--- /dev/null
+/*
+ * zcrypt 2.1.0
+ *
+ * Copyright IBM Corp. 2001, 2012
+ * Author(s): Robert Burroughs
+ * Eric Rossman (edrossma@us.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>
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/atomic.h>
+#include <asm/uaccess.h>
+
+#include "ap_bus.h"
+#include "zcrypt_api.h"
+#include "zcrypt_error.h"
+#include "zcrypt_cex2a.h"
+#include "zcrypt_msgtype50.h"
+
+#define CEX2A_MIN_MOD_SIZE 1 /* 8 bits */
+#define CEX2A_MAX_MOD_SIZE 256 /* 2048 bits */
+#define CEX3A_MIN_MOD_SIZE CEX2A_MIN_MOD_SIZE
+#define CEX3A_MAX_MOD_SIZE 512 /* 4096 bits */
+
+#define CEX2A_SPEED_RATING 970
+#define CEX3A_SPEED_RATING 900 /* Fixme: Needs finetuning */
+
+#define CEX2A_MAX_MESSAGE_SIZE 0x390 /* sizeof(struct type50_crb2_msg) */
+#define CEX2A_MAX_RESPONSE_SIZE 0x110 /* max outputdatalength + type80_hdr */
+
+#define CEX3A_MAX_RESPONSE_SIZE 0x210 /* 512 bit modulus
+ * (max outputdatalength) +
+ * type80_hdr*/
+#define CEX3A_MAX_MESSAGE_SIZE sizeof(struct type50_crb3_msg)
+
+#define CEX2A_CLEANUP_TIME (15*HZ)
+#define CEX3A_CLEANUP_TIME CEX2A_CLEANUP_TIME
+
+static struct ap_device_id zcrypt_cex2a_ids[] = {
+ { AP_DEVICE(AP_DEVICE_TYPE_CEX2A) },
+ { AP_DEVICE(AP_DEVICE_TYPE_CEX3A) },
+ { /* end of list */ },
+};
+
+MODULE_DEVICE_TABLE(ap, zcrypt_cex2a_ids);
+MODULE_AUTHOR("IBM Corporation");
+MODULE_DESCRIPTION("CEX2A Cryptographic Coprocessor device driver, " \
+ "Copyright IBM Corp. 2001, 2012");
+MODULE_LICENSE("GPL");
+
+static int zcrypt_cex2a_probe(struct ap_device *ap_dev);
+static void zcrypt_cex2a_remove(struct ap_device *ap_dev);
+
+static struct ap_driver zcrypt_cex2a_driver = {
+ .probe = zcrypt_cex2a_probe,
+ .remove = zcrypt_cex2a_remove,
+ .ids = zcrypt_cex2a_ids,
+ .request_timeout = CEX2A_CLEANUP_TIME,
+};
+
+/**
+ * Probe function for CEX2A cards. It always accepts the AP device
+ * since the bus_match already checked the hardware type.
+ * @ap_dev: pointer to the AP device.
+ */
+static int zcrypt_cex2a_probe(struct ap_device *ap_dev)
+{
+ struct zcrypt_device *zdev = NULL;
+ int rc = 0;
+
+ switch (ap_dev->device_type) {
+ case AP_DEVICE_TYPE_CEX2A:
+ zdev = zcrypt_device_alloc(CEX2A_MAX_RESPONSE_SIZE);
+ if (!zdev)
+ return -ENOMEM;
+ zdev->user_space_type = ZCRYPT_CEX2A;
+ zdev->type_string = "CEX2A";
+ zdev->min_mod_size = CEX2A_MIN_MOD_SIZE;
+ zdev->max_mod_size = CEX2A_MAX_MOD_SIZE;
+ zdev->short_crt = 1;
+ zdev->speed_rating = CEX2A_SPEED_RATING;
+ zdev->max_exp_bit_length = CEX2A_MAX_MOD_SIZE;
+ break;
+ case AP_DEVICE_TYPE_CEX3A:
+ zdev = zcrypt_device_alloc(CEX3A_MAX_RESPONSE_SIZE);
+ if (!zdev)
+ return -ENOMEM;
+ zdev->user_space_type = ZCRYPT_CEX3A;
+ zdev->type_string = "CEX3A";
+ zdev->min_mod_size = CEX2A_MIN_MOD_SIZE;
+ zdev->max_mod_size = CEX2A_MAX_MOD_SIZE;
+ zdev->max_exp_bit_length = CEX2A_MAX_MOD_SIZE;
+ if (ap_test_bit(&ap_dev->functions, AP_FUNC_MEX4K) &&
+ ap_test_bit(&ap_dev->functions, AP_FUNC_CRT4K)) {
+ zdev->max_mod_size = CEX3A_MAX_MOD_SIZE;
+ zdev->max_exp_bit_length = CEX3A_MAX_MOD_SIZE;
+ }
+ zdev->short_crt = 1;
+ zdev->speed_rating = CEX3A_SPEED_RATING;
+ break;
+ }
+ if (!zdev)
+ return -ENODEV;
+ zdev->ops = zcrypt_msgtype_request(MSGTYPE50_NAME,
+ MSGTYPE50_VARIANT_DEFAULT);
+ zdev->ap_dev = ap_dev;
+ zdev->online = 1;
+ ap_dev->reply = &zdev->reply;
+ ap_dev->private = zdev;
+ rc = zcrypt_device_register(zdev);
+ if (rc) {
+ ap_dev->private = NULL;
+ zcrypt_msgtype_release(zdev->ops);
+ zcrypt_device_free(zdev);
+ }
+ return rc;
+}
+
+/**
+ * This is called to remove the extended CEX2A driver information
+ * if an AP device is removed.
+ */
+static void zcrypt_cex2a_remove(struct ap_device *ap_dev)
+{
+ struct zcrypt_device *zdev = ap_dev->private;
+ struct zcrypt_ops *zops = zdev->ops;
+
+ zcrypt_device_unregister(zdev);
+ zcrypt_msgtype_release(zops);
+}
+
+int __init zcrypt_cex2a_init(void)
+{
+ return ap_driver_register(&zcrypt_cex2a_driver, THIS_MODULE, "cex2a");
+}
+
+void __exit zcrypt_cex2a_exit(void)
+{
+ ap_driver_unregister(&zcrypt_cex2a_driver);
+}
+
+module_init(zcrypt_cex2a_init);
+module_exit(zcrypt_cex2a_exit);
Code Review / kvmfornfv.git / blobdiff