[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 <crypto/acompress.h>
#include <crypto/algapi.h>

#define SCOMP_SCRATCH_SIZE	131072

struct acomp_req;

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
 * @calg:	Cmonn algorithm data structure shared with acomp
 */
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);

	union {
		struct COMP_ALG_COMMON;
		struct comp_alg_common calg;
	};
};

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);
}

/**
 * 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
 */
void 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
14386d47	11
0a742389	12	#include <crypto/acompress.h>
14386d47	13	#include <crypto/algapi.h>
1ab53a77 GC	14
	15	#define SCOMP_SCRATCH_SIZE 131072
	16
0a742389 HX	17	struct acomp_req;
0a742389 HX	18
1ab53a77 GC	19	struct crypto_scomp {
	20	struct crypto_tfm base;
	21	};
	22
	23	/**
	24	* struct scomp_alg - synchronous compression algorithm
	25	*
	26	* @alloc_ctx: Function allocates algorithm specific context
	27	* @free_ctx: Function frees context allocated with alloc_ctx
	28	* @compress: Function performs a compress operation
	29	* @decompress: Function performs a de-compress operation
1ab53a77	30	* @base: Common crypto API algorithm data structure
0a742389	31	* @calg: Cmonn algorithm data structure shared with acomp
1ab53a77 GC	32	*/
	33	struct 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);
0a742389 HX	42
	43	union {
	44	struct COMP_ALG_COMMON;
	45	struct comp_alg_common calg;
	46	};
1ab53a77 GC	47	};
	48
	49	static inline struct scomp_alg __crypto_scomp_alg(struct crypto_alg alg)
	50	{
	51	return container_of(alg, struct scomp_alg, base);
	52	}
	53
	54	static inline struct crypto_scomp __crypto_scomp_tfm(struct crypto_tfm tfm)
	55	{
	56	return container_of(tfm, struct crypto_scomp, base);
	57	}
	58
	59	static inline struct crypto_tfm crypto_scomp_tfm(struct crypto_scomp tfm)
	60	{
	61	return &tfm->base;
	62	}
	63
	64	static inline void crypto_free_scomp(struct crypto_scomp *tfm)
	65	{
	66	crypto_destroy_tfm(tfm, crypto_scomp_tfm(tfm));
	67	}
	68
	69	static 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
	74	static inline void crypto_scomp_alloc_ctx(struct crypto_scomp tfm)
	75	{
	76	return crypto_scomp_alg(tfm)->alloc_ctx(tfm);
	77	}
	78
	79	static 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
	85	static 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
	92	static 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
1ab53a77 GC	101	/**
	102	* crypto_register_scomp() -- Register synchronous compression algorithm
	103	*
	104	* Function registers an implementation of a synchronous
	105	* compression algorithm
	106	*
	107	* @alg: algorithm definition
	108	*
	109	* Return: zero on success; error code in case of error
	110	*/
	111	int crypto_register_scomp(struct scomp_alg *alg);
	112
	113	/**
	114	* crypto_unregister_scomp() -- Unregister synchronous compression algorithm
	115	*
	116	* Function unregisters an implementation of a synchronous
	117	* compression algorithm
	118	*
	119	* @alg: algorithm definition
1ab53a77	120	*/
c6d633a9	121	void crypto_unregister_scomp(struct scomp_alg *alg);
1ab53a77	122
3de4f5e1 GC	123	int crypto_register_scomps(struct scomp_alg *algs, int count);
	124	void crypto_unregister_scomps(struct scomp_alg *algs, int count);
	125
1ab53a77	126	#endif