/* * Crypto engine API * * Copyright (c) 2016 Baolin Wang <baolin.wang@linaro.org> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the Free * Software Foundation; either version 2 of the License, or (at your option) * any later version. * */#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/hash.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 * @prepare_cipher_request: do some prepare if need before handle the current request * @unprepare_cipher_request: undo any work done by prepare_cipher_request() * @cipher_one_request: do encryption for current request * @prepare_hash_request: do some prepare if need before handle the current request * @unprepare_hash_request: undo any work done by prepare_hash_request() * @hash_one_request: do hash for current request * @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); 	int (*prepare_cipher_request)(struct crypto_engine *engine,				      struct ablkcipher_request *req);	int (*unprepare_cipher_request)(struct crypto_engine *engine,					struct ablkcipher_request *req);	int (*prepare_hash_request)(struct crypto_engine *engine,				    struct ahash_request *req);	int (*unprepare_hash_request)(struct crypto_engine *engine,				      struct ahash_request *req);	int (*cipher_one_request)(struct crypto_engine *engine,				  struct ablkcipher_request *req);	int (*hash_one_request)(struct crypto_engine *engine,				struct ahash_request *req); 	struct kthread_worker           *kworker;	struct kthread_work             pump_requests; 	void				*priv_data;	struct crypto_async_request	*cur_req;}; int crypto_transfer_cipher_request(struct crypto_engine *engine,				   struct ablkcipher_request *req,				   bool need_pump);int crypto_transfer_cipher_request_to_engine(struct crypto_engine *engine,					     struct ablkcipher_request *req);int crypto_transfer_hash_request(struct crypto_engine *engine,				 struct ahash_request *req, bool need_pump);int crypto_transfer_hash_request_to_engine(struct crypto_engine *engine,					   struct ahash_request *req);void crypto_finalize_cipher_request(struct crypto_engine *engine,				    struct ablkcipher_request *req, int err);void crypto_finalize_hash_request(struct crypto_engine *engine,				  struct ahash_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 */