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author | Michael Buesch <mb@bu3sch.de> | 2006-06-26 00:24:59 -0700 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-26 09:58:19 -0700 |
commit | 844dd05fec172d98b0dacecd9b9e9f6595204c13 (patch) | |
tree | a62ebcbd314ed4be35c233eb6a5eba414493a50f /include/linux/hw_random.h | |
parent | 59f5d35f83738bf07e66f8cdcff32a433df804a3 (diff) | |
download | linux-stable-844dd05fec172d98b0dacecd9b9e9f6595204c13.tar.gz linux-stable-844dd05fec172d98b0dacecd9b9e9f6595204c13.tar.bz2 linux-stable-844dd05fec172d98b0dacecd9b9e9f6595204c13.zip |
[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/linux/hw_random.h')
-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 @@ +/* + Hardware Random Number Generator + + Please read Documentation/hw_random.txt for details on use. + + ---------------------------------------------------------- + This software may be used and distributed according to the terms + of the GNU General Public License, incorporated herein by reference. + + */ + +#ifndef LINUX_HWRANDOM_H_ +#define LINUX_HWRANDOM_H_ +#ifdef __KERNEL__ + +#include <linux/types.h> +#include <linux/list.h> + +/** + * struct hwrng - Hardware Random Number Generator driver + * @name: Unique RNG name. + * @init: Initialization callback (can be NULL). + * @cleanup: Cleanup callback (can be NULL). + * @data_present: Callback to determine if data is available + * on the RNG. If NULL, it is assumed that + * there is always data available. + * @data_read: Read data from the RNG device. + * Returns the number of lower random bytes in "data". + * Must not be NULL. + * @priv: Private data, for use by the RNG driver. + */ +struct hwrng { + const char *name; + int (*init)(struct hwrng *rng); + void (*cleanup)(struct hwrng *rng); + int (*data_present)(struct hwrng *rng); + int (*data_read)(struct hwrng *rng, u32 *data); + unsigned long priv; + + /* internal. */ + struct list_head list; +}; + +/** Register a new Hardware Random Number Generator driver. */ +extern int hwrng_register(struct hwrng *rng); +/** Unregister a Hardware Random Number Generator driver. */ +extern void hwrng_unregister(struct hwrng *rng); + +#endif /* __KERNEL__ */ +#endif /* LINUX_HWRANDOM_H_ */ |