v4.19.13 snapshot.
diff --git a/include/crypto/mcryptd.h b/include/crypto/mcryptd.h
new file mode 100644
index 0000000..b67404f
--- /dev/null
+++ b/include/crypto/mcryptd.h
@@ -0,0 +1,114 @@
+/* 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