[mirror_ubuntu-bionic-kernel.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;
	spinlock_t q_lock;
	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;
9abffc6f	30	spinlock_t q_lock;
1e65b81a TC	31	struct work_struct work;
	32	};
	33
	34	struct mcryptd_queue {
	35	struct mcryptd_cpu_queue __percpu *cpu_queue;
	36	};
	37
	38	struct mcryptd_instance_ctx {
	39	struct crypto_spawn spawn;
	40	struct mcryptd_queue *queue;
	41	};
	42
	43	struct mcryptd_hash_ctx {
331bf739	44	struct crypto_ahash *child;
1e65b81a TC	45	struct mcryptd_alg_state *alg_state;
	46	};
	47
	48	struct mcryptd_tag {
	49	/* seq number of request */
	50	unsigned seq_num;
	51	/* arrival time of request */
	52	unsigned long arrival;
	53	unsigned long expire;
	54	int cpu;
	55	};
	56
	57	struct mcryptd_hash_request_ctx {
	58	struct list_head waiter;
	59	crypto_completion_t complete;
	60	struct mcryptd_tag tag;
	61	struct crypto_hash_walk walk;
	62	u8 *out;
	63	int flag;
331bf739	64	struct ahash_request areq;
1e65b81a TC	65	};
	66
	67	struct mcryptd_ahash mcryptd_alloc_ahash(const char alg_name,
	68	u32 type, u32 mask);
331bf739 MD	69	struct crypto_ahash mcryptd_ahash_child(struct mcryptd_ahash tfm);
331bf739 MD	70	struct ahash_request mcryptd_ahash_desc(struct ahash_request req);
1e65b81a TC	71	void mcryptd_free_ahash(struct mcryptd_ahash *tfm);
	72	void mcryptd_flusher(struct work_struct *work);
	73
	74	enum mcryptd_req_type {
	75	MCRYPTD_NONE,
	76	MCRYPTD_UPDATE,
	77	MCRYPTD_FINUP,
	78	MCRYPTD_DIGEST,
	79	MCRYPTD_FINAL
	80	};
	81
	82	struct mcryptd_alg_cstate {
	83	unsigned long next_flush;
	84	unsigned next_seq_num;
	85	bool flusher_engaged;
	86	struct delayed_work flush;
	87	int cpu;
	88	struct mcryptd_alg_state *alg_state;
	89	void *mgr;
	90	spinlock_t work_lock;
	91	struct list_head work_list;
	92	struct list_head flush_list;
	93	};
	94
	95	struct mcryptd_alg_state {
	96	struct mcryptd_alg_cstate __percpu *alg_cstate;
	97	unsigned long (flusher)(struct mcryptd_alg_cstate cstate);
	98	};
	99
	100	/* return delay in jiffies from current time */
	101	static inline unsigned long get_delay(unsigned long t)
	102	{
	103	long delay;
	104
	105	delay = (long) t - (long) jiffies;
	106	if (delay <= 0)
	107	return 0;
	108	else
	109	return (unsigned long) delay;
	110	}
	111
	112	void mcryptd_arm_flusher(struct mcryptd_alg_cstate *cstate, unsigned long delay);
	113
	114	#endif