Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 185 insertions, 0 deletions

diff --git a/drivers/s390/crypto/zcrypt_api.h b/drivers/s390/crypto/zcrypt_api.h
new file mode 100644
index 0000000000..de659954c8
--- /dev/null
+++ b/drivers/s390/crypto/zcrypt_api.h
@@ -0,0 +1,185 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ *  Copyright IBM Corp. 2001, 2019
+ *  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"
+
+/**
+ * Supported device types
+ */
+#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
+#define ZCRYPT_CEX7	       13
+
+/**
+ * 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 to hold tracking information for a userspace request/response */
+struct zcrypt_track {
+	int again_counter;		/* retry attempts counter */
+	int last_qid;			/* last qid used */
+	int last_rc;			/* last return code */
+};
+
+/* defines related to message tracking */
+#define TRACK_AGAIN_MAX 10
+#define TRACK_AGAIN_CARD_WEIGHT_PENALTY  1000
+#define TRACK_AGAIN_QUEUE_WEIGHT_PENALTY 10000
+
+struct zcrypt_ops {
+	long (*rsa_modexpo)(struct zcrypt_queue *, struct ica_rsa_modexpo *,
+			    struct ap_message *);
+	long (*rsa_modexpo_crt)(struct zcrypt_queue *,
+				struct ica_rsa_modexpo_crt *,
+				struct ap_message *);
+	long (*send_cprb)(bool userspace, struct zcrypt_queue *, struct ica_xcRB *,
+			  struct ap_message *);
+	long (*send_ep11_cprb)(bool userspace, 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;
+	const int *speed_rating;	/* 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 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_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 *);
+bool zcrypt_queue_force_online(struct zcrypt_queue *zq, int online);
+
+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);
+long zcrypt_send_ep11_cprb(struct ep11_urb *urb);
+void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus);
+int zcrypt_device_status_ext(int card, int queue,
+			     struct zcrypt_device_status_ext *devstatus);
+
+int zcrypt_wait_api_operational(void);
+
+static inline unsigned long z_copy_from_user(bool userspace,
+					     void *to,
+					     const void __user *from,
+					     unsigned long n)
+{
+	if (likely(userspace))
+		return copy_from_user(to, from, n);
+	memcpy(to, (void __force *)from, n);
+	return 0;
+}
+
+static inline unsigned long z_copy_to_user(bool userspace,
+					   void __user *to,
+					   const void *from,
+					   unsigned long n)
+{
+	if (likely(userspace))
+		return copy_to_user(to, from, n);
+	memcpy((void __force *)to, from, n);
+	return 0;
+}
+
+#endif /* _ZCRYPT_API_H_ */