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Introduce "hcall" pointer to indicate pending hypercall.
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1/*
2 * Cryptographic API.
3 *
4 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
5cb1454b 5 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
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6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation; either version 2 of the License, or (at your option)
10 * any later version.
11 *
12 */
13#ifndef _CRYPTO_INTERNAL_H
14#define _CRYPTO_INTERNAL_H
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15
16#include <crypto/algapi.h>
2825982d 17#include <linux/completion.h>
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18#include <linux/mm.h>
19#include <linux/highmem.h>
20#include <linux/interrupt.h>
21#include <linux/init.h>
5cb1454b 22#include <linux/list.h>
4cc7720c 23#include <linux/module.h>
fbdae9f3 24#include <linux/kernel.h>
2825982d 25#include <linux/notifier.h>
5cb1454b 26#include <linux/rwsem.h>
64baf3cf 27#include <linux/slab.h>
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28#include <asm/kmap_types.h>
29
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30/* Crypto notification events. */
31enum {
32 CRYPTO_MSG_ALG_REQUEST,
33 CRYPTO_MSG_ALG_REGISTER,
34 CRYPTO_MSG_ALG_UNREGISTER,
35 CRYPTO_MSG_TMPL_REGISTER,
36 CRYPTO_MSG_TMPL_UNREGISTER,
37};
38
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39struct crypto_instance;
40struct crypto_template;
41
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42struct crypto_larval {
43 struct crypto_alg alg;
44 struct crypto_alg *adult;
45 struct completion completion;
492e2b63 46 u32 mask;
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47};
48
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49extern struct list_head crypto_alg_list;
50extern struct rw_semaphore crypto_alg_sem;
2825982d 51extern struct blocking_notifier_head crypto_chain;
5cb1454b 52
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53static inline enum km_type crypto_kmap_type(int out)
54{
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55 enum km_type type;
56
57 if (in_softirq())
58 type = out * (KM_SOFTIRQ1 - KM_SOFTIRQ0) + KM_SOFTIRQ0;
59 else
60 type = out * (KM_USER1 - KM_USER0) + KM_USER0;
61
62 return type;
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63}
64
65static inline void *crypto_kmap(struct page *page, int out)
66{
67 return kmap_atomic(page, crypto_kmap_type(out));
68}
69
70static inline void crypto_kunmap(void *vaddr, int out)
71{
72 kunmap_atomic(vaddr, crypto_kmap_type(out));
73}
74
8f21cf0d 75static inline void crypto_yield(u32 flags)
1da177e4 76{
8f21cf0d 77 if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
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78 cond_resched();
79}
80
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81#ifdef CONFIG_PROC_FS
82void __init crypto_init_proc(void);
cce9e06d 83void __exit crypto_exit_proc(void);
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84#else
85static inline void crypto_init_proc(void)
86{ }
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87static inline void crypto_exit_proc(void)
88{ }
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89#endif
90
f1ddcaf3 91static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg)
fbdae9f3 92{
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93 unsigned int len = alg->cra_ctxsize;
94
95 if (alg->cra_alignmask) {
96 len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
97 len += alg->cra_digest.dia_digestsize;
98 }
99
100 return len;
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101}
102
f1ddcaf3 103static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
fbdae9f3 104{
f1ddcaf3 105 return alg->cra_ctxsize;
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106}
107
f1ddcaf3 108static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
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109{
110 return alg->cra_ctxsize;
111}
112
2825982d 113struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
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114struct crypto_alg *__crypto_alg_lookup(const char *name, u32 type, u32 mask);
115struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
2825982d 116
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117int crypto_init_digest_ops(struct crypto_tfm *tfm);
118int crypto_init_cipher_ops(struct crypto_tfm *tfm);
119int crypto_init_compress_ops(struct crypto_tfm *tfm);
120
121void crypto_exit_digest_ops(struct crypto_tfm *tfm);
122void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
123void crypto_exit_compress_ops(struct crypto_tfm *tfm);
124
492e2b63 125void crypto_larval_error(const char *name, u32 type, u32 mask);
2825982d 126
6bfd4809 127void crypto_shoot_alg(struct crypto_alg *alg);
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128struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
129 u32 mask);
6bfd4809 130
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131int crypto_register_instance(struct crypto_template *tmpl,
132 struct crypto_instance *inst);
133
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134int crypto_register_notifier(struct notifier_block *nb);
135int crypto_unregister_notifier(struct notifier_block *nb);
136
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137static inline void crypto_alg_put(struct crypto_alg *alg)
138{
139 if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
140 alg->cra_destroy(alg);
141}
142
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143static inline int crypto_tmpl_get(struct crypto_template *tmpl)
144{
145 return try_module_get(tmpl->module);
146}
147
148static inline void crypto_tmpl_put(struct crypto_template *tmpl)
149{
150 module_put(tmpl->module);
151}
152
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153static inline int crypto_is_larval(struct crypto_alg *alg)
154{
155 return alg->cra_flags & CRYPTO_ALG_LARVAL;
156}
157
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158static inline int crypto_is_dead(struct crypto_alg *alg)
159{
160 return alg->cra_flags & CRYPTO_ALG_DEAD;
161}
162
163static inline int crypto_is_moribund(struct crypto_alg *alg)
164{
165 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
166}
167
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168static inline int crypto_notify(unsigned long val, void *v)
169{
170 return blocking_notifier_call_chain(&crypto_chain, val, v);
171}
172
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173#endif /* _CRYPTO_INTERNAL_H */
174