2874c5fd28
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
112 lines
3.9 KiB
C
112 lines
3.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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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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#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/aead.h>
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#include <crypto/akcipher.h>
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#include <crypto/hash.h>
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#include <crypto/skcipher.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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* @kworker: kthread worker struct for request pump
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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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struct device *dev;
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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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struct kthread_worker *kworker;
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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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/*
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* struct crypto_engine_op - crypto hardware engine operations
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* @prepare__request: do some prepare if need before handle the current request
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* @unprepare_request: undo any work done by prepare_request()
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* @do_one_request: do encryption for current request
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*/
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struct crypto_engine_op {
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int (*prepare_request)(struct crypto_engine *engine,
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void *areq);
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int (*unprepare_request)(struct crypto_engine *engine,
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void *areq);
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int (*do_one_request)(struct crypto_engine *engine,
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void *areq);
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};
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struct crypto_engine_ctx {
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struct crypto_engine_op op;
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};
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int crypto_transfer_ablkcipher_request_to_engine(struct crypto_engine *engine,
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struct ablkcipher_request *req);
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int crypto_transfer_aead_request_to_engine(struct crypto_engine *engine,
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struct aead_request *req);
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int crypto_transfer_akcipher_request_to_engine(struct crypto_engine *engine,
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struct akcipher_request *req);
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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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int crypto_transfer_skcipher_request_to_engine(struct crypto_engine *engine,
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struct skcipher_request *req);
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void crypto_finalize_ablkcipher_request(struct crypto_engine *engine,
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struct ablkcipher_request *req, int err);
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void crypto_finalize_aead_request(struct crypto_engine *engine,
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struct aead_request *req, int err);
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void crypto_finalize_akcipher_request(struct crypto_engine *engine,
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struct akcipher_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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void crypto_finalize_skcipher_request(struct crypto_engine *engine,
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struct skcipher_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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