]>
Commit | Line | Data |
---|---|---|
2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
2589ad84 CL |
2 | /* |
3 | * Crypto engine API | |
4 | * | |
5 | * Copyright (c) 2016 Baolin Wang <baolin.wang@linaro.org> | |
2589ad84 CL |
6 | */ |
7 | #ifndef _CRYPTO_ENGINE_H | |
8 | #define _CRYPTO_ENGINE_H | |
9 | ||
10 | #include <linux/crypto.h> | |
11 | #include <linux/list.h> | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/kthread.h> | |
14 | #include <crypto/algapi.h> | |
218d1cc1 CL |
15 | #include <crypto/aead.h> |
16 | #include <crypto/akcipher.h> | |
4cba7cf0 | 17 | #include <crypto/hash.h> |
218d1cc1 | 18 | #include <crypto/skcipher.h> |
2589ad84 CL |
19 | |
20 | #define ENGINE_NAME_LEN 30 | |
21 | /* | |
22 | * struct crypto_engine - crypto hardware engine | |
23 | * @name: the engine name | |
24 | * @idling: the engine is entering idle state | |
25 | * @busy: request pump is busy | |
26 | * @running: the engine is on working | |
27 | * @cur_req_prepared: current request is prepared | |
28 | * @list: link with the global crypto engine list | |
29 | * @queue_lock: spinlock to syncronise access to request queue | |
30 | * @queue: the crypto queue of the engine | |
31 | * @rt: whether this queue is set to run as a realtime task | |
32 | * @prepare_crypt_hardware: a request will soon arrive from the queue | |
33 | * so the subsystem requests the driver to prepare the hardware | |
34 | * by issuing this call | |
35 | * @unprepare_crypt_hardware: there are currently no more requests on the | |
36 | * queue so the subsystem notifies the driver that it may relax the | |
37 | * hardware by issuing this call | |
c4ca2b0b | 38 | * @kworker: kthread worker struct for request pump |
2589ad84 CL |
39 | * @pump_requests: work struct for scheduling work to the request pump |
40 | * @priv_data: the engine private data | |
41 | * @cur_req: the current request which is on processing | |
42 | */ | |
43 | struct crypto_engine { | |
44 | char name[ENGINE_NAME_LEN]; | |
45 | bool idling; | |
46 | bool busy; | |
47 | bool running; | |
48 | bool cur_req_prepared; | |
49 | ||
50 | struct list_head list; | |
51 | spinlock_t queue_lock; | |
52 | struct crypto_queue queue; | |
88d58ef8 | 53 | struct device *dev; |
2589ad84 CL |
54 | |
55 | bool rt; | |
56 | ||
57 | int (*prepare_crypt_hardware)(struct crypto_engine *engine); | |
58 | int (*unprepare_crypt_hardware)(struct crypto_engine *engine); | |
59 | ||
c4ca2b0b | 60 | struct kthread_worker *kworker; |
2589ad84 CL |
61 | struct kthread_work pump_requests; |
62 | ||
63 | void *priv_data; | |
4cba7cf0 | 64 | struct crypto_async_request *cur_req; |
2589ad84 CL |
65 | }; |
66 | ||
218d1cc1 CL |
67 | /* |
68 | * struct crypto_engine_op - crypto hardware engine operations | |
69 | * @prepare__request: do some prepare if need before handle the current request | |
70 | * @unprepare_request: undo any work done by prepare_request() | |
71 | * @do_one_request: do encryption for current request | |
72 | */ | |
73 | struct crypto_engine_op { | |
74 | int (*prepare_request)(struct crypto_engine *engine, | |
75 | void *areq); | |
76 | int (*unprepare_request)(struct crypto_engine *engine, | |
77 | void *areq); | |
78 | int (*do_one_request)(struct crypto_engine *engine, | |
79 | void *areq); | |
80 | }; | |
81 | ||
82 | struct crypto_engine_ctx { | |
83 | struct crypto_engine_op op; | |
84 | }; | |
85 | ||
86 | int crypto_transfer_ablkcipher_request_to_engine(struct crypto_engine *engine, | |
87 | struct ablkcipher_request *req); | |
88 | int crypto_transfer_aead_request_to_engine(struct crypto_engine *engine, | |
89 | struct aead_request *req); | |
90 | int crypto_transfer_akcipher_request_to_engine(struct crypto_engine *engine, | |
91 | struct akcipher_request *req); | |
4cba7cf0 | 92 | int crypto_transfer_hash_request_to_engine(struct crypto_engine *engine, |
218d1cc1 CL |
93 | struct ahash_request *req); |
94 | int crypto_transfer_skcipher_request_to_engine(struct crypto_engine *engine, | |
95 | struct skcipher_request *req); | |
96 | void crypto_finalize_ablkcipher_request(struct crypto_engine *engine, | |
97 | struct ablkcipher_request *req, int err); | |
98 | void crypto_finalize_aead_request(struct crypto_engine *engine, | |
99 | struct aead_request *req, int err); | |
100 | void crypto_finalize_akcipher_request(struct crypto_engine *engine, | |
101 | struct akcipher_request *req, int err); | |
4cba7cf0 CL |
102 | void crypto_finalize_hash_request(struct crypto_engine *engine, |
103 | struct ahash_request *req, int err); | |
218d1cc1 CL |
104 | void crypto_finalize_skcipher_request(struct crypto_engine *engine, |
105 | struct skcipher_request *req, int err); | |
2589ad84 CL |
106 | int crypto_engine_start(struct crypto_engine *engine); |
107 | int crypto_engine_stop(struct crypto_engine *engine); | |
108 | struct crypto_engine *crypto_engine_alloc_init(struct device *dev, bool rt); | |
109 | int crypto_engine_exit(struct crypto_engine *engine); | |
110 | ||
111 | #endif /* _CRYPTO_ENGINE_H */ |