mirror of https://gitee.com/openkylin/linux.git
1240 lines
33 KiB
C
1240 lines
33 KiB
C
/*
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* linux/drivers/s390/crypto/zcrypt_api.c
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*
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* zcrypt 2.1.0
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*
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* Copyright (C) 2001, 2006 IBM Corporation
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* Author(s): Robert Burroughs
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* Eric Rossman (edrossma@us.ibm.com)
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* Cornelia Huck <cornelia.huck@de.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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*
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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/init.h>
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#include <linux/interrupt.h>
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#include <linux/miscdevice.h>
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#include <linux/fs.h>
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#include <linux/proc_fs.h>
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#include <linux/compat.h>
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#include <asm/atomic.h>
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#include <asm/uaccess.h>
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#include <linux/hw_random.h>
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#include "zcrypt_api.h"
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/*
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* Module description.
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*/
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MODULE_AUTHOR("IBM Corporation");
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MODULE_DESCRIPTION("Cryptographic Coprocessor interface, "
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"Copyright 2001, 2006 IBM Corporation");
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MODULE_LICENSE("GPL");
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static DEFINE_SPINLOCK(zcrypt_device_lock);
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static LIST_HEAD(zcrypt_device_list);
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static int zcrypt_device_count = 0;
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static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
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static int zcrypt_rng_device_add(void);
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static void zcrypt_rng_device_remove(void);
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/*
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* Device attributes common for all crypto devices.
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*/
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static ssize_t zcrypt_type_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct zcrypt_device *zdev = to_ap_dev(dev)->private;
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return snprintf(buf, PAGE_SIZE, "%s\n", zdev->type_string);
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}
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static DEVICE_ATTR(type, 0444, zcrypt_type_show, NULL);
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static ssize_t zcrypt_online_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct zcrypt_device *zdev = to_ap_dev(dev)->private;
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return snprintf(buf, PAGE_SIZE, "%d\n", zdev->online);
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}
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static ssize_t zcrypt_online_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct zcrypt_device *zdev = to_ap_dev(dev)->private;
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int online;
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if (sscanf(buf, "%d\n", &online) != 1 || online < 0 || online > 1)
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return -EINVAL;
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zdev->online = online;
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if (!online)
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ap_flush_queue(zdev->ap_dev);
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return count;
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}
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static DEVICE_ATTR(online, 0644, zcrypt_online_show, zcrypt_online_store);
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static struct attribute * zcrypt_device_attrs[] = {
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&dev_attr_type.attr,
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&dev_attr_online.attr,
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NULL,
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};
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static struct attribute_group zcrypt_device_attr_group = {
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.attrs = zcrypt_device_attrs,
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};
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/**
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* __zcrypt_increase_preference(): Increase preference of a crypto device.
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* @zdev: Pointer the crypto device
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*
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* Move the device towards the head of the device list.
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* Need to be called while holding the zcrypt device list lock.
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* Note: cards with speed_rating of 0 are kept at the end of the list.
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*/
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static void __zcrypt_increase_preference(struct zcrypt_device *zdev)
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{
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struct zcrypt_device *tmp;
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struct list_head *l;
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if (zdev->speed_rating == 0)
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return;
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for (l = zdev->list.prev; l != &zcrypt_device_list; l = l->prev) {
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tmp = list_entry(l, struct zcrypt_device, list);
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if ((tmp->request_count + 1) * tmp->speed_rating <=
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(zdev->request_count + 1) * zdev->speed_rating &&
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tmp->speed_rating != 0)
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break;
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}
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if (l == zdev->list.prev)
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return;
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/* Move zdev behind l */
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list_del(&zdev->list);
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list_add(&zdev->list, l);
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}
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/**
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* __zcrypt_decrease_preference(): Decrease preference of a crypto device.
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* @zdev: Pointer to a crypto device.
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*
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* Move the device towards the tail of the device list.
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* Need to be called while holding the zcrypt device list lock.
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* Note: cards with speed_rating of 0 are kept at the end of the list.
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*/
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static void __zcrypt_decrease_preference(struct zcrypt_device *zdev)
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{
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struct zcrypt_device *tmp;
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struct list_head *l;
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if (zdev->speed_rating == 0)
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return;
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for (l = zdev->list.next; l != &zcrypt_device_list; l = l->next) {
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tmp = list_entry(l, struct zcrypt_device, list);
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if ((tmp->request_count + 1) * tmp->speed_rating >
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(zdev->request_count + 1) * zdev->speed_rating ||
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tmp->speed_rating == 0)
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break;
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}
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if (l == zdev->list.next)
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return;
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/* Move zdev before l */
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list_del(&zdev->list);
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list_add_tail(&zdev->list, l);
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}
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static void zcrypt_device_release(struct kref *kref)
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{
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struct zcrypt_device *zdev =
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container_of(kref, struct zcrypt_device, refcount);
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zcrypt_device_free(zdev);
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}
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void zcrypt_device_get(struct zcrypt_device *zdev)
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{
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kref_get(&zdev->refcount);
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}
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EXPORT_SYMBOL(zcrypt_device_get);
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int zcrypt_device_put(struct zcrypt_device *zdev)
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{
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return kref_put(&zdev->refcount, zcrypt_device_release);
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}
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EXPORT_SYMBOL(zcrypt_device_put);
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struct zcrypt_device *zcrypt_device_alloc(size_t max_response_size)
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{
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struct zcrypt_device *zdev;
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zdev = kzalloc(sizeof(struct zcrypt_device), GFP_KERNEL);
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if (!zdev)
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return NULL;
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zdev->reply.message = kmalloc(max_response_size, GFP_KERNEL);
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if (!zdev->reply.message)
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goto out_free;
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zdev->reply.length = max_response_size;
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spin_lock_init(&zdev->lock);
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INIT_LIST_HEAD(&zdev->list);
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return zdev;
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out_free:
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kfree(zdev);
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return NULL;
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}
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EXPORT_SYMBOL(zcrypt_device_alloc);
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void zcrypt_device_free(struct zcrypt_device *zdev)
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{
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kfree(zdev->reply.message);
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kfree(zdev);
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}
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EXPORT_SYMBOL(zcrypt_device_free);
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/**
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* zcrypt_device_register() - Register a crypto device.
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* @zdev: Pointer to a crypto device
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*
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* Register a crypto device. Returns 0 if successful.
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*/
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int zcrypt_device_register(struct zcrypt_device *zdev)
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{
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int rc;
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rc = sysfs_create_group(&zdev->ap_dev->device.kobj,
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&zcrypt_device_attr_group);
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if (rc)
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goto out;
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get_device(&zdev->ap_dev->device);
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kref_init(&zdev->refcount);
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spin_lock_bh(&zcrypt_device_lock);
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zdev->online = 1; /* New devices are online by default. */
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list_add_tail(&zdev->list, &zcrypt_device_list);
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__zcrypt_increase_preference(zdev);
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zcrypt_device_count++;
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spin_unlock_bh(&zcrypt_device_lock);
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if (zdev->ops->rng) {
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rc = zcrypt_rng_device_add();
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if (rc)
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goto out_unregister;
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}
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return 0;
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out_unregister:
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spin_lock_bh(&zcrypt_device_lock);
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zcrypt_device_count--;
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list_del_init(&zdev->list);
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spin_unlock_bh(&zcrypt_device_lock);
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sysfs_remove_group(&zdev->ap_dev->device.kobj,
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&zcrypt_device_attr_group);
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put_device(&zdev->ap_dev->device);
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zcrypt_device_put(zdev);
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out:
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return rc;
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}
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EXPORT_SYMBOL(zcrypt_device_register);
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/**
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* zcrypt_device_unregister(): Unregister a crypto device.
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* @zdev: Pointer to crypto device
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*
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* Unregister a crypto device.
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*/
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void zcrypt_device_unregister(struct zcrypt_device *zdev)
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{
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if (zdev->ops->rng)
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zcrypt_rng_device_remove();
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spin_lock_bh(&zcrypt_device_lock);
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zcrypt_device_count--;
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list_del_init(&zdev->list);
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spin_unlock_bh(&zcrypt_device_lock);
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sysfs_remove_group(&zdev->ap_dev->device.kobj,
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&zcrypt_device_attr_group);
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put_device(&zdev->ap_dev->device);
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zcrypt_device_put(zdev);
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}
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EXPORT_SYMBOL(zcrypt_device_unregister);
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/**
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* zcrypt_read (): Not supported beyond zcrypt 1.3.1.
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*
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* This function is not supported beyond zcrypt 1.3.1.
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*/
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static ssize_t zcrypt_read(struct file *filp, char __user *buf,
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size_t count, loff_t *f_pos)
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{
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return -EPERM;
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}
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/**
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* zcrypt_write(): Not allowed.
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*
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* Write is is not allowed
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*/
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static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
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size_t count, loff_t *f_pos)
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{
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return -EPERM;
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}
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/**
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* zcrypt_open(): Count number of users.
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*
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* Device open function to count number of users.
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*/
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static int zcrypt_open(struct inode *inode, struct file *filp)
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{
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atomic_inc(&zcrypt_open_count);
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return 0;
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}
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/**
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* zcrypt_release(): Count number of users.
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*
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* Device close function to count number of users.
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*/
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static int zcrypt_release(struct inode *inode, struct file *filp)
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{
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atomic_dec(&zcrypt_open_count);
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return 0;
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}
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/*
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* zcrypt ioctls.
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*/
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static long zcrypt_rsa_modexpo(struct ica_rsa_modexpo *mex)
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{
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struct zcrypt_device *zdev;
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int rc;
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if (mex->outputdatalength < mex->inputdatalength)
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return -EINVAL;
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/*
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* As long as outputdatalength is big enough, we can set the
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* outputdatalength equal to the inputdatalength, since that is the
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* number of bytes we will copy in any case
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*/
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mex->outputdatalength = mex->inputdatalength;
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spin_lock_bh(&zcrypt_device_lock);
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list_for_each_entry(zdev, &zcrypt_device_list, list) {
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if (!zdev->online ||
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!zdev->ops->rsa_modexpo ||
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zdev->min_mod_size > mex->inputdatalength ||
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zdev->max_mod_size < mex->inputdatalength)
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continue;
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zcrypt_device_get(zdev);
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get_device(&zdev->ap_dev->device);
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zdev->request_count++;
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__zcrypt_decrease_preference(zdev);
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if (try_module_get(zdev->ap_dev->drv->driver.owner)) {
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spin_unlock_bh(&zcrypt_device_lock);
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rc = zdev->ops->rsa_modexpo(zdev, mex);
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spin_lock_bh(&zcrypt_device_lock);
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module_put(zdev->ap_dev->drv->driver.owner);
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}
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else
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rc = -EAGAIN;
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zdev->request_count--;
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__zcrypt_increase_preference(zdev);
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put_device(&zdev->ap_dev->device);
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zcrypt_device_put(zdev);
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spin_unlock_bh(&zcrypt_device_lock);
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return rc;
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}
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spin_unlock_bh(&zcrypt_device_lock);
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return -ENODEV;
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}
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static long zcrypt_rsa_crt(struct ica_rsa_modexpo_crt *crt)
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{
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struct zcrypt_device *zdev;
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unsigned long long z1, z2, z3;
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int rc, copied;
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if (crt->outputdatalength < crt->inputdatalength ||
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(crt->inputdatalength & 1))
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return -EINVAL;
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/*
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* As long as outputdatalength is big enough, we can set the
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* outputdatalength equal to the inputdatalength, since that is the
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* number of bytes we will copy in any case
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*/
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crt->outputdatalength = crt->inputdatalength;
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copied = 0;
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restart:
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spin_lock_bh(&zcrypt_device_lock);
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list_for_each_entry(zdev, &zcrypt_device_list, list) {
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if (!zdev->online ||
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!zdev->ops->rsa_modexpo_crt ||
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zdev->min_mod_size > crt->inputdatalength ||
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zdev->max_mod_size < crt->inputdatalength)
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continue;
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if (zdev->short_crt && crt->inputdatalength > 240) {
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/*
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* Check inputdata for leading zeros for cards
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* that can't handle np_prime, bp_key, or
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* u_mult_inv > 128 bytes.
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*/
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if (copied == 0) {
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int len;
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spin_unlock_bh(&zcrypt_device_lock);
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/* len is max 256 / 2 - 120 = 8 */
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len = crt->inputdatalength / 2 - 120;
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z1 = z2 = z3 = 0;
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if (copy_from_user(&z1, crt->np_prime, len) ||
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copy_from_user(&z2, crt->bp_key, len) ||
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copy_from_user(&z3, crt->u_mult_inv, len))
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return -EFAULT;
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copied = 1;
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/*
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* We have to restart device lookup -
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* the device list may have changed by now.
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*/
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goto restart;
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}
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if (z1 != 0ULL || z2 != 0ULL || z3 != 0ULL)
|
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/* The device can't handle this request. */
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continue;
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}
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zcrypt_device_get(zdev);
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get_device(&zdev->ap_dev->device);
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zdev->request_count++;
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__zcrypt_decrease_preference(zdev);
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if (try_module_get(zdev->ap_dev->drv->driver.owner)) {
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spin_unlock_bh(&zcrypt_device_lock);
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rc = zdev->ops->rsa_modexpo_crt(zdev, crt);
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spin_lock_bh(&zcrypt_device_lock);
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module_put(zdev->ap_dev->drv->driver.owner);
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}
|
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else
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rc = -EAGAIN;
|
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zdev->request_count--;
|
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__zcrypt_increase_preference(zdev);
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put_device(&zdev->ap_dev->device);
|
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zcrypt_device_put(zdev);
|
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spin_unlock_bh(&zcrypt_device_lock);
|
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return rc;
|
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}
|
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spin_unlock_bh(&zcrypt_device_lock);
|
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return -ENODEV;
|
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}
|
|
|
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static long zcrypt_send_cprb(struct ica_xcRB *xcRB)
|
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{
|
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struct zcrypt_device *zdev;
|
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int rc;
|
|
|
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spin_lock_bh(&zcrypt_device_lock);
|
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list_for_each_entry(zdev, &zcrypt_device_list, list) {
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if (!zdev->online || !zdev->ops->send_cprb ||
|
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(xcRB->user_defined != AUTOSELECT &&
|
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AP_QID_DEVICE(zdev->ap_dev->qid) != xcRB->user_defined)
|
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)
|
|
continue;
|
|
zcrypt_device_get(zdev);
|
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get_device(&zdev->ap_dev->device);
|
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zdev->request_count++;
|
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__zcrypt_decrease_preference(zdev);
|
|
if (try_module_get(zdev->ap_dev->drv->driver.owner)) {
|
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spin_unlock_bh(&zcrypt_device_lock);
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rc = zdev->ops->send_cprb(zdev, xcRB);
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spin_lock_bh(&zcrypt_device_lock);
|
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module_put(zdev->ap_dev->drv->driver.owner);
|
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}
|
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else
|
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rc = -EAGAIN;
|
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zdev->request_count--;
|
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__zcrypt_increase_preference(zdev);
|
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put_device(&zdev->ap_dev->device);
|
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zcrypt_device_put(zdev);
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spin_unlock_bh(&zcrypt_device_lock);
|
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return rc;
|
|
}
|
|
spin_unlock_bh(&zcrypt_device_lock);
|
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return -ENODEV;
|
|
}
|
|
|
|
static long zcrypt_rng(char *buffer)
|
|
{
|
|
struct zcrypt_device *zdev;
|
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int rc;
|
|
|
|
spin_lock_bh(&zcrypt_device_lock);
|
|
list_for_each_entry(zdev, &zcrypt_device_list, list) {
|
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if (!zdev->online || !zdev->ops->rng)
|
|
continue;
|
|
zcrypt_device_get(zdev);
|
|
get_device(&zdev->ap_dev->device);
|
|
zdev->request_count++;
|
|
__zcrypt_decrease_preference(zdev);
|
|
if (try_module_get(zdev->ap_dev->drv->driver.owner)) {
|
|
spin_unlock_bh(&zcrypt_device_lock);
|
|
rc = zdev->ops->rng(zdev, buffer);
|
|
spin_lock_bh(&zcrypt_device_lock);
|
|
module_put(zdev->ap_dev->drv->driver.owner);
|
|
} else
|
|
rc = -EAGAIN;
|
|
zdev->request_count--;
|
|
__zcrypt_increase_preference(zdev);
|
|
put_device(&zdev->ap_dev->device);
|
|
zcrypt_device_put(zdev);
|
|
spin_unlock_bh(&zcrypt_device_lock);
|
|
return rc;
|
|
}
|
|
spin_unlock_bh(&zcrypt_device_lock);
|
|
return -ENODEV;
|
|
}
|
|
|
|
static void zcrypt_status_mask(char status[AP_DEVICES])
|
|
{
|
|
struct zcrypt_device *zdev;
|
|
|
|
memset(status, 0, sizeof(char) * AP_DEVICES);
|
|
spin_lock_bh(&zcrypt_device_lock);
|
|
list_for_each_entry(zdev, &zcrypt_device_list, list)
|
|
status[AP_QID_DEVICE(zdev->ap_dev->qid)] =
|
|
zdev->online ? zdev->user_space_type : 0x0d;
|
|
spin_unlock_bh(&zcrypt_device_lock);
|
|
}
|
|
|
|
static void zcrypt_qdepth_mask(char qdepth[AP_DEVICES])
|
|
{
|
|
struct zcrypt_device *zdev;
|
|
|
|
memset(qdepth, 0, sizeof(char) * AP_DEVICES);
|
|
spin_lock_bh(&zcrypt_device_lock);
|
|
list_for_each_entry(zdev, &zcrypt_device_list, list) {
|
|
spin_lock(&zdev->ap_dev->lock);
|
|
qdepth[AP_QID_DEVICE(zdev->ap_dev->qid)] =
|
|
zdev->ap_dev->pendingq_count +
|
|
zdev->ap_dev->requestq_count;
|
|
spin_unlock(&zdev->ap_dev->lock);
|
|
}
|
|
spin_unlock_bh(&zcrypt_device_lock);
|
|
}
|
|
|
|
static void zcrypt_perdev_reqcnt(int reqcnt[AP_DEVICES])
|
|
{
|
|
struct zcrypt_device *zdev;
|
|
|
|
memset(reqcnt, 0, sizeof(int) * AP_DEVICES);
|
|
spin_lock_bh(&zcrypt_device_lock);
|
|
list_for_each_entry(zdev, &zcrypt_device_list, list) {
|
|
spin_lock(&zdev->ap_dev->lock);
|
|
reqcnt[AP_QID_DEVICE(zdev->ap_dev->qid)] =
|
|
zdev->ap_dev->total_request_count;
|
|
spin_unlock(&zdev->ap_dev->lock);
|
|
}
|
|
spin_unlock_bh(&zcrypt_device_lock);
|
|
}
|
|
|
|
static int zcrypt_pendingq_count(void)
|
|
{
|
|
struct zcrypt_device *zdev;
|
|
int pendingq_count = 0;
|
|
|
|
spin_lock_bh(&zcrypt_device_lock);
|
|
list_for_each_entry(zdev, &zcrypt_device_list, list) {
|
|
spin_lock(&zdev->ap_dev->lock);
|
|
pendingq_count += zdev->ap_dev->pendingq_count;
|
|
spin_unlock(&zdev->ap_dev->lock);
|
|
}
|
|
spin_unlock_bh(&zcrypt_device_lock);
|
|
return pendingq_count;
|
|
}
|
|
|
|
static int zcrypt_requestq_count(void)
|
|
{
|
|
struct zcrypt_device *zdev;
|
|
int requestq_count = 0;
|
|
|
|
spin_lock_bh(&zcrypt_device_lock);
|
|
list_for_each_entry(zdev, &zcrypt_device_list, list) {
|
|
spin_lock(&zdev->ap_dev->lock);
|
|
requestq_count += zdev->ap_dev->requestq_count;
|
|
spin_unlock(&zdev->ap_dev->lock);
|
|
}
|
|
spin_unlock_bh(&zcrypt_device_lock);
|
|
return requestq_count;
|
|
}
|
|
|
|
static int zcrypt_count_type(int type)
|
|
{
|
|
struct zcrypt_device *zdev;
|
|
int device_count = 0;
|
|
|
|
spin_lock_bh(&zcrypt_device_lock);
|
|
list_for_each_entry(zdev, &zcrypt_device_list, list)
|
|
if (zdev->user_space_type == type)
|
|
device_count++;
|
|
spin_unlock_bh(&zcrypt_device_lock);
|
|
return device_count;
|
|
}
|
|
|
|
/**
|
|
* zcrypt_ica_status(): Old, depracted combi status call.
|
|
*
|
|
* Old, deprecated combi status call.
|
|
*/
|
|
static long zcrypt_ica_status(struct file *filp, unsigned long arg)
|
|
{
|
|
struct ica_z90_status *pstat;
|
|
int ret;
|
|
|
|
pstat = kzalloc(sizeof(*pstat), GFP_KERNEL);
|
|
if (!pstat)
|
|
return -ENOMEM;
|
|
pstat->totalcount = zcrypt_device_count;
|
|
pstat->leedslitecount = zcrypt_count_type(ZCRYPT_PCICA);
|
|
pstat->leeds2count = zcrypt_count_type(ZCRYPT_PCICC);
|
|
pstat->requestqWaitCount = zcrypt_requestq_count();
|
|
pstat->pendingqWaitCount = zcrypt_pendingq_count();
|
|
pstat->totalOpenCount = atomic_read(&zcrypt_open_count);
|
|
pstat->cryptoDomain = ap_domain_index;
|
|
zcrypt_status_mask(pstat->status);
|
|
zcrypt_qdepth_mask(pstat->qdepth);
|
|
ret = 0;
|
|
if (copy_to_user((void __user *) arg, pstat, sizeof(*pstat)))
|
|
ret = -EFAULT;
|
|
kfree(pstat);
|
|
return ret;
|
|
}
|
|
|
|
static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
int rc;
|
|
|
|
switch (cmd) {
|
|
case ICARSAMODEXPO: {
|
|
struct ica_rsa_modexpo __user *umex = (void __user *) arg;
|
|
struct ica_rsa_modexpo mex;
|
|
if (copy_from_user(&mex, umex, sizeof(mex)))
|
|
return -EFAULT;
|
|
do {
|
|
rc = zcrypt_rsa_modexpo(&mex);
|
|
} while (rc == -EAGAIN);
|
|
if (rc)
|
|
return rc;
|
|
return put_user(mex.outputdatalength, &umex->outputdatalength);
|
|
}
|
|
case ICARSACRT: {
|
|
struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
|
|
struct ica_rsa_modexpo_crt crt;
|
|
if (copy_from_user(&crt, ucrt, sizeof(crt)))
|
|
return -EFAULT;
|
|
do {
|
|
rc = zcrypt_rsa_crt(&crt);
|
|
} while (rc == -EAGAIN);
|
|
if (rc)
|
|
return rc;
|
|
return put_user(crt.outputdatalength, &ucrt->outputdatalength);
|
|
}
|
|
case ZSECSENDCPRB: {
|
|
struct ica_xcRB __user *uxcRB = (void __user *) arg;
|
|
struct ica_xcRB xcRB;
|
|
if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
|
|
return -EFAULT;
|
|
do {
|
|
rc = zcrypt_send_cprb(&xcRB);
|
|
} while (rc == -EAGAIN);
|
|
if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
|
|
return -EFAULT;
|
|
return rc;
|
|
}
|
|
case Z90STAT_STATUS_MASK: {
|
|
char status[AP_DEVICES];
|
|
zcrypt_status_mask(status);
|
|
if (copy_to_user((char __user *) arg, status,
|
|
sizeof(char) * AP_DEVICES))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
case Z90STAT_QDEPTH_MASK: {
|
|
char qdepth[AP_DEVICES];
|
|
zcrypt_qdepth_mask(qdepth);
|
|
if (copy_to_user((char __user *) arg, qdepth,
|
|
sizeof(char) * AP_DEVICES))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
case Z90STAT_PERDEV_REQCNT: {
|
|
int reqcnt[AP_DEVICES];
|
|
zcrypt_perdev_reqcnt(reqcnt);
|
|
if (copy_to_user((int __user *) arg, reqcnt,
|
|
sizeof(int) * AP_DEVICES))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
case Z90STAT_REQUESTQ_COUNT:
|
|
return put_user(zcrypt_requestq_count(), (int __user *) arg);
|
|
case Z90STAT_PENDINGQ_COUNT:
|
|
return put_user(zcrypt_pendingq_count(), (int __user *) arg);
|
|
case Z90STAT_TOTALOPEN_COUNT:
|
|
return put_user(atomic_read(&zcrypt_open_count),
|
|
(int __user *) arg);
|
|
case Z90STAT_DOMAIN_INDEX:
|
|
return put_user(ap_domain_index, (int __user *) arg);
|
|
/*
|
|
* Deprecated ioctls. Don't add another device count ioctl,
|
|
* you can count them yourself in the user space with the
|
|
* output of the Z90STAT_STATUS_MASK ioctl.
|
|
*/
|
|
case ICAZ90STATUS:
|
|
return zcrypt_ica_status(filp, arg);
|
|
case Z90STAT_TOTALCOUNT:
|
|
return put_user(zcrypt_device_count, (int __user *) arg);
|
|
case Z90STAT_PCICACOUNT:
|
|
return put_user(zcrypt_count_type(ZCRYPT_PCICA),
|
|
(int __user *) arg);
|
|
case Z90STAT_PCICCCOUNT:
|
|
return put_user(zcrypt_count_type(ZCRYPT_PCICC),
|
|
(int __user *) arg);
|
|
case Z90STAT_PCIXCCMCL2COUNT:
|
|
return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2),
|
|
(int __user *) arg);
|
|
case Z90STAT_PCIXCCMCL3COUNT:
|
|
return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL3),
|
|
(int __user *) arg);
|
|
case Z90STAT_PCIXCCCOUNT:
|
|
return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2) +
|
|
zcrypt_count_type(ZCRYPT_PCIXCC_MCL3),
|
|
(int __user *) arg);
|
|
case Z90STAT_CEX2CCOUNT:
|
|
return put_user(zcrypt_count_type(ZCRYPT_CEX2C),
|
|
(int __user *) arg);
|
|
case Z90STAT_CEX2ACOUNT:
|
|
return put_user(zcrypt_count_type(ZCRYPT_CEX2A),
|
|
(int __user *) arg);
|
|
default:
|
|
/* unknown ioctl number */
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
/*
|
|
* ioctl32 conversion routines
|
|
*/
|
|
struct compat_ica_rsa_modexpo {
|
|
compat_uptr_t inputdata;
|
|
unsigned int inputdatalength;
|
|
compat_uptr_t outputdata;
|
|
unsigned int outputdatalength;
|
|
compat_uptr_t b_key;
|
|
compat_uptr_t n_modulus;
|
|
};
|
|
|
|
static long trans_modexpo32(struct file *filp, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
|
|
struct compat_ica_rsa_modexpo mex32;
|
|
struct ica_rsa_modexpo mex64;
|
|
long rc;
|
|
|
|
if (copy_from_user(&mex32, umex32, sizeof(mex32)))
|
|
return -EFAULT;
|
|
mex64.inputdata = compat_ptr(mex32.inputdata);
|
|
mex64.inputdatalength = mex32.inputdatalength;
|
|
mex64.outputdata = compat_ptr(mex32.outputdata);
|
|
mex64.outputdatalength = mex32.outputdatalength;
|
|
mex64.b_key = compat_ptr(mex32.b_key);
|
|
mex64.n_modulus = compat_ptr(mex32.n_modulus);
|
|
do {
|
|
rc = zcrypt_rsa_modexpo(&mex64);
|
|
} while (rc == -EAGAIN);
|
|
if (!rc)
|
|
rc = put_user(mex64.outputdatalength,
|
|
&umex32->outputdatalength);
|
|
return rc;
|
|
}
|
|
|
|
struct compat_ica_rsa_modexpo_crt {
|
|
compat_uptr_t inputdata;
|
|
unsigned int inputdatalength;
|
|
compat_uptr_t outputdata;
|
|
unsigned int outputdatalength;
|
|
compat_uptr_t bp_key;
|
|
compat_uptr_t bq_key;
|
|
compat_uptr_t np_prime;
|
|
compat_uptr_t nq_prime;
|
|
compat_uptr_t u_mult_inv;
|
|
};
|
|
|
|
static long trans_modexpo_crt32(struct file *filp, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
|
|
struct compat_ica_rsa_modexpo_crt crt32;
|
|
struct ica_rsa_modexpo_crt crt64;
|
|
long rc;
|
|
|
|
if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
|
|
return -EFAULT;
|
|
crt64.inputdata = compat_ptr(crt32.inputdata);
|
|
crt64.inputdatalength = crt32.inputdatalength;
|
|
crt64.outputdata= compat_ptr(crt32.outputdata);
|
|
crt64.outputdatalength = crt32.outputdatalength;
|
|
crt64.bp_key = compat_ptr(crt32.bp_key);
|
|
crt64.bq_key = compat_ptr(crt32.bq_key);
|
|
crt64.np_prime = compat_ptr(crt32.np_prime);
|
|
crt64.nq_prime = compat_ptr(crt32.nq_prime);
|
|
crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
|
|
do {
|
|
rc = zcrypt_rsa_crt(&crt64);
|
|
} while (rc == -EAGAIN);
|
|
if (!rc)
|
|
rc = put_user(crt64.outputdatalength,
|
|
&ucrt32->outputdatalength);
|
|
return rc;
|
|
}
|
|
|
|
struct compat_ica_xcRB {
|
|
unsigned short agent_ID;
|
|
unsigned int user_defined;
|
|
unsigned short request_ID;
|
|
unsigned int request_control_blk_length;
|
|
unsigned char padding1[16 - sizeof (compat_uptr_t)];
|
|
compat_uptr_t request_control_blk_addr;
|
|
unsigned int request_data_length;
|
|
char padding2[16 - sizeof (compat_uptr_t)];
|
|
compat_uptr_t request_data_address;
|
|
unsigned int reply_control_blk_length;
|
|
char padding3[16 - sizeof (compat_uptr_t)];
|
|
compat_uptr_t reply_control_blk_addr;
|
|
unsigned int reply_data_length;
|
|
char padding4[16 - sizeof (compat_uptr_t)];
|
|
compat_uptr_t reply_data_addr;
|
|
unsigned short priority_window;
|
|
unsigned int status;
|
|
} __attribute__((packed));
|
|
|
|
static long trans_xcRB32(struct file *filp, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
|
|
struct compat_ica_xcRB xcRB32;
|
|
struct ica_xcRB xcRB64;
|
|
long rc;
|
|
|
|
if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
|
|
return -EFAULT;
|
|
xcRB64.agent_ID = xcRB32.agent_ID;
|
|
xcRB64.user_defined = xcRB32.user_defined;
|
|
xcRB64.request_ID = xcRB32.request_ID;
|
|
xcRB64.request_control_blk_length =
|
|
xcRB32.request_control_blk_length;
|
|
xcRB64.request_control_blk_addr =
|
|
compat_ptr(xcRB32.request_control_blk_addr);
|
|
xcRB64.request_data_length =
|
|
xcRB32.request_data_length;
|
|
xcRB64.request_data_address =
|
|
compat_ptr(xcRB32.request_data_address);
|
|
xcRB64.reply_control_blk_length =
|
|
xcRB32.reply_control_blk_length;
|
|
xcRB64.reply_control_blk_addr =
|
|
compat_ptr(xcRB32.reply_control_blk_addr);
|
|
xcRB64.reply_data_length = xcRB32.reply_data_length;
|
|
xcRB64.reply_data_addr =
|
|
compat_ptr(xcRB32.reply_data_addr);
|
|
xcRB64.priority_window = xcRB32.priority_window;
|
|
xcRB64.status = xcRB32.status;
|
|
do {
|
|
rc = zcrypt_send_cprb(&xcRB64);
|
|
} while (rc == -EAGAIN);
|
|
xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
|
|
xcRB32.reply_data_length = xcRB64.reply_data_length;
|
|
xcRB32.status = xcRB64.status;
|
|
if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
|
|
return -EFAULT;
|
|
return rc;
|
|
}
|
|
|
|
static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
if (cmd == ICARSAMODEXPO)
|
|
return trans_modexpo32(filp, cmd, arg);
|
|
if (cmd == ICARSACRT)
|
|
return trans_modexpo_crt32(filp, cmd, arg);
|
|
if (cmd == ZSECSENDCPRB)
|
|
return trans_xcRB32(filp, cmd, arg);
|
|
return zcrypt_unlocked_ioctl(filp, cmd, arg);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Misc device file operations.
|
|
*/
|
|
static const struct file_operations zcrypt_fops = {
|
|
.owner = THIS_MODULE,
|
|
.read = zcrypt_read,
|
|
.write = zcrypt_write,
|
|
.unlocked_ioctl = zcrypt_unlocked_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = zcrypt_compat_ioctl,
|
|
#endif
|
|
.open = zcrypt_open,
|
|
.release = zcrypt_release
|
|
};
|
|
|
|
/*
|
|
* Misc device.
|
|
*/
|
|
static struct miscdevice zcrypt_misc_device = {
|
|
.minor = MISC_DYNAMIC_MINOR,
|
|
.name = "z90crypt",
|
|
.fops = &zcrypt_fops,
|
|
};
|
|
|
|
/*
|
|
* Deprecated /proc entry support.
|
|
*/
|
|
static struct proc_dir_entry *zcrypt_entry;
|
|
|
|
static int sprintcl(unsigned char *outaddr, unsigned char *addr,
|
|
unsigned int len)
|
|
{
|
|
int hl, i;
|
|
|
|
hl = 0;
|
|
for (i = 0; i < len; i++)
|
|
hl += sprintf(outaddr+hl, "%01x", (unsigned int) addr[i]);
|
|
hl += sprintf(outaddr+hl, " ");
|
|
return hl;
|
|
}
|
|
|
|
static int sprintrw(unsigned char *outaddr, unsigned char *addr,
|
|
unsigned int len)
|
|
{
|
|
int hl, inl, c, cx;
|
|
|
|
hl = sprintf(outaddr, " ");
|
|
inl = 0;
|
|
for (c = 0; c < (len / 16); c++) {
|
|
hl += sprintcl(outaddr+hl, addr+inl, 16);
|
|
inl += 16;
|
|
}
|
|
cx = len%16;
|
|
if (cx) {
|
|
hl += sprintcl(outaddr+hl, addr+inl, cx);
|
|
inl += cx;
|
|
}
|
|
hl += sprintf(outaddr+hl, "\n");
|
|
return hl;
|
|
}
|
|
|
|
static int sprinthx(unsigned char *title, unsigned char *outaddr,
|
|
unsigned char *addr, unsigned int len)
|
|
{
|
|
int hl, inl, r, rx;
|
|
|
|
hl = sprintf(outaddr, "\n%s\n", title);
|
|
inl = 0;
|
|
for (r = 0; r < (len / 64); r++) {
|
|
hl += sprintrw(outaddr+hl, addr+inl, 64);
|
|
inl += 64;
|
|
}
|
|
rx = len % 64;
|
|
if (rx) {
|
|
hl += sprintrw(outaddr+hl, addr+inl, rx);
|
|
inl += rx;
|
|
}
|
|
hl += sprintf(outaddr+hl, "\n");
|
|
return hl;
|
|
}
|
|
|
|
static int sprinthx4(unsigned char *title, unsigned char *outaddr,
|
|
unsigned int *array, unsigned int len)
|
|
{
|
|
int hl, r;
|
|
|
|
hl = sprintf(outaddr, "\n%s\n", title);
|
|
for (r = 0; r < len; r++) {
|
|
if ((r % 8) == 0)
|
|
hl += sprintf(outaddr+hl, " ");
|
|
hl += sprintf(outaddr+hl, "%08X ", array[r]);
|
|
if ((r % 8) == 7)
|
|
hl += sprintf(outaddr+hl, "\n");
|
|
}
|
|
hl += sprintf(outaddr+hl, "\n");
|
|
return hl;
|
|
}
|
|
|
|
static int zcrypt_status_read(char *resp_buff, char **start, off_t offset,
|
|
int count, int *eof, void *data)
|
|
{
|
|
unsigned char *workarea;
|
|
int len;
|
|
|
|
len = 0;
|
|
|
|
/* resp_buff is a page. Use the right half for a work area */
|
|
workarea = resp_buff + 2000;
|
|
len += sprintf(resp_buff + len, "\nzcrypt version: %d.%d.%d\n",
|
|
ZCRYPT_VERSION, ZCRYPT_RELEASE, ZCRYPT_VARIANT);
|
|
len += sprintf(resp_buff + len, "Cryptographic domain: %d\n",
|
|
ap_domain_index);
|
|
len += sprintf(resp_buff + len, "Total device count: %d\n",
|
|
zcrypt_device_count);
|
|
len += sprintf(resp_buff + len, "PCICA count: %d\n",
|
|
zcrypt_count_type(ZCRYPT_PCICA));
|
|
len += sprintf(resp_buff + len, "PCICC count: %d\n",
|
|
zcrypt_count_type(ZCRYPT_PCICC));
|
|
len += sprintf(resp_buff + len, "PCIXCC MCL2 count: %d\n",
|
|
zcrypt_count_type(ZCRYPT_PCIXCC_MCL2));
|
|
len += sprintf(resp_buff + len, "PCIXCC MCL3 count: %d\n",
|
|
zcrypt_count_type(ZCRYPT_PCIXCC_MCL3));
|
|
len += sprintf(resp_buff + len, "CEX2C count: %d\n",
|
|
zcrypt_count_type(ZCRYPT_CEX2C));
|
|
len += sprintf(resp_buff + len, "CEX2A count: %d\n",
|
|
zcrypt_count_type(ZCRYPT_CEX2A));
|
|
len += sprintf(resp_buff + len, "requestq count: %d\n",
|
|
zcrypt_requestq_count());
|
|
len += sprintf(resp_buff + len, "pendingq count: %d\n",
|
|
zcrypt_pendingq_count());
|
|
len += sprintf(resp_buff + len, "Total open handles: %d\n\n",
|
|
atomic_read(&zcrypt_open_count));
|
|
zcrypt_status_mask(workarea);
|
|
len += sprinthx("Online devices: 1=PCICA 2=PCICC 3=PCIXCC(MCL2) "
|
|
"4=PCIXCC(MCL3) 5=CEX2C 6=CEX2A",
|
|
resp_buff+len, workarea, AP_DEVICES);
|
|
zcrypt_qdepth_mask(workarea);
|
|
len += sprinthx("Waiting work element counts",
|
|
resp_buff+len, workarea, AP_DEVICES);
|
|
zcrypt_perdev_reqcnt((int *) workarea);
|
|
len += sprinthx4("Per-device successfully completed request counts",
|
|
resp_buff+len,(unsigned int *) workarea, AP_DEVICES);
|
|
*eof = 1;
|
|
memset((void *) workarea, 0x00, AP_DEVICES * sizeof(unsigned int));
|
|
return len;
|
|
}
|
|
|
|
static void zcrypt_disable_card(int index)
|
|
{
|
|
struct zcrypt_device *zdev;
|
|
|
|
spin_lock_bh(&zcrypt_device_lock);
|
|
list_for_each_entry(zdev, &zcrypt_device_list, list)
|
|
if (AP_QID_DEVICE(zdev->ap_dev->qid) == index) {
|
|
zdev->online = 0;
|
|
ap_flush_queue(zdev->ap_dev);
|
|
break;
|
|
}
|
|
spin_unlock_bh(&zcrypt_device_lock);
|
|
}
|
|
|
|
static void zcrypt_enable_card(int index)
|
|
{
|
|
struct zcrypt_device *zdev;
|
|
|
|
spin_lock_bh(&zcrypt_device_lock);
|
|
list_for_each_entry(zdev, &zcrypt_device_list, list)
|
|
if (AP_QID_DEVICE(zdev->ap_dev->qid) == index) {
|
|
zdev->online = 1;
|
|
break;
|
|
}
|
|
spin_unlock_bh(&zcrypt_device_lock);
|
|
}
|
|
|
|
static int zcrypt_status_write(struct file *file, const char __user *buffer,
|
|
unsigned long count, void *data)
|
|
{
|
|
unsigned char *lbuf, *ptr;
|
|
unsigned long local_count;
|
|
int j;
|
|
|
|
if (count <= 0)
|
|
return 0;
|
|
|
|
#define LBUFSIZE 1200UL
|
|
lbuf = kmalloc(LBUFSIZE, GFP_KERNEL);
|
|
if (!lbuf) {
|
|
PRINTK("kmalloc failed!\n");
|
|
return 0;
|
|
}
|
|
|
|
local_count = min(LBUFSIZE - 1, count);
|
|
if (copy_from_user(lbuf, buffer, local_count) != 0) {
|
|
kfree(lbuf);
|
|
return -EFAULT;
|
|
}
|
|
lbuf[local_count] = '\0';
|
|
|
|
ptr = strstr(lbuf, "Online devices");
|
|
if (!ptr) {
|
|
PRINTK("Unable to parse data (missing \"Online devices\")\n");
|
|
goto out;
|
|
}
|
|
ptr = strstr(ptr, "\n");
|
|
if (!ptr) {
|
|
PRINTK("Unable to parse data (missing newline "
|
|
"after \"Online devices\")\n");
|
|
goto out;
|
|
}
|
|
ptr++;
|
|
|
|
if (strstr(ptr, "Waiting work element counts") == NULL) {
|
|
PRINTK("Unable to parse data (missing "
|
|
"\"Waiting work element counts\")\n");
|
|
goto out;
|
|
}
|
|
|
|
for (j = 0; j < 64 && *ptr; ptr++) {
|
|
/*
|
|
* '0' for no device, '1' for PCICA, '2' for PCICC,
|
|
* '3' for PCIXCC_MCL2, '4' for PCIXCC_MCL3,
|
|
* '5' for CEX2C and '6' for CEX2A'
|
|
*/
|
|
if (*ptr >= '0' && *ptr <= '6')
|
|
j++;
|
|
else if (*ptr == 'd' || *ptr == 'D')
|
|
zcrypt_disable_card(j++);
|
|
else if (*ptr == 'e' || *ptr == 'E')
|
|
zcrypt_enable_card(j++);
|
|
else if (*ptr != ' ' && *ptr != '\t')
|
|
break;
|
|
}
|
|
out:
|
|
kfree(lbuf);
|
|
return count;
|
|
}
|
|
|
|
static int zcrypt_rng_device_count;
|
|
static u32 *zcrypt_rng_buffer;
|
|
static int zcrypt_rng_buffer_index;
|
|
static DEFINE_MUTEX(zcrypt_rng_mutex);
|
|
|
|
static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
|
|
{
|
|
int rc;
|
|
|
|
/*
|
|
* We don't need locking here because the RNG API guarantees serialized
|
|
* read method calls.
|
|
*/
|
|
if (zcrypt_rng_buffer_index == 0) {
|
|
rc = zcrypt_rng((char *) zcrypt_rng_buffer);
|
|
if (rc < 0)
|
|
return -EIO;
|
|
zcrypt_rng_buffer_index = rc / sizeof *data;
|
|
}
|
|
*data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
|
|
return sizeof *data;
|
|
}
|
|
|
|
static struct hwrng zcrypt_rng_dev = {
|
|
.name = "zcrypt",
|
|
.data_read = zcrypt_rng_data_read,
|
|
};
|
|
|
|
static int zcrypt_rng_device_add(void)
|
|
{
|
|
int rc = 0;
|
|
|
|
mutex_lock(&zcrypt_rng_mutex);
|
|
if (zcrypt_rng_device_count == 0) {
|
|
zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
|
|
if (!zcrypt_rng_buffer) {
|
|
rc = -ENOMEM;
|
|
goto out;
|
|
}
|
|
zcrypt_rng_buffer_index = 0;
|
|
rc = hwrng_register(&zcrypt_rng_dev);
|
|
if (rc)
|
|
goto out_free;
|
|
zcrypt_rng_device_count = 1;
|
|
} else
|
|
zcrypt_rng_device_count++;
|
|
mutex_unlock(&zcrypt_rng_mutex);
|
|
return 0;
|
|
|
|
out_free:
|
|
free_page((unsigned long) zcrypt_rng_buffer);
|
|
out:
|
|
mutex_unlock(&zcrypt_rng_mutex);
|
|
return rc;
|
|
}
|
|
|
|
static void zcrypt_rng_device_remove(void)
|
|
{
|
|
mutex_lock(&zcrypt_rng_mutex);
|
|
zcrypt_rng_device_count--;
|
|
if (zcrypt_rng_device_count == 0) {
|
|
hwrng_unregister(&zcrypt_rng_dev);
|
|
free_page((unsigned long) zcrypt_rng_buffer);
|
|
}
|
|
mutex_unlock(&zcrypt_rng_mutex);
|
|
}
|
|
|
|
/**
|
|
* zcrypt_api_init(): Module initialization.
|
|
*
|
|
* The module initialization code.
|
|
*/
|
|
int __init zcrypt_api_init(void)
|
|
{
|
|
int rc;
|
|
|
|
/* Register the request sprayer. */
|
|
rc = misc_register(&zcrypt_misc_device);
|
|
if (rc < 0) {
|
|
PRINTKW(KERN_ERR "misc_register (minor %d) failed with %d\n",
|
|
zcrypt_misc_device.minor, rc);
|
|
goto out;
|
|
}
|
|
|
|
/* Set up the proc file system */
|
|
zcrypt_entry = create_proc_entry("driver/z90crypt", 0644, NULL);
|
|
if (!zcrypt_entry) {
|
|
PRINTK("Couldn't create z90crypt proc entry\n");
|
|
rc = -ENOMEM;
|
|
goto out_misc;
|
|
}
|
|
zcrypt_entry->data = NULL;
|
|
zcrypt_entry->read_proc = zcrypt_status_read;
|
|
zcrypt_entry->write_proc = zcrypt_status_write;
|
|
|
|
return 0;
|
|
|
|
out_misc:
|
|
misc_deregister(&zcrypt_misc_device);
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* zcrypt_api_exit(): Module termination.
|
|
*
|
|
* The module termination code.
|
|
*/
|
|
void zcrypt_api_exit(void)
|
|
{
|
|
remove_proc_entry("driver/z90crypt", NULL);
|
|
misc_deregister(&zcrypt_misc_device);
|
|
}
|
|
|
|
#ifndef CONFIG_ZCRYPT_MONOLITHIC
|
|
module_init(zcrypt_api_init);
|
|
module_exit(zcrypt_api_exit);
|
|
#endif
|