tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Cryptographic API.
3 *
4 * Support for VIA PadLock hardware crypto engine.
5 *
6 * Copyright (c) 2004 Michal Ludvig <michal@logix.cz>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
14#include <linux/module.h>
15#include <linux/init.h>
16#include <linux/types.h>
17#include <linux/errno.h>
18#include <linux/crypto.h>
19#include <asm/byteorder.h>
20#include "padlock.h"
21
22static int __init
23padlock_init(void)
24{
25 int ret = -ENOSYS;
26
27 if (!cpu_has_xcrypt) {
28 printk(KERN_ERR PFX "VIA PadLock not detected.\n");
29 return -ENODEV;
30 }
31
32 if (!cpu_has_xcrypt_enabled) {
33 printk(KERN_ERR PFX "VIA PadLock detected, but not enabled. Hmm, strange...\n");
34 return -ENODEV;
35 }
36
37#ifdef CONFIG_CRYPTO_DEV_PADLOCK_AES
38 if ((ret = padlock_init_aes())) {
39 printk(KERN_ERR PFX "VIA PadLock AES initialization failed.\n");
40 return ret;
41 }
42#endif
43
44 if (ret == -ENOSYS)
45 printk(KERN_ERR PFX "Hmm, VIA PadLock was compiled without any algorithm.\n");
46
47 return ret;
48}
49
50static void __exit
51padlock_fini(void)
52{
53#ifdef CONFIG_CRYPTO_DEV_PADLOCK_AES
54 padlock_fini_aes();
55#endif
56}
57
58module_init(padlock_init);
59module_exit(padlock_fini);
60
61MODULE_DESCRIPTION("VIA PadLock crypto engine support.");
62MODULE_LICENSE("Dual BSD/GPL");
63MODULE_AUTHOR("Michal Ludvig");