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

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Software async multibuffer crypto daemon headers
 *
 *    Author:
 *             Tim Chen <tim.c.chen@linux.intel.com>
 *
 *    Copyright (c) 2014, Intel Corporation.
 */

#ifndef _CRYPTO_MCRYPT_H
#define _CRYPTO_MCRYPT_H

#include <linux/crypto.h>
#include <linux/kernel.h>
#include <crypto/hash.h>

struct mcryptd_ahash {
	struct crypto_ahash base;
};

static inline struct mcryptd_ahash *__mcryptd_ahash_cast(
	struct crypto_ahash *tfm)
{
	return (struct mcryptd_ahash *)tfm;
}

struct mcryptd_cpu_queue {
	struct crypto_queue queue;
	struct work_struct work;
};

struct mcryptd_queue {
	struct mcryptd_cpu_queue __percpu *cpu_queue;
};

struct mcryptd_instance_ctx {
	struct crypto_spawn spawn;
	struct mcryptd_queue *queue;
};

struct mcryptd_hash_ctx {
	struct crypto_ahash *child;
	struct mcryptd_alg_state *alg_state;
};

struct mcryptd_tag {
	/* seq number of request */
	unsigned seq_num;
	/* arrival time of request */
	unsigned long arrival;
	unsigned long expire;
	int	cpu;
};

struct mcryptd_hash_request_ctx {
	struct list_head waiter;
	crypto_completion_t complete;
	struct mcryptd_tag tag;
	struct crypto_hash_walk walk;
	u8 *out;
	int flag;
	struct ahash_request areq;
};

struct mcryptd_ahash *mcryptd_alloc_ahash(const char *alg_name,
					u32 type, u32 mask);
struct crypto_ahash *mcryptd_ahash_child(struct mcryptd_ahash *tfm);
struct ahash_request *mcryptd_ahash_desc(struct ahash_request *req);
void mcryptd_free_ahash(struct mcryptd_ahash *tfm);
void mcryptd_flusher(struct work_struct *work);

enum mcryptd_req_type {
	MCRYPTD_NONE,
	MCRYPTD_UPDATE,
	MCRYPTD_FINUP,
	MCRYPTD_DIGEST,
	MCRYPTD_FINAL
};

struct mcryptd_alg_cstate {
	unsigned long next_flush;
	unsigned next_seq_num;
	bool	flusher_engaged;
	struct  delayed_work flush;
	int	cpu;
	struct  mcryptd_alg_state *alg_state;
	void	*mgr;
	spinlock_t work_lock;
	struct list_head work_list;
	struct list_head flush_list;
};

struct mcryptd_alg_state {
	struct mcryptd_alg_cstate __percpu *alg_cstate;
	unsigned long (*flusher)(struct mcryptd_alg_cstate *cstate);
};

/* return delay in jiffies from current time */
static inline unsigned long get_delay(unsigned long t)
{
	long delay;

	delay = (long) t - (long) jiffies;
	if (delay <= 0)
		return 0;
	else
		return (unsigned long) delay;
}

void mcryptd_arm_flusher(struct mcryptd_alg_cstate *cstate, unsigned long delay);

#endif
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1e65b81a TC	2	/*
	3	* Software async multibuffer crypto daemon headers
	4	*
	5	* Author:
	6	* Tim Chen <tim.c.chen@linux.intel.com>
	7	*
	8	* Copyright (c) 2014, Intel Corporation.
	9	*/
	10
	11	#ifndef _CRYPTO_MCRYPT_H
	12	#define _CRYPTO_MCRYPT_H
	13
	14	#include <linux/crypto.h>
	15	#include <linux/kernel.h>
	16	#include <crypto/hash.h>
	17
	18	struct mcryptd_ahash {
	19	struct crypto_ahash base;
	20	};
	21
	22	static inline struct mcryptd_ahash *__mcryptd_ahash_cast(
	23	struct crypto_ahash *tfm)
	24	{
	25	return (struct mcryptd_ahash *)tfm;
	26	}
	27
	28	struct mcryptd_cpu_queue {
	29	struct crypto_queue queue;
	30	struct work_struct work;
	31	};
	32
	33	struct mcryptd_queue {
	34	struct mcryptd_cpu_queue __percpu *cpu_queue;
	35	};
	36
	37	struct mcryptd_instance_ctx {
	38	struct crypto_spawn spawn;
	39	struct mcryptd_queue *queue;
	40	};
	41
	42	struct mcryptd_hash_ctx {
331bf739	43	struct crypto_ahash *child;
1e65b81a TC	44	struct mcryptd_alg_state *alg_state;
	45	};
	46
	47	struct mcryptd_tag {
	48	/* seq number of request */
	49	unsigned seq_num;
	50	/* arrival time of request */
	51	unsigned long arrival;
	52	unsigned long expire;
	53	int cpu;
	54	};
	55
	56	struct mcryptd_hash_request_ctx {
	57	struct list_head waiter;
	58	crypto_completion_t complete;
	59	struct mcryptd_tag tag;
	60	struct crypto_hash_walk walk;
	61	u8 *out;
	62	int flag;
331bf739	63	struct ahash_request areq;
1e65b81a TC	64	};
	65
	66	struct mcryptd_ahash mcryptd_alloc_ahash(const char alg_name,
	67	u32 type, u32 mask);
331bf739 MD	68	struct crypto_ahash mcryptd_ahash_child(struct mcryptd_ahash tfm);
331bf739 MD	69	struct ahash_request mcryptd_ahash_desc(struct ahash_request req);
1e65b81a TC	70	void mcryptd_free_ahash(struct mcryptd_ahash *tfm);
	71	void mcryptd_flusher(struct work_struct *work);
	72
	73	enum mcryptd_req_type {
	74	MCRYPTD_NONE,
	75	MCRYPTD_UPDATE,
	76	MCRYPTD_FINUP,
	77	MCRYPTD_DIGEST,
	78	MCRYPTD_FINAL
	79	};
	80
	81	struct mcryptd_alg_cstate {
	82	unsigned long next_flush;
	83	unsigned next_seq_num;
	84	bool flusher_engaged;
	85	struct delayed_work flush;
	86	int cpu;
	87	struct mcryptd_alg_state *alg_state;
	88	void *mgr;
	89	spinlock_t work_lock;
	90	struct list_head work_list;
	91	struct list_head flush_list;
	92	};
	93
	94	struct mcryptd_alg_state {
	95	struct mcryptd_alg_cstate __percpu *alg_cstate;
	96	unsigned long (flusher)(struct mcryptd_alg_cstate cstate);
	97	};
	98
	99	/* return delay in jiffies from current time */
	100	static inline unsigned long get_delay(unsigned long t)
	101	{
	102	long delay;
	103
	104	delay = (long) t - (long) jiffies;
	105	if (delay <= 0)
	106	return 0;
	107	else
	108	return (unsigned long) delay;
	109	}
	110
	111	void mcryptd_arm_flusher(struct mcryptd_alg_cstate *cstate, unsigned long delay);
	112
	113	#endif