/*
 *  include/asm-s390/zcrypt.h
 *
 *  zcrypt 2.0.0 (user-visible header)
 *
 *  Copyright (C)  2001, 2006 IBM Corporation
 *  Author(s): Robert Burroughs
 *	       Eric Rossman (edrossma@us.ibm.com)
 *
 *  Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifndef __ASM_S390_ZCRYPT_H
#define __ASM_S390_ZCRYPT_H

#define ZCRYPT_VERSION 2
#define ZCRYPT_RELEASE 1
#define ZCRYPT_VARIANT 0

#include <linux/ioctl.h>
#include <linux/compiler.h>

/**
 * struct ica_rsa_modexpo
 *
 * Requirements:
 * - outputdatalength is at least as large as inputdatalength.
 * - All key parts are right justified in their fields, padded on
 *   the left with zeroes.
 * - length(b_key) = inputdatalength
 * - length(n_modulus) = inputdatalength
 */
struct ica_rsa_modexpo {
	char __user *	inputdata;
	unsigned int	inputdatalength;
	char __user *	outputdata;
	unsigned int	outputdatalength;
	char __user *	b_key;
	char __user *	n_modulus;
};

/**
 * struct ica_rsa_modexpo_crt
 *
 * Requirements:
 * - inputdatalength is even.
 * - outputdatalength is at least as large as inputdatalength.
 * - All key parts are right justified in their fields, padded on
 *   the left with zeroes.
 * - length(bp_key)	= inputdatalength/2 + 8
 * - length(bq_key)	= inputdatalength/2
 * - length(np_key)	= inputdatalength/2 + 8
 * - length(nq_key)	= inputdatalength/2
 * - length(u_mult_inv) = inputdatalength/2 + 8
 */
struct ica_rsa_modexpo_crt {
	char __user *	inputdata;
	unsigned int	inputdatalength;
	char __user *	outputdata;
	unsigned int	outputdatalength;
	char __user *	bp_key;
	char __user *	bq_key;
	char __user *	np_prime;
	char __user *	nq_prime;
	char __user *	u_mult_inv;
};

#define ZCRYPT_IOCTL_MAGIC 'z'

/**
 * Interface notes:
 *
 * The ioctl()s which are implemented (along with relevant details)
 * are:
 *
 *   ICARSAMODEXPO
 *     Perform an RSA operation using a Modulus-Exponent pair
 *     This takes an ica_rsa_modexpo struct as its arg.
 *
 *     NOTE: please refer to the comments preceding this structure
 *	     for the implementation details for the contents of the
 *	     block
 *
 *   ICARSACRT
 *     Perform an RSA operation using a Chinese-Remainder Theorem key
 *     This takes an ica_rsa_modexpo_crt struct as its arg.
 *
 *     NOTE: please refer to the comments preceding this structure
 *	     for the implementation details for the contents of the
 *	     block
 *
 *   Z90STAT_TOTALCOUNT
 *     Return an integer count of all device types together.
 *
 *   Z90STAT_PCICACOUNT
 *     Return an integer count of all PCICAs.
 *
 *   Z90STAT_PCICCCOUNT
 *     Return an integer count of all PCICCs.
 *
 *   Z90STAT_PCIXCCMCL2COUNT
 *     Return an integer count of all MCL2 PCIXCCs.
 *
 *   Z90STAT_PCIXCCMCL3COUNT
 *     Return an integer count of all MCL3 PCIXCCs.
 *
 *   Z90STAT_CEX2CCOUNT
 *     Return an integer count of all CEX2Cs.
 *
 *   Z90STAT_CEX2ACOUNT
 *     Return an integer count of all CEX2As.
 *
 *   Z90STAT_REQUESTQ_COUNT
 *     Return an integer count of the number of entries waiting to be
 *     sent to a device.
 *
 *   Z90STAT_PENDINGQ_COUNT
 *     Return an integer count of the number of entries sent to a
 *     device awaiting the reply.
 *
 *   Z90STAT_TOTALOPEN_COUNT
 *     Return an integer count of the number of open file handles.
 *
 *   Z90STAT_DOMAIN_INDEX
 *     Return the integer value of the Cryptographic Domain.
 *
 *   Z90STAT_STATUS_MASK
 *     Return an 64 element array of unsigned chars for the status of
 *     all devices.
 *	 0x01: PCICA
 *	 0x02: PCICC
 *	 0x03: PCIXCC_MCL2
 *	 0x04: PCIXCC_MCL3
 *	 0x05: CEX2C
 *	 0x06: CEX2A
 *	 0x0d: device is disabled via the proc filesystem
 *
 *   Z90STAT_QDEPTH_MASK
 *     Return an 64 element array of unsigned chars for the queue
 *     depth of all devices.
 *
 *   Z90STAT_PERDEV_REQCNT
 *     Return an 64 element array of unsigned integers for the number
 *     of successfully completed requests per device since the device
 *     was detected and made available.
 *
 *   ICAZ90STATUS (deprecated)
 *     Return some device driver status in a ica_z90_status struct
 *     This takes an ica_z90_status struct as its arg.
 *
 *     NOTE: this ioctl() is deprecated, and has been replaced with
 *	     single ioctl()s for each type of status being requested
 *
 *   Z90STAT_PCIXCCCOUNT (deprecated)
 *     Return an integer count of all PCIXCCs (MCL2 + MCL3).
 *     This is DEPRECATED now that MCL3 PCIXCCs are treated differently from
 *     MCL2 PCIXCCs.
 *
 *   Z90QUIESCE (not recommended)
 *     Quiesce the driver.  This is intended to stop all new
 *     requests from being processed.  Its use is NOT recommended,
 *     except in circumstances where there is no other way to stop
 *     callers from accessing the driver.  Its original use was to
 *     allow the driver to be "drained" of work in preparation for
 *     a system shutdown.
 *
 *     NOTE: once issued, this ban on new work cannot be undone
 *	     except by unloading and reloading the driver.
 */

/**
 * Supported ioctl calls
 */
#define ICARSAMODEXPO	_IOC(_IOC_READ|_IOC_WRITE, ZCRYPT_IOCTL_MAGIC, 0x05, 0)
#define ICARSACRT	_IOC(_IOC_READ|_IOC_WRITE, ZCRYPT_IOCTL_MAGIC, 0x06, 0)

/* New status calls */
#define Z90STAT_TOTALCOUNT	_IOR(ZCRYPT_IOCTL_MAGIC, 0x40, int)
#define Z90STAT_PCICACOUNT	_IOR(ZCRYPT_IOCTL_MAGIC, 0x41, int)
#define Z90STAT_PCICCCOUNT	_IOR(ZCRYPT_IOCTL_MAGIC, 0x42, int)
#define Z90STAT_PCIXCCMCL2COUNT	_IOR(ZCRYPT_IOCTL_MAGIC, 0x4b, int)
#define Z90STAT_PCIXCCMCL3COUNT	_IOR(ZCRYPT_IOCTL_MAGIC, 0x4c, int)
#define Z90STAT_CEX2CCOUNT	_IOR(ZCRYPT_IOCTL_MAGIC, 0x4d, int)
#define Z90STAT_CEX2ACOUNT	_IOR(ZCRYPT_IOCTL_MAGIC, 0x4e, int)
#define Z90STAT_REQUESTQ_COUNT	_IOR(ZCRYPT_IOCTL_MAGIC, 0x44, int)
#define Z90STAT_PENDINGQ_COUNT	_IOR(ZCRYPT_IOCTL_MAGIC, 0x45, int)
#define Z90STAT_TOTALOPEN_COUNT _IOR(ZCRYPT_IOCTL_MAGIC, 0x46, int)
#define Z90STAT_DOMAIN_INDEX	_IOR(ZCRYPT_IOCTL_MAGIC, 0x47, int)
#define Z90STAT_STATUS_MASK	_IOR(ZCRYPT_IOCTL_MAGIC, 0x48, char[64])
#define Z90STAT_QDEPTH_MASK	_IOR(ZCRYPT_IOCTL_MAGIC, 0x49, char[64])
#define Z90STAT_PERDEV_REQCNT	_IOR(ZCRYPT_IOCTL_MAGIC, 0x4a, int[64])

#endif /* __ASM_S390_ZCRYPT_H */