[linux-2.6-block.git] / include / crypto / internal / scompress.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Synchronous Compression operations
 *
 * Copyright 2015 LG Electronics Inc.
 * Copyright (c) 2016, Intel Corporation
 * Author: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
 */
#ifndef _CRYPTO_SCOMP_INT_H
#define _CRYPTO_SCOMP_INT_H
#include <linux/crypto.h>

#define SCOMP_SCRATCH_SIZE	131072

struct crypto_scomp {
	struct crypto_tfm base;
};

/**
 * struct scomp_alg - synchronous compression algorithm
 *
 * @alloc_ctx:	Function allocates algorithm specific context
 * @free_ctx:	Function frees context allocated with alloc_ctx
 * @compress:	Function performs a compress operation
 * @decompress:	Function performs a de-compress operation
 * @base:	Common crypto API algorithm data structure
 */
struct scomp_alg {
	void *(*alloc_ctx)(struct crypto_scomp *tfm);
	void (*free_ctx)(struct crypto_scomp *tfm, void *ctx);
	int (*compress)(struct crypto_scomp *tfm, const u8 *src,
			unsigned int slen, u8 *dst, unsigned int *dlen,
			void *ctx);
	int (*decompress)(struct crypto_scomp *tfm, const u8 *src,
			  unsigned int slen, u8 *dst, unsigned int *dlen,
			  void *ctx);
	struct crypto_alg base;
};

static inline struct scomp_alg *__crypto_scomp_alg(struct crypto_alg *alg)
{
	return container_of(alg, struct scomp_alg, base);
}

static inline struct crypto_scomp *__crypto_scomp_tfm(struct crypto_tfm *tfm)
{
	return container_of(tfm, struct crypto_scomp, base);
}

static inline struct crypto_tfm *crypto_scomp_tfm(struct crypto_scomp *tfm)
{
	return &tfm->base;
}

static inline void crypto_free_scomp(struct crypto_scomp *tfm)
{
	crypto_destroy_tfm(tfm, crypto_scomp_tfm(tfm));
}

static inline struct scomp_alg *crypto_scomp_alg(struct crypto_scomp *tfm)
{
	return __crypto_scomp_alg(crypto_scomp_tfm(tfm)->__crt_alg);
}

static inline void *crypto_scomp_alloc_ctx(struct crypto_scomp *tfm)
{
	return crypto_scomp_alg(tfm)->alloc_ctx(tfm);
}

static inline void crypto_scomp_free_ctx(struct crypto_scomp *tfm,
					 void *ctx)
{
	return crypto_scomp_alg(tfm)->free_ctx(tfm, ctx);
}

static inline int crypto_scomp_compress(struct crypto_scomp *tfm,
					const u8 *src, unsigned int slen,
					u8 *dst, unsigned int *dlen, void *ctx)
{
	return crypto_scomp_alg(tfm)->compress(tfm, src, slen, dst, dlen, ctx);
}

static inline int crypto_scomp_decompress(struct crypto_scomp *tfm,
					  const u8 *src, unsigned int slen,
					  u8 *dst, unsigned int *dlen,
					  void *ctx)
{
	return crypto_scomp_alg(tfm)->decompress(tfm, src, slen, dst, dlen,
						 ctx);
}

int crypto_init_scomp_ops_async(struct crypto_tfm *tfm);
struct acomp_req *crypto_acomp_scomp_alloc_ctx(struct acomp_req *req);
void crypto_acomp_scomp_free_ctx(struct acomp_req *req);

/**
 * crypto_register_scomp() -- Register synchronous compression algorithm
 *
 * Function registers an implementation of a synchronous
 * compression algorithm
 *
 * @alg:	algorithm definition
 *
 * Return: zero on success; error code in case of error
 */
int crypto_register_scomp(struct scomp_alg *alg);

/**
 * crypto_unregister_scomp() -- Unregister synchronous compression algorithm
 *
 * Function unregisters an implementation of a synchronous
 * compression algorithm
 *
 * @alg:	algorithm definition
 *
 * Return: zero on success; error code in case of error
 */
int crypto_unregister_scomp(struct scomp_alg *alg);

int crypto_register_scomps(struct scomp_alg *algs, int count);
void crypto_unregister_scomps(struct scomp_alg *algs, int count);

#endif
Commit	Line	Data
2874c5fd	1	/* SPDX-License-Identifier: GPL-2.0-or-later */
1ab53a77 GC	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>
1ab53a77 GC	8	*/
	9	#ifndef _CRYPTO_SCOMP_INT_H
	10	#define _CRYPTO_SCOMP_INT_H
	11	#include <linux/crypto.h>
	12
	13	#define SCOMP_SCRATCH_SIZE 131072
	14
	15	struct crypto_scomp {
	16	struct crypto_tfm base;
	17	};
	18
	19	/**
	20	* struct scomp_alg - synchronous compression algorithm
	21	*
	22	* @alloc_ctx: Function allocates algorithm specific context
	23	* @free_ctx: Function frees context allocated with alloc_ctx
	24	* @compress: Function performs a compress operation
	25	* @decompress: Function performs a de-compress operation
1ab53a77 GC	26	* @base: Common crypto API algorithm data structure
	27	*/
	28	struct scomp_alg {
	29	void (alloc_ctx)(struct crypto_scomp *tfm);
	30	void (free_ctx)(struct crypto_scomp tfm, void *ctx);
	31	int (compress)(struct crypto_scomp tfm, const u8 *src,
	32	unsigned int slen, u8 dst, unsigned int dlen,
	33	void *ctx);
	34	int (decompress)(struct crypto_scomp tfm, const u8 *src,
	35	unsigned int slen, u8 dst, unsigned int dlen,
	36	void *ctx);
	37	struct crypto_alg base;
	38	};
	39
	40	static inline struct scomp_alg __crypto_scomp_alg(struct crypto_alg alg)
	41	{
	42	return container_of(alg, struct scomp_alg, base);
	43	}
	44
	45	static inline struct crypto_scomp __crypto_scomp_tfm(struct crypto_tfm tfm)
	46	{
	47	return container_of(tfm, struct crypto_scomp, base);
	48	}
	49
	50	static inline struct crypto_tfm crypto_scomp_tfm(struct crypto_scomp tfm)
	51	{
	52	return &tfm->base;
	53	}
	54
	55	static inline void crypto_free_scomp(struct crypto_scomp *tfm)
	56	{
	57	crypto_destroy_tfm(tfm, crypto_scomp_tfm(tfm));
	58	}
	59
	60	static inline struct scomp_alg crypto_scomp_alg(struct crypto_scomp tfm)
	61	{
	62	return __crypto_scomp_alg(crypto_scomp_tfm(tfm)->__crt_alg);
	63	}
	64
	65	static inline void crypto_scomp_alloc_ctx(struct crypto_scomp tfm)
	66	{
	67	return crypto_scomp_alg(tfm)->alloc_ctx(tfm);
	68	}
	69
	70	static inline void crypto_scomp_free_ctx(struct crypto_scomp *tfm,
	71	void *ctx)
	72	{
	73	return crypto_scomp_alg(tfm)->free_ctx(tfm, ctx);
	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	int crypto_init_scomp_ops_async(struct crypto_tfm *tfm);
93	struct acomp_req crypto_acomp_scomp_alloc_ctx(struct acomp_req req);
94	void crypto_acomp_scomp_free_ctx(struct acomp_req *req);
95
96	/**
97	* crypto_register_scomp() -- Register synchronous compression algorithm
98	*
99	* Function registers an implementation of a synchronous
100	* compression algorithm
101	*
102	* @alg: algorithm definition
103	*
104	* Return: zero on success; error code in case of error
105	*/
106	int crypto_register_scomp(struct scomp_alg *alg);
107
108	/**
109	* crypto_unregister_scomp() -- Unregister synchronous compression algorithm
110	*
111	* Function unregisters an implementation of a synchronous
112	* compression algorithm
113	*
114	* @alg: algorithm definition
115	*
116	* Return: zero on success; error code in case of error
117	*/
118	int crypto_unregister_scomp(struct scomp_alg *alg);
119
3de4f5e1 GC	120	int crypto_register_scomps(struct scomp_alg *algs, int count);
	121	void crypto_unregister_scomps(struct scomp_alg *algs, int count);
	122
1ab53a77	123	#endif