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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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1730c5aa3b
Add KPP support to the crypto engine queue manager, so that it can be used to simplify the logic of KPP device drivers as done for other crypto drivers. Signed-off-by: Prabhjot Khurana <prabhjot.khurana@intel.com> Signed-off-by: Daniele Alessandrelli <daniele.alessandrelli@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
123 lines
4.3 KiB
C
123 lines
4.3 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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#include <crypto/kpp.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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* @retry_support: indication that the hardware allows re-execution
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* of a failed backlog request
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* crypto-engine, in head position to keep order
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* @list: link with the global crypto engine list
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* @queue_lock: spinlock to synchronise 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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* @do_batch_requests: execute a batch of requests. Depends on multiple
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* requests support.
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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 retry_support;
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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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int (*do_batch_requests)(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_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_kpp_request_to_engine(struct crypto_engine *engine,
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struct kpp_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_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_kpp_request(struct crypto_engine *engine,
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struct kpp_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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struct crypto_engine *crypto_engine_alloc_init_and_set(struct device *dev,
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bool retry_support,
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int (*cbk_do_batch)(struct crypto_engine *engine),
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bool rt, int qlen);
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int crypto_engine_exit(struct crypto_engine *engine);
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#endif /* _CRYPTO_ENGINE_H */
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