diff options
author | Michael Buesch <mb@bu3sch.de> | 2006-06-26 03:24:59 -0400 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-26 12:58:19 -0400 |
commit | 844dd05fec172d98b0dacecd9b9e9f6595204c13 (patch) | |
tree | a62ebcbd314ed4be35c233eb6a5eba414493a50f /include | |
parent | 59f5d35f83738bf07e66f8cdcff32a433df804a3 (diff) |
[PATCH] Add new generic HW RNG core
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/hw_random.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/include/linux/hw_random.h b/include/linux/hw_random.h new file mode 100644 index 000000000000..21ea7610e177 --- /dev/null +++ b/include/linux/hw_random.h | |||
@@ -0,0 +1,50 @@ | |||
1 | /* | ||
2 | Hardware Random Number Generator | ||
3 | |||
4 | Please read Documentation/hw_random.txt for details on use. | ||
5 | |||
6 | ---------------------------------------------------------- | ||
7 | This software may be used and distributed according to the terms | ||
8 | of the GNU General Public License, incorporated herein by reference. | ||
9 | |||
10 | */ | ||
11 | |||
12 | #ifndef LINUX_HWRANDOM_H_ | ||
13 | #define LINUX_HWRANDOM_H_ | ||
14 | #ifdef __KERNEL__ | ||
15 | |||
16 | #include <linux/types.h> | ||
17 | #include <linux/list.h> | ||
18 | |||
19 | /** | ||
20 | * struct hwrng - Hardware Random Number Generator driver | ||
21 | * @name: Unique RNG name. | ||
22 | * @init: Initialization callback (can be NULL). | ||
23 | * @cleanup: Cleanup callback (can be NULL). | ||
24 | * @data_present: Callback to determine if data is available | ||
25 | * on the RNG. If NULL, it is assumed that | ||
26 | * there is always data available. | ||
27 | * @data_read: Read data from the RNG device. | ||
28 | * Returns the number of lower random bytes in "data". | ||
29 | * Must not be NULL. | ||
30 | * @priv: Private data, for use by the RNG driver. | ||
31 | */ | ||
32 | struct hwrng { | ||
33 | const char *name; | ||
34 | int (*init)(struct hwrng *rng); | ||
35 | void (*cleanup)(struct hwrng *rng); | ||
36 | int (*data_present)(struct hwrng *rng); | ||
37 | int (*data_read)(struct hwrng *rng, u32 *data); | ||
38 | unsigned long priv; | ||
39 | |||
40 | /* internal. */ | ||
41 | struct list_head list; | ||
42 | }; | ||
43 | |||
44 | /** Register a new Hardware Random Number Generator driver. */ | ||
45 | extern int hwrng_register(struct hwrng *rng); | ||
46 | /** Unregister a Hardware Random Number Generator driver. */ | ||
47 | extern void hwrng_unregister(struct hwrng *rng); | ||
48 | |||
49 | #endif /* __KERNEL__ */ | ||
50 | #endif /* LINUX_HWRANDOM_H_ */ | ||