crypto: engine - move crypto engine to its own header

This patch move the whole crypto engine API to its own header
crypto/engine.h.

Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 90 insertions, 0 deletions

diff --git a/include/crypto/engine.h b/include/crypto/engine.h
new file mode 100644
index 000000000000..40899bd246ec
--- /dev/null
+++ b/include/crypto/engine.h
@@ -0,0 +1,90 @@
+/*
+ * 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>
+
+#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_request: do some prepare if need before handle the current request
+ * @unprepare_request: undo any work done by prepare_message()
+ * @crypt_one_request: do encryption for current request
+ * @kworker: thread struct for request pump
+ * @kworker_task: pointer to task for request pump kworker thread
+ * @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;
+
+	bool			rt;
+
+	int (*prepare_crypt_hardware)(struct crypto_engine *engine);
+	int (*unprepare_crypt_hardware)(struct crypto_engine *engine);
+
+	int (*prepare_request)(struct crypto_engine *engine,
+			       struct ablkcipher_request *req);
+	int (*unprepare_request)(struct crypto_engine *engine,
+				 struct ablkcipher_request *req);
+	int (*crypt_one_request)(struct crypto_engine *engine,
+				 struct ablkcipher_request *req);
+
+	struct kthread_worker           kworker;
+	struct task_struct              *kworker_task;
+	struct kthread_work             pump_requests;
+
+	void				*priv_data;
+	struct ablkcipher_request	*cur_req;
+};
+
+int crypto_transfer_request(struct crypto_engine *engine,
+			    struct ablkcipher_request *req, bool need_pump);
+int crypto_transfer_request_to_engine(struct crypto_engine *engine,
+				      struct ablkcipher_request *req);
+void crypto_finalize_request(struct crypto_engine *engine,
+			     struct ablkcipher_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 */