * Function unregisters an implementation of an asynchronous103 * compression algorithm104 *105 * @alg: algorithm definition106 */107void crypto_unregister_acomp(struct acomp_alg *alg);108 109int crypto_register_acomps(struct acomp_alg *algs, int count);110void crypto_unregister_acomps(struct acomp_alg *algs, int count);111 112#endif113