mirror of
https://github.com/torvalds/linux
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1e65b81a90
This patch introduces the multi-buffer crypto daemon which is responsible for submitting crypto jobs in a work queue to the responsible multi-buffer crypto algorithm. The idea of the multi-buffer algorihtm is to put data streams from multiple jobs in a wide (AVX2) register and then take advantage of SIMD instructions to do crypto computation on several buffers simultaneously. The multi-buffer crypto daemon is also responsbile for flushing the remaining buffers to complete the computation if no new buffers arrive for a while. Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
112 lines
2.3 KiB
C
112 lines
2.3 KiB
C
/*
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* Software async multibuffer crypto daemon headers
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*
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* Author:
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* Tim Chen <tim.c.chen@linux.intel.com>
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*
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* Copyright (c) 2014, Intel Corporation.
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*/
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#ifndef _CRYPTO_MCRYPT_H
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#define _CRYPTO_MCRYPT_H
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#include <linux/crypto.h>
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#include <linux/kernel.h>
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#include <crypto/hash.h>
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struct mcryptd_ahash {
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struct crypto_ahash base;
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};
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static inline struct mcryptd_ahash *__mcryptd_ahash_cast(
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struct crypto_ahash *tfm)
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{
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return (struct mcryptd_ahash *)tfm;
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}
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struct mcryptd_cpu_queue {
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struct crypto_queue queue;
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struct work_struct work;
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};
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struct mcryptd_queue {
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struct mcryptd_cpu_queue __percpu *cpu_queue;
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};
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struct mcryptd_instance_ctx {
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struct crypto_spawn spawn;
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struct mcryptd_queue *queue;
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};
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struct mcryptd_hash_ctx {
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struct crypto_shash *child;
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struct mcryptd_alg_state *alg_state;
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};
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struct mcryptd_tag {
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/* seq number of request */
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unsigned seq_num;
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/* arrival time of request */
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unsigned long arrival;
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unsigned long expire;
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int cpu;
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};
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struct mcryptd_hash_request_ctx {
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struct list_head waiter;
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crypto_completion_t complete;
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struct mcryptd_tag tag;
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struct crypto_hash_walk walk;
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u8 *out;
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int flag;
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struct shash_desc desc;
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};
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struct mcryptd_ahash *mcryptd_alloc_ahash(const char *alg_name,
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u32 type, u32 mask);
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struct crypto_shash *mcryptd_ahash_child(struct mcryptd_ahash *tfm);
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struct shash_desc *mcryptd_shash_desc(struct ahash_request *req);
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void mcryptd_free_ahash(struct mcryptd_ahash *tfm);
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void mcryptd_flusher(struct work_struct *work);
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enum mcryptd_req_type {
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MCRYPTD_NONE,
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MCRYPTD_UPDATE,
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MCRYPTD_FINUP,
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MCRYPTD_DIGEST,
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MCRYPTD_FINAL
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};
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struct mcryptd_alg_cstate {
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unsigned long next_flush;
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unsigned next_seq_num;
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bool flusher_engaged;
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struct delayed_work flush;
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int cpu;
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struct mcryptd_alg_state *alg_state;
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void *mgr;
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spinlock_t work_lock;
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struct list_head work_list;
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struct list_head flush_list;
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};
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struct mcryptd_alg_state {
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struct mcryptd_alg_cstate __percpu *alg_cstate;
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unsigned long (*flusher)(struct mcryptd_alg_cstate *cstate);
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};
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/* return delay in jiffies from current time */
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static inline unsigned long get_delay(unsigned long t)
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{
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long delay;
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delay = (long) t - (long) jiffies;
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if (delay <= 0)
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return 0;
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else
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return (unsigned long) delay;
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}
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void mcryptd_arm_flusher(struct mcryptd_alg_cstate *cstate, unsigned long delay);
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#endif
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