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4cba7cf025
The current crypto engine allow only ablkcipher_request to be enqueued. Thus denying any use of it for hardware that also handle hash algo. This patch modify the API for allowing to enqueue ciphers and hash. Since omap-aes/omap-des are the only users, this patch also convert them to the new cryptoengine API. Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
107 lines
4.1 KiB
C
107 lines
4.1 KiB
C
/*
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* Crypto engine API
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*
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* Copyright (c) 2016 Baolin Wang <baolin.wang@linaro.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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*/
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#ifndef _CRYPTO_ENGINE_H
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#define _CRYPTO_ENGINE_H
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#include <linux/crypto.h>
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#include <linux/list.h>
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#include <linux/kernel.h>
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#include <linux/kthread.h>
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#include <crypto/algapi.h>
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#include <crypto/hash.h>
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#define ENGINE_NAME_LEN 30
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/*
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* struct crypto_engine - crypto hardware engine
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* @name: the engine name
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* @idling: the engine is entering idle state
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* @busy: request pump is busy
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* @running: the engine is on working
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* @cur_req_prepared: current request is prepared
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* @list: link with the global crypto engine list
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* @queue_lock: spinlock to syncronise access to request queue
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* @queue: the crypto queue of the engine
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* @rt: whether this queue is set to run as a realtime task
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* @prepare_crypt_hardware: a request will soon arrive from the queue
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* so the subsystem requests the driver to prepare the hardware
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* by issuing this call
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* @unprepare_crypt_hardware: there are currently no more requests on the
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* queue so the subsystem notifies the driver that it may relax the
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* hardware by issuing this call
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* @prepare_cipher_request: do some prepare if need before handle the current request
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* @unprepare_cipher_request: undo any work done by prepare_cipher_request()
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* @cipher_one_request: do encryption for current request
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* @prepare_hash_request: do some prepare if need before handle the current request
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* @unprepare_hash_request: undo any work done by prepare_hash_request()
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* @hash_one_request: do hash for current request
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* @kworker: thread struct for request pump
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* @kworker_task: pointer to task for request pump kworker thread
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* @pump_requests: work struct for scheduling work to the request pump
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* @priv_data: the engine private data
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* @cur_req: the current request which is on processing
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*/
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struct crypto_engine {
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char name[ENGINE_NAME_LEN];
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bool idling;
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bool busy;
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bool running;
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bool cur_req_prepared;
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struct list_head list;
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spinlock_t queue_lock;
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struct crypto_queue queue;
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bool rt;
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int (*prepare_crypt_hardware)(struct crypto_engine *engine);
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int (*unprepare_crypt_hardware)(struct crypto_engine *engine);
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int (*prepare_cipher_request)(struct crypto_engine *engine,
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struct ablkcipher_request *req);
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int (*unprepare_cipher_request)(struct crypto_engine *engine,
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struct ablkcipher_request *req);
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int (*prepare_hash_request)(struct crypto_engine *engine,
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struct ahash_request *req);
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int (*unprepare_hash_request)(struct crypto_engine *engine,
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struct ahash_request *req);
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int (*cipher_one_request)(struct crypto_engine *engine,
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struct ablkcipher_request *req);
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int (*hash_one_request)(struct crypto_engine *engine,
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struct ahash_request *req);
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struct kthread_worker kworker;
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struct task_struct *kworker_task;
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struct kthread_work pump_requests;
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void *priv_data;
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struct crypto_async_request *cur_req;
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};
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int crypto_transfer_cipher_request(struct crypto_engine *engine,
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struct ablkcipher_request *req,
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bool need_pump);
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int crypto_transfer_cipher_request_to_engine(struct crypto_engine *engine,
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struct ablkcipher_request *req);
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int crypto_transfer_hash_request(struct crypto_engine *engine,
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struct ahash_request *req, bool need_pump);
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int crypto_transfer_hash_request_to_engine(struct crypto_engine *engine,
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struct ahash_request *req);
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void crypto_finalize_cipher_request(struct crypto_engine *engine,
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struct ablkcipher_request *req, int err);
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void crypto_finalize_hash_request(struct crypto_engine *engine,
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struct ahash_request *req, int err);
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int crypto_engine_start(struct crypto_engine *engine);
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int crypto_engine_stop(struct crypto_engine *engine);
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struct crypto_engine *crypto_engine_alloc_init(struct device *dev, bool rt);
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int crypto_engine_exit(struct crypto_engine *engine);
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#endif /* _CRYPTO_ENGINE_H */
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