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+/*
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+ * include/asm-s390/z90crypt.h
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+ *
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+ * z90crypt 1.3.3 (user-visible header)
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+ *
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+ * Copyright (C) 2001, 2005 IBM Corporation
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+ * Author(s): Robert Burroughs
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+ * Eric Rossman (edrossma@us.ibm.com)
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+ *
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+ * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2, or (at your option)
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+ * any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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+ */
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+
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+#ifndef __ASM_S390_Z90CRYPT_H
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+#define __ASM_S390_Z90CRYPT_H
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+#include <linux/ioctl.h>
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+
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+#define z90crypt_VERSION 1
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+#define z90crypt_RELEASE 3 // 2 = PCIXCC, 3 = rewrite for coding standards
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+#define z90crypt_VARIANT 3 // 3 = CEX2A support
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+
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+/**
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+ * struct ica_rsa_modexpo
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+ *
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+ * Requirements:
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+ * - outputdatalength is at least as large as inputdatalength.
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+ * - All key parts are right justified in their fields, padded on
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+ * the left with zeroes.
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+ * - length(b_key) = inputdatalength
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+ * - length(n_modulus) = inputdatalength
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+ */
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+struct ica_rsa_modexpo {
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+ char __user * inputdata;
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+ unsigned int inputdatalength;
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+ char __user * outputdata;
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+ unsigned int outputdatalength;
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+ char __user * b_key;
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+ char __user * n_modulus;
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+};
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+
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+/**
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+ * struct ica_rsa_modexpo_crt
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+ *
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+ * Requirements:
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+ * - inputdatalength is even.
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+ * - outputdatalength is at least as large as inputdatalength.
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+ * - All key parts are right justified in their fields, padded on
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+ * the left with zeroes.
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+ * - length(bp_key) = inputdatalength/2 + 8
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+ * - length(bq_key) = inputdatalength/2
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+ * - length(np_key) = inputdatalength/2 + 8
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+ * - length(nq_key) = inputdatalength/2
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+ * - length(u_mult_inv) = inputdatalength/2 + 8
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+ */
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+struct ica_rsa_modexpo_crt {
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+ char __user * inputdata;
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+ unsigned int inputdatalength;
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+ char __user * outputdata;
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+ unsigned int outputdatalength;
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+ char __user * bp_key;
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+ char __user * bq_key;
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+ char __user * np_prime;
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+ char __user * nq_prime;
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+ char __user * u_mult_inv;
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+};
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+
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+#define Z90_IOCTL_MAGIC 'z' // NOTE: Need to allocate from linux folks
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+
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+/**
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+ * Interface notes:
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+ *
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+ * The ioctl()s which are implemented (along with relevant details)
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+ * are:
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+ *
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+ * ICARSAMODEXPO
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+ * Perform an RSA operation using a Modulus-Exponent pair
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+ * This takes an ica_rsa_modexpo struct as its arg.
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+ *
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+ * NOTE: please refer to the comments preceding this structure
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+ * for the implementation details for the contents of the
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+ * block
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+ *
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+ * ICARSACRT
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+ * Perform an RSA operation using a Chinese-Remainder Theorem key
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+ * This takes an ica_rsa_modexpo_crt struct as its arg.
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+ *
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+ * NOTE: please refer to the comments preceding this structure
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+ * for the implementation details for the contents of the
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+ * block
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+ *
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+ * Z90STAT_TOTALCOUNT
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+ * Return an integer count of all device types together.
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+ *
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+ * Z90STAT_PCICACOUNT
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+ * Return an integer count of all PCICAs.
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+ *
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+ * Z90STAT_PCICCCOUNT
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+ * Return an integer count of all PCICCs.
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+ *
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+ * Z90STAT_PCIXCCMCL2COUNT
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+ * Return an integer count of all MCL2 PCIXCCs.
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+ *
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+ * Z90STAT_PCIXCCMCL3COUNT
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+ * Return an integer count of all MCL3 PCIXCCs.
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+ *
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+ * Z90STAT_CEX2CCOUNT
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+ * Return an integer count of all CEX2Cs.
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+ *
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+ * Z90STAT_CEX2ACOUNT
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+ * Return an integer count of all CEX2As.
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+ *
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+ * Z90STAT_REQUESTQ_COUNT
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+ * Return an integer count of the number of entries waiting to be
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+ * sent to a device.
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+ *
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+ * Z90STAT_PENDINGQ_COUNT
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+ * Return an integer count of the number of entries sent to a
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+ * device awaiting the reply.
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+ *
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+ * Z90STAT_TOTALOPEN_COUNT
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+ * Return an integer count of the number of open file handles.
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+ *
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+ * Z90STAT_DOMAIN_INDEX
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+ * Return the integer value of the Cryptographic Domain.
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+ *
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+ * Z90STAT_STATUS_MASK
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+ * Return an 64 element array of unsigned chars for the status of
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+ * all devices.
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+ * 0x01: PCICA
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+ * 0x02: PCICC
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+ * 0x03: PCIXCC_MCL2
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+ * 0x04: PCIXCC_MCL3
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+ * 0x05: CEX2C
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+ * 0x06: CEX2A
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+ * 0x0d: device is disabled via the proc filesystem
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+ *
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+ * Z90STAT_QDEPTH_MASK
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+ * Return an 64 element array of unsigned chars for the queue
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+ * depth of all devices.
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+ *
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+ * Z90STAT_PERDEV_REQCNT
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+ * Return an 64 element array of unsigned integers for the number
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+ * of successfully completed requests per device since the device
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+ * was detected and made available.
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+ *
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+ * ICAZ90STATUS (deprecated)
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+ * Return some device driver status in a ica_z90_status struct
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+ * This takes an ica_z90_status struct as its arg.
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+ *
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+ * NOTE: this ioctl() is deprecated, and has been replaced with
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+ * single ioctl()s for each type of status being requested
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+ *
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+ * Z90STAT_PCIXCCCOUNT (deprecated)
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+ * Return an integer count of all PCIXCCs (MCL2 + MCL3).
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+ * This is DEPRECATED now that MCL3 PCIXCCs are treated differently from
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+ * MCL2 PCIXCCs.
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+ *
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+ * Z90QUIESCE (not recommended)
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+ * Quiesce the driver. This is intended to stop all new
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+ * requests from being processed. Its use is NOT recommended,
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+ * except in circumstances where there is no other way to stop
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+ * callers from accessing the driver. Its original use was to
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+ * allow the driver to be "drained" of work in preparation for
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+ * a system shutdown.
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+ *
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+ * NOTE: once issued, this ban on new work cannot be undone
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+ * except by unloading and reloading the driver.
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+ */
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+
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+/**
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+ * Supported ioctl calls
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+ */
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+#define ICARSAMODEXPO _IOC(_IOC_READ|_IOC_WRITE, Z90_IOCTL_MAGIC, 0x05, 0)
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+#define ICARSACRT _IOC(_IOC_READ|_IOC_WRITE, Z90_IOCTL_MAGIC, 0x06, 0)
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+
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+/* DEPRECATED status calls (bound for removal at some point) */
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+#define ICAZ90STATUS _IOR(Z90_IOCTL_MAGIC, 0x10, struct ica_z90_status)
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+#define Z90STAT_PCIXCCCOUNT _IOR(Z90_IOCTL_MAGIC, 0x43, int)
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+
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+/* unrelated to ICA callers */
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+#define Z90QUIESCE _IO(Z90_IOCTL_MAGIC, 0x11)
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+
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+/* New status calls */
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+#define Z90STAT_TOTALCOUNT _IOR(Z90_IOCTL_MAGIC, 0x40, int)
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+#define Z90STAT_PCICACOUNT _IOR(Z90_IOCTL_MAGIC, 0x41, int)
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+#define Z90STAT_PCICCCOUNT _IOR(Z90_IOCTL_MAGIC, 0x42, int)
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+#define Z90STAT_PCIXCCMCL2COUNT _IOR(Z90_IOCTL_MAGIC, 0x4b, int)
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+#define Z90STAT_PCIXCCMCL3COUNT _IOR(Z90_IOCTL_MAGIC, 0x4c, int)
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+#define Z90STAT_CEX2CCOUNT _IOR(Z90_IOCTL_MAGIC, 0x4d, int)
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+#define Z90STAT_CEX2ACOUNT _IOR(Z90_IOCTL_MAGIC, 0x4e, int)
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+#define Z90STAT_REQUESTQ_COUNT _IOR(Z90_IOCTL_MAGIC, 0x44, int)
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+#define Z90STAT_PENDINGQ_COUNT _IOR(Z90_IOCTL_MAGIC, 0x45, int)
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+#define Z90STAT_TOTALOPEN_COUNT _IOR(Z90_IOCTL_MAGIC, 0x46, int)
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+#define Z90STAT_DOMAIN_INDEX _IOR(Z90_IOCTL_MAGIC, 0x47, int)
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+#define Z90STAT_STATUS_MASK _IOR(Z90_IOCTL_MAGIC, 0x48, char[64])
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+#define Z90STAT_QDEPTH_MASK _IOR(Z90_IOCTL_MAGIC, 0x49, char[64])
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+#define Z90STAT_PERDEV_REQCNT _IOR(Z90_IOCTL_MAGIC, 0x4a, int[64])
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+
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+#endif /* __ASM_S390_Z90CRYPT_H */
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David Woodhouse