v4.19.13 snapshot.
diff --git a/drivers/s390/crypto/zcrypt_api.h b/drivers/s390/crypto/zcrypt_api.h
new file mode 100644
index 0000000..a848625
--- /dev/null
+++ b/drivers/s390/crypto/zcrypt_api.h
@@ -0,0 +1,160 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * zcrypt 2.1.0
+ *
+ * Copyright IBM Corp. 2001, 2012
+ * Author(s): Robert Burroughs
+ * Eric Rossman (edrossma@us.ibm.com)
+ * Cornelia Huck <cornelia.huck@de.ibm.com>
+ *
+ * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
+ * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
+ * Ralph Wuerthner <rwuerthn@de.ibm.com>
+ * MSGTYPE restruct: Holger Dengler <hd@linux.vnet.ibm.com>
+ */
+
+#ifndef _ZCRYPT_API_H_
+#define _ZCRYPT_API_H_
+
+#include <linux/atomic.h>
+#include <asm/debug.h>
+#include <asm/zcrypt.h>
+#include "ap_bus.h"
+
+/**
+ * device type for an actual device is either PCICA, PCICC, PCIXCC_MCL2,
+ * PCIXCC_MCL3, CEX2C, or CEX2A
+ *
+ * NOTE: PCIXCC_MCL3 refers to a PCIXCC with May 2004 version of Licensed
+ * Internal Code (LIC) (EC J12220 level 29).
+ * PCIXCC_MCL2 refers to any LIC before this level.
+ */
+#define ZCRYPT_PCICA 1
+#define ZCRYPT_PCICC 2
+#define ZCRYPT_PCIXCC_MCL2 3
+#define ZCRYPT_PCIXCC_MCL3 4
+#define ZCRYPT_CEX2C 5
+#define ZCRYPT_CEX2A 6
+#define ZCRYPT_CEX3C 7
+#define ZCRYPT_CEX3A 8
+#define ZCRYPT_CEX4 10
+#define ZCRYPT_CEX5 11
+#define ZCRYPT_CEX6 12
+
+/**
+ * Large random numbers are pulled in 4096 byte chunks from the crypto cards
+ * and stored in a page. Be careful when increasing this buffer due to size
+ * limitations for AP requests.
+ */
+#define ZCRYPT_RNG_BUFFER_SIZE 4096
+
+/*
+ * Identifier for Crypto Request Performance Index
+ */
+enum crypto_ops {
+ MEX_1K,
+ MEX_2K,
+ MEX_4K,
+ CRT_1K,
+ CRT_2K,
+ CRT_4K,
+ HWRNG,
+ SECKEY,
+ NUM_OPS
+};
+
+struct zcrypt_queue;
+
+struct zcrypt_ops {
+ long (*rsa_modexpo)(struct zcrypt_queue *, struct ica_rsa_modexpo *);
+ long (*rsa_modexpo_crt)(struct zcrypt_queue *,
+ struct ica_rsa_modexpo_crt *);
+ long (*send_cprb)(struct zcrypt_queue *, struct ica_xcRB *,
+ struct ap_message *);
+ long (*send_ep11_cprb)(struct zcrypt_queue *, struct ep11_urb *,
+ struct ap_message *);
+ long (*rng)(struct zcrypt_queue *, char *, struct ap_message *);
+ struct list_head list; /* zcrypt ops list. */
+ struct module *owner;
+ int variant;
+ char name[128];
+};
+
+struct zcrypt_card {
+ struct list_head list; /* Device list. */
+ struct list_head zqueues; /* List of zcrypt queues */
+ struct kref refcount; /* device refcounting */
+ struct ap_card *card; /* The "real" ap card device. */
+ int online; /* User online/offline */
+
+ int user_space_type; /* User space device id. */
+ char *type_string; /* User space device name. */
+ int min_mod_size; /* Min number of bits. */
+ int max_mod_size; /* Max number of bits. */
+ int max_exp_bit_length;
+ int speed_rating[NUM_OPS]; /* Speed idx of crypto ops. */
+ atomic_t load; /* Utilization of the crypto device */
+
+ int request_count; /* # current requests. */
+};
+
+struct zcrypt_queue {
+ struct list_head list; /* Device list. */
+ struct kref refcount; /* device refcounting */
+ struct zcrypt_card *zcard;
+ struct zcrypt_ops *ops; /* Crypto operations. */
+ struct ap_queue *queue; /* The "real" ap queue device. */
+ int online; /* User online/offline */
+
+ atomic_t load; /* Utilization of the crypto device */
+
+ int request_count; /* # current requests. */
+
+ struct ap_message reply; /* Per-device reply structure. */
+};
+
+/* transport layer rescanning */
+extern atomic_t zcrypt_rescan_req;
+
+extern spinlock_t zcrypt_list_lock;
+extern int zcrypt_device_count;
+extern struct list_head zcrypt_card_list;
+
+#define for_each_zcrypt_card(_zc) \
+ list_for_each_entry(_zc, &zcrypt_card_list, list)
+
+#define for_each_zcrypt_queue(_zq, _zc) \
+ list_for_each_entry(_zq, &(_zc)->zqueues, list)
+
+struct zcrypt_card *zcrypt_card_alloc(void);
+void zcrypt_card_free(struct zcrypt_card *);
+void zcrypt_card_get(struct zcrypt_card *);
+int zcrypt_card_put(struct zcrypt_card *);
+int zcrypt_card_register(struct zcrypt_card *);
+void zcrypt_card_unregister(struct zcrypt_card *);
+struct zcrypt_card *zcrypt_card_get_best(unsigned int *,
+ unsigned int, unsigned int);
+void zcrypt_card_put_best(struct zcrypt_card *, unsigned int);
+
+struct zcrypt_queue *zcrypt_queue_alloc(size_t);
+void zcrypt_queue_free(struct zcrypt_queue *);
+void zcrypt_queue_get(struct zcrypt_queue *);
+int zcrypt_queue_put(struct zcrypt_queue *);
+int zcrypt_queue_register(struct zcrypt_queue *);
+void zcrypt_queue_unregister(struct zcrypt_queue *);
+void zcrypt_queue_force_online(struct zcrypt_queue *, int);
+struct zcrypt_queue *zcrypt_queue_get_best(unsigned int, unsigned int);
+void zcrypt_queue_put_best(struct zcrypt_queue *, unsigned int);
+
+int zcrypt_rng_device_add(void);
+void zcrypt_rng_device_remove(void);
+
+void zcrypt_msgtype_register(struct zcrypt_ops *);
+void zcrypt_msgtype_unregister(struct zcrypt_ops *);
+struct zcrypt_ops *zcrypt_msgtype(unsigned char *, int);
+int zcrypt_api_init(void);
+void zcrypt_api_exit(void);
+long zcrypt_send_cprb(struct ica_xcRB *xcRB);
+void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus);
+
+#endif /* _ZCRYPT_API_H_ */