From 1e65b81a90df50bf450193065cc9073b706b8dda Mon Sep 17 00:00:00 2001 From: Tim Chen Date: Thu, 31 Jul 2014 10:29:51 -0700 Subject: crypto: sha-mb - multibuffer crypto infrastructure 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 Signed-off-by: Herbert Xu --- include/crypto/mcryptd.h | 112 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 112 insertions(+) create mode 100644 include/crypto/mcryptd.h (limited to 'include/crypto/mcryptd.h') diff --git a/include/crypto/mcryptd.h b/include/crypto/mcryptd.h new file mode 100644 index 0000000..c23ee1f --- /dev/null +++ b/include/crypto/mcryptd.h @@ -0,0 +1,112 @@ +/* + * Software async multibuffer crypto daemon headers + * + * Author: + * Tim Chen + * + * Copyright (c) 2014, Intel Corporation. + */ + +#ifndef _CRYPTO_MCRYPT_H +#define _CRYPTO_MCRYPT_H + +#include +#include +#include + +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; + 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 -- cgit v1.1