projects/linux·blob v4.4 · refs

112 lines · 2.3 KiB

1/*
2 * Software async multibuffer crypto daemon headers
3 *
4 * Author:
5 * Tim Chen <[email protected]>
6 *
7 * Copyright (c) 2014, Intel Corporation.
8 */
9
10#ifndef _CRYPTO_MCRYPT_H
11#define _CRYPTO_MCRYPT_H
12
13#include <linux/crypto.h>
14#include <linux/kernel.h>
15#include <crypto/hash.h>
16
17struct mcryptd_ahash {
18 struct crypto_ahash base;
19};
20
21static inline struct mcryptd_ahash *__mcryptd_ahash_cast(
22 struct crypto_ahash *tfm)
23{
24 return (struct mcryptd_ahash *)tfm;
25}
26
27struct mcryptd_cpu_queue {
28 struct crypto_queue queue;
29 struct work_struct work;
30};
31
32struct mcryptd_queue {
33 struct mcryptd_cpu_queue __percpu *cpu_queue;
34};
35
36struct mcryptd_instance_ctx {
37 struct crypto_spawn spawn;
38 struct mcryptd_queue *queue;
39};
40
41struct mcryptd_hash_ctx {
42 struct crypto_shash *child;
43 struct mcryptd_alg_state *alg_state;
44};
45
46struct mcryptd_tag {
47 /* seq number of request */
48 unsigned seq_num;
49 /* arrival time of request */
50 unsigned long arrival;
51 unsigned long expire;
52 int cpu;
53};
54
55struct mcryptd_hash_request_ctx {
56 struct list_head waiter;
57 crypto_completion_t complete;
58 struct mcryptd_tag tag;
59 struct crypto_hash_walk walk;
60 u8 *out;
61 int flag;
62 struct shash_desc desc;
63};
64
65struct mcryptd_ahash *mcryptd_alloc_ahash(const char *alg_name,
66 u32 type, u32 mask);
67struct crypto_shash *mcryptd_ahash_child(struct mcryptd_ahash *tfm);
68struct shash_desc *mcryptd_shash_desc(struct ahash_request *req);
69void mcryptd_free_ahash(struct mcryptd_ahash *tfm);
70void mcryptd_flusher(struct work_struct *work);
71
72enum mcryptd_req_type {
73 MCRYPTD_NONE,
74 MCRYPTD_UPDATE,
75 MCRYPTD_FINUP,
76 MCRYPTD_DIGEST,
77 MCRYPTD_FINAL
78};
79
80struct mcryptd_alg_cstate {
81 unsigned long next_flush;
82 unsigned next_seq_num;
83 bool flusher_engaged;
84 struct delayed_work flush;
85 int cpu;
86 struct mcryptd_alg_state *alg_state;
87 void *mgr;
88 spinlock_t work_lock;
89 struct list_head work_list;
90 struct list_head flush_list;
91};
92
93struct mcryptd_alg_state {
94 struct mcryptd_alg_cstate __percpu *alg_cstate;
95 unsigned long (*flusher)(struct mcryptd_alg_cstate *cstate);
96};
97
98/* return delay in jiffies from current time */
99static inline unsigned long get_delay(unsigned long t)
100{
101 long delay;
102
103 delay = (long) t - (long) jiffies;
104 if (delay <= 0)
105 return 0;
106 else
107 return (unsigned long) delay;
108}
109
110void mcryptd_arm_flusher(struct mcryptd_alg_cstate *cstate, unsigned long delay);
111
112#endif