projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 2589ad84 CL |
1 | /* |
| 2 | * Crypto engine API | |
| 3 | * | |
| 4 | * Copyright (c) 2016 Baolin Wang <baolin.wang@linaro.org> | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify it | |
| 7 | * under the terms of the GNU General Public License as published by the Free | |
| 8 | * Software Foundation; either version 2 of the License, or (at your option) | |
| 9 | * any later version. | |
| 10 | * | |
| 11 | */ | |
| 12 | #ifndef _CRYPTO_ENGINE_H | |
| 13 | #define _CRYPTO_ENGINE_H | |
| 14 | ||
| 15 | #include <linux/crypto.h> | |
| 16 | #include <linux/list.h> | |
| 17 | #include <linux/kernel.h> | |
| 18 | #include <linux/kthread.h> | |
| 19 | #include <crypto/algapi.h> | |
| 4cba7cf0 | 20 | #include <crypto/hash.h> |
| 2589ad84 CL |
21 | |
| 22 | #define ENGINE_NAME_LEN 30 | |
| 23 | /* | |
| 24 | * struct crypto_engine - crypto hardware engine | |
| 25 | * @name: the engine name | |
| 26 | * @idling: the engine is entering idle state | |
| 27 | * @busy: request pump is busy | |
| 28 | * @running: the engine is on working | |
| 29 | * @cur_req_prepared: current request is prepared | |
| 30 | * @list: link with the global crypto engine list | |
| 31 | * @queue_lock: spinlock to syncronise access to request queue | |
| 32 | * @queue: the crypto queue of the engine | |
| 33 | * @rt: whether this queue is set to run as a realtime task | |
| 34 | * @prepare_crypt_hardware: a request will soon arrive from the queue | |
| 35 | * so the subsystem requests the driver to prepare the hardware | |
| 36 | * by issuing this call | |
| 37 | * @unprepare_crypt_hardware: there are currently no more requests on the | |
| 38 | * queue so the subsystem notifies the driver that it may relax the | |
| 39 | * hardware by issuing this call | |
| 4cba7cf0 CL |
40 | * @prepare_cipher_request: do some prepare if need before handle the current request |
| 41 | * @unprepare_cipher_request: undo any work done by prepare_cipher_request() | |
| 42 | * @cipher_one_request: do encryption for current request | |
| 43 | * @prepare_hash_request: do some prepare if need before handle the current request | |
| 44 | * @unprepare_hash_request: undo any work done by prepare_hash_request() | |
| 45 | * @hash_one_request: do hash for current request | |
| c4ca2b0b | 46 | * @kworker: kthread worker struct for request pump |
| 2589ad84 CL |
47 | * @pump_requests: work struct for scheduling work to the request pump |
| 48 | * @priv_data: the engine private data | |
| 49 | * @cur_req: the current request which is on processing | |
| 50 | */ | |
| 51 | struct crypto_engine { | |
| 52 | char name[ENGINE_NAME_LEN]; | |
| 53 | bool idling; | |
| 54 | bool busy; | |
| 55 | bool running; | |
| 56 | bool cur_req_prepared; | |
| 57 | ||
| 58 | struct list_head list; | |
| 59 | spinlock_t queue_lock; | |
| 60 | struct crypto_queue queue; | |
| 88d58ef8 | 61 | struct device *dev; |
| 2589ad84 CL |
62 | |
| 63 | bool rt; | |
| 64 | ||
| 65 | int (*prepare_crypt_hardware)(struct crypto_engine *engine); | |
| 66 | int (*unprepare_crypt_hardware)(struct crypto_engine *engine); | |
| 67 | ||
| 4cba7cf0 CL |
68 | int (*prepare_cipher_request)(struct crypto_engine *engine, |
| 69 | struct ablkcipher_request *req); | |
| 70 | int (*unprepare_cipher_request)(struct crypto_engine *engine, | |
| 71 | struct ablkcipher_request *req); | |
| 72 | int (*prepare_hash_request)(struct crypto_engine *engine, | |
| 73 | struct ahash_request *req); | |
| 74 | int (*unprepare_hash_request)(struct crypto_engine *engine, | |
| 75 | struct ahash_request *req); | |
| 76 | int (*cipher_one_request)(struct crypto_engine *engine, | |
| 77 | struct ablkcipher_request *req); | |
| 78 | int (*hash_one_request)(struct crypto_engine *engine, | |
| 79 | struct ahash_request *req); | |
| 2589ad84 | 80 | |
| c4ca2b0b | 81 | struct kthread_worker *kworker; |
| 2589ad84 CL |
82 | struct kthread_work pump_requests; |
| 83 | ||
| 84 | void *priv_data; | |
| 4cba7cf0 | 85 | struct crypto_async_request *cur_req; |
| 2589ad84 CL |
86 | }; |
| 87 | ||
| 4cba7cf0 CL |
88 | int crypto_transfer_cipher_request(struct crypto_engine *engine, |
| 89 | struct ablkcipher_request *req, | |
| 90 | bool need_pump); | |
| 91 | int crypto_transfer_cipher_request_to_engine(struct crypto_engine *engine, | |
| 92 | struct ablkcipher_request *req); | |
| 93 | int crypto_transfer_hash_request(struct crypto_engine *engine, | |
| 94 | struct ahash_request *req, bool need_pump); | |
| 95 | int crypto_transfer_hash_request_to_engine(struct crypto_engine *engine, | |
| 96 | struct ahash_request *req); | |
| 97 | void crypto_finalize_cipher_request(struct crypto_engine *engine, | |
| 98 | struct ablkcipher_request *req, int err); | |
| 99 | void crypto_finalize_hash_request(struct crypto_engine *engine, | |
| 100 | struct ahash_request *req, int err); | |
| 2589ad84 CL |
101 | int crypto_engine_start(struct crypto_engine *engine); |
| 102 | int crypto_engine_stop(struct crypto_engine *engine); | |
| 103 | struct crypto_engine *crypto_engine_alloc_init(struct device *dev, bool rt); | |
| 104 | int crypto_engine_exit(struct crypto_engine *engine); | |
| 105 | ||
| 106 | #endif /* _CRYPTO_ENGINE_H */ |