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/*
* Software async multibuffer crypto daemon headers
*
* Author:
* Tim Chen <tim.c.chen@linux.intel.com>
*
* Copyright (c) 2014, Intel Corporation.
*/
#ifndef _CRYPTO_MCRYPT_H
#define _CRYPTO_MCRYPT_H
#include <linux/crypto.h>
#include <linux/kernel.h>
#include <crypto/hash.h>
struct mcryptd_ahash {
struct crypto_ahash base;
};
static inline struct mcryptd_ahash *__mcryptd_ahash_cast(
struct crypto_ahash *tfm)
{
return (struct mcryptd_ahash *)tfm;
}
struct mcryptd_cpu_queue {
struct crypto_queue queue;
spinlock_t q_lock;
struct work_struct work;
};
struct mcryptd_queue {
struct mcryptd_cpu_queue __percpu *cpu_queue;
};
struct mcryptd_instance_ctx {
struct crypto_spawn spawn;
struct mcryptd_queue *queue;
};
struct mcryptd_hash_ctx {
struct crypto_shash *child;
struct mcryptd_alg_state *alg_state;
};
struct mcryptd_tag {
/* seq number of request */
unsigned seq_num;
/* arrival time of request */
unsigned long arrival;
unsigned long expire;
int cpu;
};
struct mcryptd_hash_request_ctx {
struct list_head waiter;
crypto_completion_t complete;
struct mcryptd_tag tag;
struct crypto_hash_walk walk;
u8 *out;
int flag;
struct shash_desc desc;
};
struct mcryptd_ahash *mcryptd_alloc_ahash(const char *alg_name,
u32 type, u32 mask);
struct crypto_shash *mcryptd_ahash_child(struct mcryptd_ahash *tfm);
struct shash_desc *mcryptd_shash_desc(struct ahash_request *req);
void mcryptd_free_ahash(struct mcryptd_ahash *tfm);
void mcryptd_flusher(struct work_struct *work);
enum mcryptd_req_type {
MCRYPTD_NONE,
MCRYPTD_UPDATE,
MCRYPTD_FINUP,
MCRYPTD_DIGEST,
MCRYPTD_FINAL
};
struct mcryptd_alg_cstate {
unsigned long next_flush;
unsigned next_seq_num;
bool flusher_engaged;
struct delayed_work flush;
int cpu;
struct mcryptd_alg_state *alg_state;
void *mgr;
spinlock_t work_lock;
struct list_head work_list;
struct list_head flush_list;
};
struct mcryptd_alg_state {
struct mcryptd_alg_cstate __percpu *alg_cstate;
unsigned long (*flusher)(struct mcryptd_alg_cstate *cstate);
};
/* return delay in jiffies from current time */
static inline unsigned long get_delay(unsigned long t)
{
long delay;
delay = (long) t - (long) jiffies;
if (delay <= 0)
return 0;
else
return (unsigned long) delay;
}
void mcryptd_arm_flusher(struct mcryptd_alg_cstate *cstate, unsigned long delay);
#endif