--- /dev/null
+/*
+ * linux/drivers/s390/crypto/zcrypt_api.c
+ *
+ * zcrypt 2.0.0
+ *
+ * Copyright (C) 2001, 2006 IBM Corporation
+ * Author(s): Robert Burroughs
+ * Eric Rossman (edrossma@us.ibm.com)
+ * Cornelia Huck <cornelia.huck@de.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>
+ *
+ * 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/init.h>
+#include <linux/interrupt.h>
+#include <linux/miscdevice.h>
+#include <linux/fs.h>
+#include <linux/proc_fs.h>
+#include <linux/compat.h>
+#include <asm/atomic.h>
+#include <asm/uaccess.h>
+
+#include "zcrypt_api.h"
+
+/**
+ * Module description.
+ */
+MODULE_AUTHOR("IBM Corporation");
+MODULE_DESCRIPTION("Cryptographic Coprocessor interface, "
+ "Copyright 2001, 2006 IBM Corporation");
+MODULE_LICENSE("GPL");
+
+static DEFINE_SPINLOCK(zcrypt_device_lock);
+static LIST_HEAD(zcrypt_device_list);
+static int zcrypt_device_count = 0;
+static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
+
+/**
+ * Device attributes common for all crypto devices.
+ */
+static ssize_t zcrypt_type_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct zcrypt_device *zdev = to_ap_dev(dev)->private;
+ return snprintf(buf, PAGE_SIZE, "%s\n", zdev->type_string);
+}
+
+static DEVICE_ATTR(type, 0444, zcrypt_type_show, NULL);
+
+static ssize_t zcrypt_online_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct zcrypt_device *zdev = to_ap_dev(dev)->private;
+ return snprintf(buf, PAGE_SIZE, "%d\n", zdev->online);
+}
+
+static ssize_t zcrypt_online_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct zcrypt_device *zdev = to_ap_dev(dev)->private;
+ int online;
+
+ if (sscanf(buf, "%d\n", &online) != 1 || online < 0 || online > 1)
+ return -EINVAL;
+ zdev->online = online;
+ if (!online)
+ ap_flush_queue(zdev->ap_dev);
+ return count;
+}
+
+static DEVICE_ATTR(online, 0644, zcrypt_online_show, zcrypt_online_store);
+
+static struct attribute * zcrypt_device_attrs[] = {
+ &dev_attr_type.attr,
+ &dev_attr_online.attr,
+ NULL,
+};
+
+static struct attribute_group zcrypt_device_attr_group = {
+ .attrs = zcrypt_device_attrs,
+};
+
+/**
+ * Move the device towards the head of the device list.
+ * Need to be called while holding the zcrypt device list lock.
+ * Note: cards with speed_rating of 0 are kept at the end of the list.
+ */
+static void __zcrypt_increase_preference(struct zcrypt_device *zdev)
+{
+ struct zcrypt_device *tmp;
+ struct list_head *l;
+
+ if (zdev->speed_rating == 0)
+ return;
+ for (l = zdev->list.prev; l != &zcrypt_device_list; l = l->prev) {
+ tmp = list_entry(l, struct zcrypt_device, list);
+ if ((tmp->request_count + 1) * tmp->speed_rating <=
+ (zdev->request_count + 1) * zdev->speed_rating &&
+ tmp->speed_rating != 0)
+ break;
+ }
+ if (l == zdev->list.prev)
+ return;
+ /* Move zdev behind l */
+ list_del(&zdev->list);
+ list_add(&zdev->list, l);
+}
+
+/**
+ * Move the device towards the tail of the device list.
+ * Need to be called while holding the zcrypt device list lock.
+ * Note: cards with speed_rating of 0 are kept at the end of the list.
+ */
+static void __zcrypt_decrease_preference(struct zcrypt_device *zdev)
+{
+ struct zcrypt_device *tmp;
+ struct list_head *l;
+
+ if (zdev->speed_rating == 0)
+ return;
+ for (l = zdev->list.next; l != &zcrypt_device_list; l = l->next) {
+ tmp = list_entry(l, struct zcrypt_device, list);
+ if ((tmp->request_count + 1) * tmp->speed_rating >
+ (zdev->request_count + 1) * zdev->speed_rating ||
+ tmp->speed_rating == 0)
+ break;
+ }
+ if (l == zdev->list.next)
+ return;
+ /* Move zdev before l */
+ list_del(&zdev->list);
+ list_add_tail(&zdev->list, l);
+}
+
+static void zcrypt_device_release(struct kref *kref)
+{
+ struct zcrypt_device *zdev =
+ container_of(kref, struct zcrypt_device, refcount);
+ zcrypt_device_free(zdev);
+}
+
+void zcrypt_device_get(struct zcrypt_device *zdev)
+{
+ kref_get(&zdev->refcount);
+}
+EXPORT_SYMBOL(zcrypt_device_get);
+
+int zcrypt_device_put(struct zcrypt_device *zdev)
+{
+ return kref_put(&zdev->refcount, zcrypt_device_release);
+}
+EXPORT_SYMBOL(zcrypt_device_put);
+
+struct zcrypt_device *zcrypt_device_alloc(size_t max_response_size)
+{
+ struct zcrypt_device *zdev;
+
+ zdev = kzalloc(sizeof(struct zcrypt_device), GFP_KERNEL);
+ if (!zdev)
+ return NULL;
+ zdev->reply.message = kmalloc(max_response_size, GFP_KERNEL);
+ if (!zdev->reply.message)
+ goto out_free;
+ zdev->reply.length = max_response_size;
+ spin_lock_init(&zdev->lock);
+ INIT_LIST_HEAD(&zdev->list);
+ return zdev;
+
+out_free:
+ kfree(zdev);
+ return NULL;
+}
+EXPORT_SYMBOL(zcrypt_device_alloc);
+
+void zcrypt_device_free(struct zcrypt_device *zdev)
+{
+ kfree(zdev->reply.message);
+ kfree(zdev);
+}
+EXPORT_SYMBOL(zcrypt_device_free);
+
+/**
+ * Register a crypto device.
+ */
+int zcrypt_device_register(struct zcrypt_device *zdev)
+{
+ int rc;
+
+ rc = sysfs_create_group(&zdev->ap_dev->device.kobj,
+ &zcrypt_device_attr_group);
+ if (rc)
+ goto out;
+ get_device(&zdev->ap_dev->device);
+ kref_init(&zdev->refcount);
+ spin_lock_bh(&zcrypt_device_lock);
+ zdev->online = 1; /* New devices are online by default. */
+ list_add_tail(&zdev->list, &zcrypt_device_list);
+ __zcrypt_increase_preference(zdev);
+ zcrypt_device_count++;
+ spin_unlock_bh(&zcrypt_device_lock);
+out:
+ return rc;
+}
+EXPORT_SYMBOL(zcrypt_device_register);
+
+/**
+ * Unregister a crypto device.
+ */
+void zcrypt_device_unregister(struct zcrypt_device *zdev)
+{
+ spin_lock_bh(&zcrypt_device_lock);
+ zcrypt_device_count--;
+ list_del_init(&zdev->list);
+ spin_unlock_bh(&zcrypt_device_lock);
+ sysfs_remove_group(&zdev->ap_dev->device.kobj,
+ &zcrypt_device_attr_group);
+ put_device(&zdev->ap_dev->device);
+ zcrypt_device_put(zdev);
+}
+EXPORT_SYMBOL(zcrypt_device_unregister);
+
+/**
+ * zcrypt_read is not be supported beyond zcrypt 1.3.1
+ */
+static ssize_t zcrypt_read(struct file *filp, char __user *buf,
+ size_t count, loff_t *f_pos)
+{
+ return -EPERM;
+}
+
+/**
+ * Write is is not allowed
+ */
+static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
+ size_t count, loff_t *f_pos)
+{
+ return -EPERM;
+}
+
+/**
+ * Device open/close functions to count number of users.
+ */
+static int zcrypt_open(struct inode *inode, struct file *filp)
+{
+ atomic_inc(&zcrypt_open_count);
+ return 0;
+}
+
+static int zcrypt_release(struct inode *inode, struct file *filp)
+{
+ atomic_dec(&zcrypt_open_count);
+ return 0;
+}
+
+/**
+ * zcrypt ioctls.
+ */
+static long zcrypt_rsa_modexpo(struct ica_rsa_modexpo *mex)
+{
+ struct zcrypt_device *zdev;
+ int rc;
+
+ if (mex->outputdatalength < mex->inputdatalength)
+ return -EINVAL;
+ /**
+ * As long as outputdatalength is big enough, we can set the
+ * outputdatalength equal to the inputdatalength, since that is the
+ * number of bytes we will copy in any case
+ */
+ mex->outputdatalength = mex->inputdatalength;
+
+ spin_lock_bh(&zcrypt_device_lock);
+ list_for_each_entry(zdev, &zcrypt_device_list, list) {
+ if (!zdev->online ||
+ !zdev->ops->rsa_modexpo ||
+ zdev->min_mod_size > mex->inputdatalength ||
+ zdev->max_mod_size < mex->inputdatalength)
+ continue;
+ zcrypt_device_get(zdev);
+ get_device(&zdev->ap_dev->device);
+ zdev->request_count++;
+ __zcrypt_decrease_preference(zdev);
+ spin_unlock_bh(&zcrypt_device_lock);
+ if (try_module_get(zdev->ap_dev->drv->driver.owner)) {
+ rc = zdev->ops->rsa_modexpo(zdev, mex);
+ module_put(zdev->ap_dev->drv->driver.owner);
+ }
+ else
+ rc = -EAGAIN;
+ spin_lock_bh(&zcrypt_device_lock);
+ 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 long zcrypt_rsa_crt(struct ica_rsa_modexpo_crt *crt)
+{
+ struct zcrypt_device *zdev;
+ unsigned long long z1, z2, z3;
+ int rc, copied;
+
+ if (crt->outputdatalength < crt->inputdatalength ||
+ (crt->inputdatalength & 1))
+ return -EINVAL;
+ /**
+ * As long as outputdatalength is big enough, we can set the
+ * outputdatalength equal to the inputdatalength, since that is the
+ * number of bytes we will copy in any case
+ */
+ crt->outputdatalength = crt->inputdatalength;
+
+ copied = 0;
+ restart:
+ spin_lock_bh(&zcrypt_device_lock);
+ list_for_each_entry(zdev, &zcrypt_device_list, list) {
+ if (!zdev->online ||
+ !zdev->ops->rsa_modexpo_crt ||
+ zdev->min_mod_size > crt->inputdatalength ||
+ zdev->max_mod_size < crt->inputdatalength)
+ continue;
+ if (zdev->short_crt && crt->inputdatalength > 240) {
+ /**
+ * Check inputdata for leading zeros for cards
+ * that can't handle np_prime, bp_key, or
+ * u_mult_inv > 128 bytes.
+ */
+ if (copied == 0) {
+ int len;
+ spin_unlock_bh(&zcrypt_device_lock);
+ /* len is max 256 / 2 - 120 = 8 */
+ len = crt->inputdatalength / 2 - 120;
+ z1 = z2 = z3 = 0;
+ if (copy_from_user(&z1, crt->np_prime, len) ||
+ copy_from_user(&z2, crt->bp_key, len) ||
+ copy_from_user(&z3, crt->u_mult_inv, len))
+ return -EFAULT;
+ copied = 1;
+ /**
+ * We have to restart device lookup -
+ * the device list may have changed by now.
+ */
+ goto restart;
+ }
+ if (z1 != 0ULL || z2 != 0ULL || z3 != 0ULL)
+ /* The device can't handle this request. */
+ continue;
+ }
+ zcrypt_device_get(zdev);
+ get_device(&zdev->ap_dev->device);
+ zdev->request_count++;
+ __zcrypt_decrease_preference(zdev);
+ spin_unlock_bh(&zcrypt_device_lock);
+ if (try_module_get(zdev->ap_dev->drv->driver.owner)) {
+ rc = zdev->ops->rsa_modexpo_crt(zdev, crt);
+ module_put(zdev->ap_dev->drv->driver.owner);
+ }
+ else
+ rc = -EAGAIN;
+ spin_lock_bh(&zcrypt_device_lock);
+ 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;
+}
+
+/**
+ * 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 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;
+}
+
+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);
+ return zcrypt_unlocked_ioctl(filp, cmd, arg);
+}
+#endif
+
+/**
+ * Misc device file operations.
+ */
+static 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 inline 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 inline 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 inline 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 inline 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((unsigned 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;
+}
+
+/**
+ * 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->nlink = 1;
+ 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;
+}
+
+/**
+ * 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
--- /dev/null
+/*
+ * include/asm-s390/zcrypt.h
+ *
+ * zcrypt 2.0.0 (user-visible header)
+ *
+ * Copyright (C) 2001, 2006 IBM Corporation
+ * Author(s): Robert Burroughs
+ * Eric Rossman (edrossma@us.ibm.com)
+ *
+ * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef __ASM_S390_ZCRYPT_H
+#define __ASM_S390_ZCRYPT_H
+
+#define ZCRYPT_VERSION 2
+#define ZCRYPT_RELEASE 1
+#define ZCRYPT_VARIANT 0
+
+#include <linux/ioctl.h>
+#include <linux/compiler.h>
+
+/**
+ * struct ica_rsa_modexpo
+ *
+ * Requirements:
+ * - outputdatalength is at least as large as inputdatalength.
+ * - All key parts are right justified in their fields, padded on
+ * the left with zeroes.
+ * - length(b_key) = inputdatalength
+ * - length(n_modulus) = inputdatalength
+ */
+struct ica_rsa_modexpo {
+ char __user * inputdata;
+ unsigned int inputdatalength;
+ char __user * outputdata;
+ unsigned int outputdatalength;
+ char __user * b_key;
+ char __user * n_modulus;
+};
+
+/**
+ * struct ica_rsa_modexpo_crt
+ *
+ * Requirements:
+ * - inputdatalength is even.
+ * - outputdatalength is at least as large as inputdatalength.
+ * - All key parts are right justified in their fields, padded on
+ * the left with zeroes.
+ * - length(bp_key) = inputdatalength/2 + 8
+ * - length(bq_key) = inputdatalength/2
+ * - length(np_key) = inputdatalength/2 + 8
+ * - length(nq_key) = inputdatalength/2
+ * - length(u_mult_inv) = inputdatalength/2 + 8
+ */
+struct ica_rsa_modexpo_crt {
+ char __user * inputdata;
+ unsigned int inputdatalength;
+ char __user * outputdata;
+ unsigned int outputdatalength;
+ char __user * bp_key;
+ char __user * bq_key;
+ char __user * np_prime;
+ char __user * nq_prime;
+ char __user * u_mult_inv;
+};
+
+#define ZCRYPT_IOCTL_MAGIC 'z'
+
+/**
+ * Interface notes:
+ *
+ * The ioctl()s which are implemented (along with relevant details)
+ * are:
+ *
+ * ICARSAMODEXPO
+ * Perform an RSA operation using a Modulus-Exponent pair
+ * This takes an ica_rsa_modexpo struct as its arg.
+ *
+ * NOTE: please refer to the comments preceding this structure
+ * for the implementation details for the contents of the
+ * block
+ *
+ * ICARSACRT
+ * Perform an RSA operation using a Chinese-Remainder Theorem key
+ * This takes an ica_rsa_modexpo_crt struct as its arg.
+ *
+ * NOTE: please refer to the comments preceding this structure
+ * for the implementation details for the contents of the
+ * block
+ *
+ * Z90STAT_TOTALCOUNT
+ * Return an integer count of all device types together.
+ *
+ * Z90STAT_PCICACOUNT
+ * Return an integer count of all PCICAs.
+ *
+ * Z90STAT_PCICCCOUNT
+ * Return an integer count of all PCICCs.
+ *
+ * Z90STAT_PCIXCCMCL2COUNT
+ * Return an integer count of all MCL2 PCIXCCs.
+ *
+ * Z90STAT_PCIXCCMCL3COUNT
+ * Return an integer count of all MCL3 PCIXCCs.
+ *
+ * Z90STAT_CEX2CCOUNT
+ * Return an integer count of all CEX2Cs.
+ *
+ * Z90STAT_CEX2ACOUNT
+ * Return an integer count of all CEX2As.
+ *
+ * Z90STAT_REQUESTQ_COUNT
+ * Return an integer count of the number of entries waiting to be
+ * sent to a device.
+ *
+ * Z90STAT_PENDINGQ_COUNT
+ * Return an integer count of the number of entries sent to a
+ * device awaiting the reply.
+ *
+ * Z90STAT_TOTALOPEN_COUNT
+ * Return an integer count of the number of open file handles.
+ *
+ * Z90STAT_DOMAIN_INDEX
+ * Return the integer value of the Cryptographic Domain.
+ *
+ * Z90STAT_STATUS_MASK
+ * Return an 64 element array of unsigned chars for the status of
+ * all devices.
+ * 0x01: PCICA
+ * 0x02: PCICC
+ * 0x03: PCIXCC_MCL2
+ * 0x04: PCIXCC_MCL3
+ * 0x05: CEX2C
+ * 0x06: CEX2A
+ * 0x0d: device is disabled via the proc filesystem
+ *
+ * Z90STAT_QDEPTH_MASK
+ * Return an 64 element array of unsigned chars for the queue
+ * depth of all devices.
+ *
+ * Z90STAT_PERDEV_REQCNT
+ * Return an 64 element array of unsigned integers for the number
+ * of successfully completed requests per device since the device
+ * was detected and made available.
+ *
+ * ICAZ90STATUS (deprecated)
+ * Return some device driver status in a ica_z90_status struct
+ * This takes an ica_z90_status struct as its arg.
+ *
+ * NOTE: this ioctl() is deprecated, and has been replaced with
+ * single ioctl()s for each type of status being requested
+ *
+ * Z90STAT_PCIXCCCOUNT (deprecated)
+ * Return an integer count of all PCIXCCs (MCL2 + MCL3).
+ * This is DEPRECATED now that MCL3 PCIXCCs are treated differently from
+ * MCL2 PCIXCCs.
+ *
+ * Z90QUIESCE (not recommended)
+ * Quiesce the driver. This is intended to stop all new
+ * requests from being processed. Its use is NOT recommended,
+ * except in circumstances where there is no other way to stop
+ * callers from accessing the driver. Its original use was to
+ * allow the driver to be "drained" of work in preparation for
+ * a system shutdown.
+ *
+ * NOTE: once issued, this ban on new work cannot be undone
+ * except by unloading and reloading the driver.
+ */
+
+/**
+ * Supported ioctl calls
+ */
+#define ICARSAMODEXPO _IOC(_IOC_READ|_IOC_WRITE, ZCRYPT_IOCTL_MAGIC, 0x05, 0)
+#define ICARSACRT _IOC(_IOC_READ|_IOC_WRITE, ZCRYPT_IOCTL_MAGIC, 0x06, 0)
+
+/* New status calls */
+#define Z90STAT_TOTALCOUNT _IOR(ZCRYPT_IOCTL_MAGIC, 0x40, int)
+#define Z90STAT_PCICACOUNT _IOR(ZCRYPT_IOCTL_MAGIC, 0x41, int)
+#define Z90STAT_PCICCCOUNT _IOR(ZCRYPT_IOCTL_MAGIC, 0x42, int)
+#define Z90STAT_PCIXCCMCL2COUNT _IOR(ZCRYPT_IOCTL_MAGIC, 0x4b, int)
+#define Z90STAT_PCIXCCMCL3COUNT _IOR(ZCRYPT_IOCTL_MAGIC, 0x4c, int)
+#define Z90STAT_CEX2CCOUNT _IOR(ZCRYPT_IOCTL_MAGIC, 0x4d, int)
+#define Z90STAT_CEX2ACOUNT _IOR(ZCRYPT_IOCTL_MAGIC, 0x4e, int)
+#define Z90STAT_REQUESTQ_COUNT _IOR(ZCRYPT_IOCTL_MAGIC, 0x44, int)
+#define Z90STAT_PENDINGQ_COUNT _IOR(ZCRYPT_IOCTL_MAGIC, 0x45, int)
+#define Z90STAT_TOTALOPEN_COUNT _IOR(ZCRYPT_IOCTL_MAGIC, 0x46, int)
+#define Z90STAT_DOMAIN_INDEX _IOR(ZCRYPT_IOCTL_MAGIC, 0x47, int)
+#define Z90STAT_STATUS_MASK _IOR(ZCRYPT_IOCTL_MAGIC, 0x48, char[64])
+#define Z90STAT_QDEPTH_MASK _IOR(ZCRYPT_IOCTL_MAGIC, 0x49, char[64])
+#define Z90STAT_PERDEV_REQCNT _IOR(ZCRYPT_IOCTL_MAGIC, 0x4a, int[64])
+
+#endif /* __ASM_S390_ZCRYPT_H */
projects / linux-2.6-omap-h63xx.git / commitdiff