projects / linux-2.6-block.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> | |
| 218d1cc1 CL |
20 | #include <crypto/aead.h> |
| 21 | #include <crypto/akcipher.h> | |
| 4cba7cf0 | 22 | #include <crypto/hash.h> |
| 218d1cc1 | 23 | #include <crypto/skcipher.h> |
| 2589ad84 CL |
24 | |
| 25 | #define ENGINE_NAME_LEN 30 | |
| 26 | /* | |
| 27 | * struct crypto_engine - crypto hardware engine | |
| 28 | * @name: the engine name | |
| 29 | * @idling: the engine is entering idle state | |
| 30 | * @busy: request pump is busy | |
| 31 | * @running: the engine is on working | |
| 32 | * @cur_req_prepared: current request is prepared | |
| 33 | * @list: link with the global crypto engine list | |
| 34 | * @queue_lock: spinlock to syncronise access to request queue | |
| 35 | * @queue: the crypto queue of the engine | |
| 36 | * @rt: whether this queue is set to run as a realtime task | |
| 37 | * @prepare_crypt_hardware: a request will soon arrive from the queue | |
| 38 | * so the subsystem requests the driver to prepare the hardware | |
| 39 | * by issuing this call | |
| 40 | * @unprepare_crypt_hardware: there are currently no more requests on the | |
| 41 | * queue so the subsystem notifies the driver that it may relax the | |
| 42 | * hardware by issuing this call | |
| c4ca2b0b | 43 | * @kworker: kthread worker struct for request pump |
| 2589ad84 CL |
44 | * @pump_requests: work struct for scheduling work to the request pump |
| 45 | * @priv_data: the engine private data | |
| 46 | * @cur_req: the current request which is on processing | |
| 47 | */ | |
| 48 | struct crypto_engine { | |
| 49 | char name[ENGINE_NAME_LEN]; | |
| 50 | bool idling; | |
| 51 | bool busy; | |
| 52 | bool running; | |
| 53 | bool cur_req_prepared; | |
| 54 | ||
| 55 | struct list_head list; | |
| 56 | spinlock_t queue_lock; | |
| 57 | struct crypto_queue queue; | |
| 88d58ef8 | 58 | struct device *dev; |
| 2589ad84 CL |
59 | |
| 60 | bool rt; | |
| 61 | ||
| 62 | int (*prepare_crypt_hardware)(struct crypto_engine *engine); | |
| 63 | int (*unprepare_crypt_hardware)(struct crypto_engine *engine); | |
| 64 | ||
| c4ca2b0b | 65 | struct kthread_worker *kworker; |
| 2589ad84 CL |
66 | struct kthread_work pump_requests; |
| 67 | ||
| 68 | void *priv_data; | |
| 4cba7cf0 | 69 | struct crypto_async_request *cur_req; |
| 2589ad84 CL |
70 | }; |
| 71 | ||
| 218d1cc1 CL |
72 | /* |
| 73 | * struct crypto_engine_op - crypto hardware engine operations | |
| 74 | * @prepare__request: do some prepare if need before handle the current request | |
| 75 | * @unprepare_request: undo any work done by prepare_request() | |
| 76 | * @do_one_request: do encryption for current request | |
| 77 | */ | |
| 78 | struct crypto_engine_op { | |
| 79 | int (*prepare_request)(struct crypto_engine *engine, | |
| 80 | void *areq); | |
| 81 | int (*unprepare_request)(struct crypto_engine *engine, | |
| 82 | void *areq); | |
| 83 | int (*do_one_request)(struct crypto_engine *engine, | |
| 84 | void *areq); | |
| 85 | }; | |
| 86 | ||
| 87 | struct crypto_engine_ctx { | |
| 88 | struct crypto_engine_op op; | |
| 89 | }; | |
| 90 | ||
| 91 | int crypto_transfer_ablkcipher_request_to_engine(struct crypto_engine *engine, | |
| 92 | struct ablkcipher_request *req); | |
| 93 | int crypto_transfer_aead_request_to_engine(struct crypto_engine *engine, | |
| 94 | struct aead_request *req); | |
| 95 | int crypto_transfer_akcipher_request_to_engine(struct crypto_engine *engine, | |
| 96 | struct akcipher_request *req); | |
| 4cba7cf0 | 97 | int crypto_transfer_hash_request_to_engine(struct crypto_engine *engine, |
| 218d1cc1 CL |
98 | struct ahash_request *req); |
| 99 | int crypto_transfer_skcipher_request_to_engine(struct crypto_engine *engine, | |
| 100 | struct skcipher_request *req); | |
| 101 | void crypto_finalize_ablkcipher_request(struct crypto_engine *engine, | |
| 102 | struct ablkcipher_request *req, int err); | |
| 103 | void crypto_finalize_aead_request(struct crypto_engine *engine, | |
| 104 | struct aead_request *req, int err); | |
| 105 | void crypto_finalize_akcipher_request(struct crypto_engine *engine, | |
| 106 | struct akcipher_request *req, int err); | |
| 4cba7cf0 CL |
107 | void crypto_finalize_hash_request(struct crypto_engine *engine, |
| 108 | struct ahash_request *req, int err); | |
| 218d1cc1 CL |
109 | void crypto_finalize_skcipher_request(struct crypto_engine *engine, |
| 110 | struct skcipher_request *req, int err); | |
| 2589ad84 CL |
111 | int crypto_engine_start(struct crypto_engine *engine); |
| 112 | int crypto_engine_stop(struct crypto_engine *engine); | |
| 113 | struct crypto_engine *crypto_engine_alloc_init(struct device *dev, bool rt); | |
| 114 | int crypto_engine_exit(struct crypto_engine *engine); | |
| 115 | ||
| 116 | #endif /* _CRYPTO_ENGINE_H */ |