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