1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Asynchronous Compression operations
5 * Copyright (c) 2016, Intel Corporation
6 * Authors: Weigang Li <weigang.li@intel.com>
7 * Giovanni Cabiddu <giovanni.cabiddu@intel.com>
9 #ifndef _CRYPTO_ACOMP_INT_H
10 #define _CRYPTO_ACOMP_INT_H
12 #include <crypto/acompress.h>
13 #include <crypto/algapi.h>
16 * struct acomp_alg - asynchronous compression algorithm
18 * @compress: Function performs a compress operation
19 * @decompress: Function performs a de-compress operation
20 * @dst_free: Frees destination buffer if allocated inside the algorithm
21 * @init: Initialize the cryptographic transformation object.
22 * This function is used to initialize the cryptographic
23 * transformation object. This function is called only once at
24 * the instantiation time, right after the transformation context
25 * was allocated. In case the cryptographic hardware has some
26 * special requirements which need to be handled by software, this
27 * function shall check for the precise requirement of the
28 * transformation and put any software fallbacks in place.
29 * @exit: Deinitialize the cryptographic transformation object. This is a
30 * counterpart to @init, used to remove various changes set in
33 * @reqsize: Context size for (de)compression requests
34 * @stat: Statistics for compress algorithm
35 * @base: Common crypto API algorithm data structure
36 * @calg: Cmonn algorithm data structure shared with scomp
39 int (*compress)(struct acomp_req *req);
40 int (*decompress)(struct acomp_req *req);
41 void (*dst_free)(struct scatterlist *dst);
42 int (*init)(struct crypto_acomp *tfm);
43 void (*exit)(struct crypto_acomp *tfm);
48 struct COMP_ALG_COMMON;
49 struct comp_alg_common calg;
54 * Transform internal helpers.
56 static inline void *acomp_request_ctx(struct acomp_req *req)
61 static inline void *acomp_tfm_ctx(struct crypto_acomp *tfm)
63 return tfm->base.__crt_ctx;
66 static inline void acomp_request_complete(struct acomp_req *req,
69 crypto_request_complete(&req->base, err);
72 static inline struct acomp_req *__acomp_request_alloc(struct crypto_acomp *tfm)
74 struct acomp_req *req;
76 req = kzalloc(sizeof(*req) + crypto_acomp_reqsize(tfm), GFP_KERNEL);
78 acomp_request_set_tfm(req, tfm);
82 static inline void __acomp_request_free(struct acomp_req *req)
88 * crypto_register_acomp() -- Register asynchronous compression algorithm
90 * Function registers an implementation of an asynchronous
91 * compression algorithm
93 * @alg: algorithm definition
95 * Return: zero on success; error code in case of error
97 int crypto_register_acomp(struct acomp_alg *alg);
100 * crypto_unregister_acomp() -- Unregister asynchronous compression algorithm
102 * Function unregisters an implementation of an asynchronous
103 * compression algorithm
105 * @alg: algorithm definition
107 void crypto_unregister_acomp(struct acomp_alg *alg);
109 int crypto_register_acomps(struct acomp_alg *algs, int count);
110 void crypto_unregister_acomps(struct acomp_alg *algs, int count);