hw_random.h

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/*
    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_

#include <linux/types.h>
#include <linux/list.h>

struct hwrng {
    const char *name;
    int (*init)(struct hwrng *rng);
    void (*cleanup)(struct hwrng *rng);
    int (*data_present)(struct hwrng *rng, int wait);
    int (*data_read)(struct hwrng *rng, u32 *data);
    int (*read)(struct hwrng *rng, void *data, size_t max, bool wait);
    unsigned long priv;

    /* internal. */
    struct list_head list;
};

extern int hwrng_register(struct hwrng *rng);
extern void hwrng_unregister(struct hwrng *rng);

#endif /* LINUX_HWRANDOM_H_ */