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

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Crypto engine API
 *
 * Copyright (c) 2016 Baolin Wang <baolin.wang@linaro.org>
 */
#ifndef _CRYPTO_ENGINE_H
#define _CRYPTO_ENGINE_H

#include <linux/crypto.h>
#include <linux/list.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <crypto/algapi.h>
#include <crypto/aead.h>
#include <crypto/akcipher.h>
#include <crypto/hash.h>
#include <crypto/skcipher.h>

#define ENGINE_NAME_LEN	30
/*
 * struct crypto_engine - crypto hardware engine
 * @name: the engine name
 * @idling: the engine is entering idle state
 * @busy: request pump is busy
 * @running: the engine is on working
 * @cur_req_prepared: current request is prepared
 * @list: link with the global crypto engine list
 * @queue_lock: spinlock to syncronise access to request queue
 * @queue: the crypto queue of the engine
 * @rt: whether this queue is set to run as a realtime task
 * @prepare_crypt_hardware: a request will soon arrive from the queue
 * so the subsystem requests the driver to prepare the hardware
 * by issuing this call
 * @unprepare_crypt_hardware: there are currently no more requests on the
 * queue so the subsystem notifies the driver that it may relax the
 * hardware by issuing this call
 * @kworker: kthread worker struct for request pump
 * @pump_requests: work struct for scheduling work to the request pump
 * @priv_data: the engine private data
 * @cur_req: the current request which is on processing
 */
struct crypto_engine {
	char			name[ENGINE_NAME_LEN];
	bool			idling;
	bool			busy;
	bool			running;
	bool			cur_req_prepared;

	struct list_head	list;
	spinlock_t		queue_lock;
	struct crypto_queue	queue;
	struct device		*dev;

	bool			rt;

	int (*prepare_crypt_hardware)(struct crypto_engine *engine);
	int (*unprepare_crypt_hardware)(struct crypto_engine *engine);

	struct kthread_worker           *kworker;
	struct kthread_work             pump_requests;

	void				*priv_data;
	struct crypto_async_request	*cur_req;
};

/*
 * struct crypto_engine_op - crypto hardware engine operations
 * @prepare__request: do some prepare if need before handle the current request
 * @unprepare_request: undo any work done by prepare_request()
 * @do_one_request: do encryption for current request
 */
struct crypto_engine_op {
	int (*prepare_request)(struct crypto_engine *engine,
			       void *areq);
	int (*unprepare_request)(struct crypto_engine *engine,
				 void *areq);
	int (*do_one_request)(struct crypto_engine *engine,
			      void *areq);
};

struct crypto_engine_ctx {
	struct crypto_engine_op op;
};

int crypto_transfer_aead_request_to_engine(struct crypto_engine *engine,
					   struct aead_request *req);
int crypto_transfer_akcipher_request_to_engine(struct crypto_engine *engine,
					       struct akcipher_request *req);
int crypto_transfer_hash_request_to_engine(struct crypto_engine *engine,
					       struct ahash_request *req);
int crypto_transfer_skcipher_request_to_engine(struct crypto_engine *engine,
					       struct skcipher_request *req);
void crypto_finalize_aead_request(struct crypto_engine *engine,
				  struct aead_request *req, int err);
void crypto_finalize_akcipher_request(struct crypto_engine *engine,
				      struct akcipher_request *req, int err);
void crypto_finalize_hash_request(struct crypto_engine *engine,
				  struct ahash_request *req, int err);
void crypto_finalize_skcipher_request(struct crypto_engine *engine,
				      struct skcipher_request *req, int err);
int crypto_engine_start(struct crypto_engine *engine);
int crypto_engine_stop(struct crypto_engine *engine);
struct crypto_engine *crypto_engine_alloc_init(struct device *dev, bool rt);
int crypto_engine_exit(struct crypto_engine *engine);

#endif /* _CRYPTO_ENGINE_H */
Commit	Line	Data
2874c5fd	1	/* SPDX-License-Identifier: GPL-2.0-or-later */
2589ad84 CL	2	/*
	3	* Crypto engine API
	4	*
	5	* Copyright (c) 2016 Baolin Wang <baolin.wang@linaro.org>
2589ad84 CL	6	*/
	7	#ifndef _CRYPTO_ENGINE_H
	8	#define _CRYPTO_ENGINE_H
	9
	10	#include <linux/crypto.h>
	11	#include <linux/list.h>
	12	#include <linux/kernel.h>
	13	#include <linux/kthread.h>
	14	#include <crypto/algapi.h>
218d1cc1 CL	15	#include <crypto/aead.h>
218d1cc1 CL	16	#include <crypto/akcipher.h>
4cba7cf0	17	#include <crypto/hash.h>
218d1cc1	18	#include <crypto/skcipher.h>
2589ad84 CL	19
	20	#define ENGINE_NAME_LEN 30
	21	/*
	22	* struct crypto_engine - crypto hardware engine
	23	* @name: the engine name
	24	* @idling: the engine is entering idle state
	25	* @busy: request pump is busy
	26	* @running: the engine is on working
	27	* @cur_req_prepared: current request is prepared
	28	* @list: link with the global crypto engine list
	29	* @queue_lock: spinlock to syncronise access to request queue
	30	* @queue: the crypto queue of the engine
	31	* @rt: whether this queue is set to run as a realtime task
	32	* @prepare_crypt_hardware: a request will soon arrive from the queue
	33	* so the subsystem requests the driver to prepare the hardware
	34	* by issuing this call
	35	* @unprepare_crypt_hardware: there are currently no more requests on the
	36	* queue so the subsystem notifies the driver that it may relax the
	37	* hardware by issuing this call
c4ca2b0b	38	* @kworker: kthread worker struct for request pump
2589ad84 CL	39	* @pump_requests: work struct for scheduling work to the request pump
	40	* @priv_data: the engine private data
	41	* @cur_req: the current request which is on processing
	42	*/
	43	struct crypto_engine {
	44	char name[ENGINE_NAME_LEN];
	45	bool idling;
	46	bool busy;
	47	bool running;
	48	bool cur_req_prepared;
	49
	50	struct list_head list;
	51	spinlock_t queue_lock;
	52	struct crypto_queue queue;
88d58ef8	53	struct device *dev;
2589ad84 CL	54
	55	bool rt;
	56
	57	int (prepare_crypt_hardware)(struct crypto_engine engine);
	58	int (unprepare_crypt_hardware)(struct crypto_engine engine);
	59
c4ca2b0b	60	struct kthread_worker *kworker;
2589ad84 CL	61	struct kthread_work pump_requests;
	62
	63	void *priv_data;
4cba7cf0	64	struct crypto_async_request *cur_req;
2589ad84 CL	65	};
2589ad84 CL	66
218d1cc1 CL	67	/*
	68	* struct crypto_engine_op - crypto hardware engine operations
	69	* @prepare__request: do some prepare if need before handle the current request
	70	* @unprepare_request: undo any work done by prepare_request()
	71	* @do_one_request: do encryption for current request
	72	*/
	73	struct crypto_engine_op {
	74	int (prepare_request)(struct crypto_engine engine,
	75	void *areq);
	76	int (unprepare_request)(struct crypto_engine engine,
	77	void *areq);
	78	int (do_one_request)(struct crypto_engine engine,
	79	void *areq);
	80	};
	81
	82	struct crypto_engine_ctx {
	83	struct crypto_engine_op op;
	84	};
	85
218d1cc1 CL	86	int crypto_transfer_aead_request_to_engine(struct crypto_engine *engine,
	87	struct aead_request *req);
	88	int crypto_transfer_akcipher_request_to_engine(struct crypto_engine *engine,
	89	struct akcipher_request *req);
4cba7cf0	90	int crypto_transfer_hash_request_to_engine(struct crypto_engine *engine,
218d1cc1 CL	91	struct ahash_request *req);
	92	int crypto_transfer_skcipher_request_to_engine(struct crypto_engine *engine,
	93	struct skcipher_request *req);
218d1cc1 CL	94	void crypto_finalize_aead_request(struct crypto_engine *engine,
	95	struct aead_request *req, int err);
	96	void crypto_finalize_akcipher_request(struct crypto_engine *engine,
	97	struct akcipher_request *req, int err);
4cba7cf0 CL	98	void crypto_finalize_hash_request(struct crypto_engine *engine,
4cba7cf0 CL	99	struct ahash_request *req, int err);
218d1cc1 CL	100	void crypto_finalize_skcipher_request(struct crypto_engine *engine,
218d1cc1 CL	101	struct skcipher_request *req, int err);
2589ad84 CL	102	int crypto_engine_start(struct crypto_engine *engine);
	103	int crypto_engine_stop(struct crypto_engine *engine);
	104	struct crypto_engine crypto_engine_alloc_init(struct device dev, bool rt);
	105	int crypto_engine_exit(struct crypto_engine *engine);
	106
	107	#endif /* _CRYPTO_ENGINE_H */