/* 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
|
* @retry_support: indication that the hardware allows re-execution
|
* of a failed backlog request
|
* crypto-engine, in head position to keep order
|
* @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
|
* @do_batch_requests: execute a batch of requests. Depends on multiple
|
* requests support.
|
* @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 retry_support;
|
|
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 (*do_batch_requests)(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);
|
struct crypto_engine *crypto_engine_alloc_init_and_set(struct device *dev,
|
bool retry_support,
|
int (*cbk_do_batch)(struct crypto_engine *engine),
|
bool rt, int qlen);
|
int crypto_engine_exit(struct crypto_engine *engine);
|
|
#endif /* _CRYPTO_ENGINE_H */
|
