1 files changed, 70 insertions, 0 deletions

diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h
index 4f861c44d066..b09d43f612e1 100644
--- a/include/crypto/algapi.h
+++ b/include/crypto/algapi.h
@@ -15,6 +15,7 @@
 #include <linux/crypto.h>
 #include <linux/list.h>
 #include <linux/kernel.h>
+#include <linux/kthread.h>
 #include <linux/skbuff.h>
 
 struct crypto_aead;
@@ -128,6 +129,75 @@ struct ablkcipher_walk {
         unsigned int            blocksize;
 };
 
+#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);
+
 extern const struct crypto_type crypto_ablkcipher_type;
 extern const struct crypto_type crypto_blkcipher_type;