1 /* SPDX-License-Identifier: GPL-2.0-or-later * <<
2 /* 1 /*
3 * Crypto engine API 2 * Crypto engine API
4 * 3 *
5 * Copyright (c) 2016 Baolin Wang <baolin.wang 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 *
6 */ 11 */
7 #ifndef _CRYPTO_ENGINE_H 12 #ifndef _CRYPTO_ENGINE_H
8 #define _CRYPTO_ENGINE_H 13 #define _CRYPTO_ENGINE_H
9 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>
10 #include <crypto/aead.h> 20 #include <crypto/aead.h>
11 #include <crypto/akcipher.h> 21 #include <crypto/akcipher.h>
12 #include <crypto/hash.h> 22 #include <crypto/hash.h>
13 #include <crypto/kpp.h> <<
14 #include <crypto/skcipher.h> 23 #include <crypto/skcipher.h>
15 #include <linux/types.h> <<
16 24
17 struct crypto_engine; !! 25 #define ENGINE_NAME_LEN 30
18 struct device; !! 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
>> 43 * @kworker: kthread worker struct for request pump
>> 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;
>> 58 struct device *dev;
>> 59
>> 60 bool rt;
>> 61
>> 62 int (*prepare_crypt_hardware)(struct crypto_engine *engine);
>> 63 int (*unprepare_crypt_hardware)(struct crypto_engine *engine);
>> 64
>> 65 struct kthread_worker *kworker;
>> 66 struct kthread_work pump_requests;
>> 67
>> 68 void *priv_data;
>> 69 struct crypto_async_request *cur_req;
>> 70 };
19 71
20 /* 72 /*
21 * struct crypto_engine_op - crypto hardware e 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()
22 * @do_one_request: do encryption for current 76 * @do_one_request: do encryption for current request
23 */ 77 */
24 struct crypto_engine_op { 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);
25 int (*do_one_request)(struct crypto_en 83 int (*do_one_request)(struct crypto_engine *engine,
26 void *areq); 84 void *areq);
27 }; 85 };
28 86
29 struct aead_engine_alg { !! 87 struct crypto_engine_ctx {
30 struct aead_alg base; <<
31 struct crypto_engine_op op; <<
32 }; <<
33 <<
34 struct ahash_engine_alg { <<
35 struct ahash_alg base; <<
36 struct crypto_engine_op op; <<
37 }; <<
38 <<
39 struct akcipher_engine_alg { <<
40 struct akcipher_alg base; <<
41 struct crypto_engine_op op; <<
42 }; <<
43 <<
44 struct kpp_engine_alg { <<
45 struct kpp_alg base; <<
46 struct crypto_engine_op op; <<
47 }; <<
48 <<
49 struct skcipher_engine_alg { <<
50 struct skcipher_alg base; <<
51 struct crypto_engine_op op; 88 struct crypto_engine_op op;
52 }; 89 };
53 90
>> 91 int crypto_transfer_ablkcipher_request_to_engine(struct crypto_engine *engine,
>> 92 struct ablkcipher_request *req);
54 int crypto_transfer_aead_request_to_engine(str 93 int crypto_transfer_aead_request_to_engine(struct crypto_engine *engine,
55 str 94 struct aead_request *req);
56 int crypto_transfer_akcipher_request_to_engine 95 int crypto_transfer_akcipher_request_to_engine(struct crypto_engine *engine,
57 96 struct akcipher_request *req);
58 int crypto_transfer_hash_request_to_engine(str 97 int crypto_transfer_hash_request_to_engine(struct crypto_engine *engine,
59 98 struct ahash_request *req);
60 int crypto_transfer_kpp_request_to_engine(stru <<
61 stru <<
62 int crypto_transfer_skcipher_request_to_engine 99 int crypto_transfer_skcipher_request_to_engine(struct crypto_engine *engine,
63 100 struct skcipher_request *req);
>> 101 void crypto_finalize_ablkcipher_request(struct crypto_engine *engine,
>> 102 struct ablkcipher_request *req, int err);
64 void crypto_finalize_aead_request(struct crypt 103 void crypto_finalize_aead_request(struct crypto_engine *engine,
65 struct aead_ 104 struct aead_request *req, int err);
66 void crypto_finalize_akcipher_request(struct c 105 void crypto_finalize_akcipher_request(struct crypto_engine *engine,
67 struct a 106 struct akcipher_request *req, int err);
68 void crypto_finalize_hash_request(struct crypt 107 void crypto_finalize_hash_request(struct crypto_engine *engine,
69 struct ahash 108 struct ahash_request *req, int err);
70 void crypto_finalize_kpp_request(struct crypto <<
71 struct kpp_re <<
72 void crypto_finalize_skcipher_request(struct c 109 void crypto_finalize_skcipher_request(struct crypto_engine *engine,
73 struct s 110 struct skcipher_request *req, int err);
74 int crypto_engine_start(struct crypto_engine * 111 int crypto_engine_start(struct crypto_engine *engine);
75 int crypto_engine_stop(struct crypto_engine *e 112 int crypto_engine_stop(struct crypto_engine *engine);
76 struct crypto_engine *crypto_engine_alloc_init 113 struct crypto_engine *crypto_engine_alloc_init(struct device *dev, bool rt);
77 struct crypto_engine *crypto_engine_alloc_init !! 114 int crypto_engine_exit(struct crypto_engine *engine);
78 <<
79 <<
80 <<
81 void crypto_engine_exit(struct crypto_engine * <<
82 <<
83 int crypto_engine_register_aead(struct aead_en <<
84 void crypto_engine_unregister_aead(struct aead <<
85 int crypto_engine_register_aeads(struct aead_e <<
86 void crypto_engine_unregister_aeads(struct aea <<
87 <<
88 int crypto_engine_register_ahash(struct ahash_ <<
89 void crypto_engine_unregister_ahash(struct aha <<
90 int crypto_engine_register_ahashes(struct ahas <<
91 void crypto_engine_unregister_ahashes(struct a <<
92 int coun <<
93 <<
94 int crypto_engine_register_akcipher(struct akc <<
95 void crypto_engine_unregister_akcipher(struct <<
96 <<
97 int crypto_engine_register_kpp(struct kpp_engi <<
98 void crypto_engine_unregister_kpp(struct kpp_e <<
99 <<
100 int crypto_engine_register_skcipher(struct skc <<
101 void crypto_engine_unregister_skcipher(struct <<
102 int crypto_engine_register_skciphers(struct sk <<
103 int count <<
104 void crypto_engine_unregister_skciphers(struct <<
105 int co <<
106 115
107 #endif /* _CRYPTO_ENGINE_H */ 116 #endif /* _CRYPTO_ENGINE_H */
108 117
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