Eric Lee / smarc-fsl-linux-kernel

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include/crypto/mcryptd.h 2.37 KB
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81f7e3824   Eric Lee   Initial Release, ... 
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  /* SPDX-License-Identifier: GPL-2.0 */
  /*
   * 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_ahash *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 ahash_request areq;
  };
  
  struct mcryptd_ahash *mcryptd_alloc_ahash(const char *alg_name,
  					u32 type, u32 mask);
  struct crypto_ahash *mcryptd_ahash_child(struct mcryptd_ahash *tfm);
  struct ahash_request *mcryptd_ahash_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