188 lines
4.6 KiB
C
188 lines
4.6 KiB
C
/*
|
|
* zcrypt 2.1.0
|
|
*
|
|
* Copyright IBM Corp. 2001, 2012
|
|
* 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>
|
|
* MSGTYPE restruct: Holger Dengler <hd@linux.vnet.ibm.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#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/seq_file.h>
|
|
#include <linux/compat.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/atomic.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/hw_random.h>
|
|
#include <linux/debugfs.h>
|
|
#include <asm/debug.h>
|
|
|
|
#include "zcrypt_debug.h"
|
|
#include "zcrypt_api.h"
|
|
|
|
#include "zcrypt_msgtype6.h"
|
|
#include "zcrypt_msgtype50.h"
|
|
|
|
/*
|
|
* Device attributes common for all crypto card devices.
|
|
*/
|
|
|
|
static ssize_t zcrypt_card_type_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct zcrypt_card *zc = to_ap_card(dev)->private;
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%s\n", zc->type_string);
|
|
}
|
|
|
|
static DEVICE_ATTR(type, 0444, zcrypt_card_type_show, NULL);
|
|
|
|
static ssize_t zcrypt_card_online_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct zcrypt_card *zc = to_ap_card(dev)->private;
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%d\n", zc->online);
|
|
}
|
|
|
|
static ssize_t zcrypt_card_online_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct zcrypt_card *zc = to_ap_card(dev)->private;
|
|
struct zcrypt_queue *zq;
|
|
int online, id;
|
|
|
|
if (sscanf(buf, "%d\n", &online) != 1 || online < 0 || online > 1)
|
|
return -EINVAL;
|
|
|
|
zc->online = online;
|
|
id = zc->card->id;
|
|
|
|
ZCRYPT_DBF(DBF_INFO, "card=%02x online=%d\n", id, online);
|
|
|
|
spin_lock(&zcrypt_list_lock);
|
|
list_for_each_entry(zq, &zc->zqueues, list)
|
|
zcrypt_queue_force_online(zq, online);
|
|
spin_unlock(&zcrypt_list_lock);
|
|
return count;
|
|
}
|
|
|
|
static DEVICE_ATTR(online, 0644, zcrypt_card_online_show,
|
|
zcrypt_card_online_store);
|
|
|
|
static struct attribute *zcrypt_card_attrs[] = {
|
|
&dev_attr_type.attr,
|
|
&dev_attr_online.attr,
|
|
NULL,
|
|
};
|
|
|
|
static struct attribute_group zcrypt_card_attr_group = {
|
|
.attrs = zcrypt_card_attrs,
|
|
};
|
|
|
|
struct zcrypt_card *zcrypt_card_alloc(void)
|
|
{
|
|
struct zcrypt_card *zc;
|
|
|
|
zc = kzalloc(sizeof(struct zcrypt_card), GFP_KERNEL);
|
|
if (!zc)
|
|
return NULL;
|
|
INIT_LIST_HEAD(&zc->list);
|
|
INIT_LIST_HEAD(&zc->zqueues);
|
|
kref_init(&zc->refcount);
|
|
return zc;
|
|
}
|
|
EXPORT_SYMBOL(zcrypt_card_alloc);
|
|
|
|
void zcrypt_card_free(struct zcrypt_card *zc)
|
|
{
|
|
kfree(zc);
|
|
}
|
|
EXPORT_SYMBOL(zcrypt_card_free);
|
|
|
|
static void zcrypt_card_release(struct kref *kref)
|
|
{
|
|
struct zcrypt_card *zdev =
|
|
container_of(kref, struct zcrypt_card, refcount);
|
|
zcrypt_card_free(zdev);
|
|
}
|
|
|
|
void zcrypt_card_get(struct zcrypt_card *zc)
|
|
{
|
|
kref_get(&zc->refcount);
|
|
}
|
|
EXPORT_SYMBOL(zcrypt_card_get);
|
|
|
|
int zcrypt_card_put(struct zcrypt_card *zc)
|
|
{
|
|
return kref_put(&zc->refcount, zcrypt_card_release);
|
|
}
|
|
EXPORT_SYMBOL(zcrypt_card_put);
|
|
|
|
/**
|
|
* zcrypt_card_register() - Register a crypto card device.
|
|
* @zc: Pointer to a crypto card device
|
|
*
|
|
* Register a crypto card device. Returns 0 if successful.
|
|
*/
|
|
int zcrypt_card_register(struct zcrypt_card *zc)
|
|
{
|
|
int rc;
|
|
|
|
rc = sysfs_create_group(&zc->card->ap_dev.device.kobj,
|
|
&zcrypt_card_attr_group);
|
|
if (rc)
|
|
return rc;
|
|
|
|
spin_lock(&zcrypt_list_lock);
|
|
list_add_tail(&zc->list, &zcrypt_card_list);
|
|
spin_unlock(&zcrypt_list_lock);
|
|
|
|
zc->online = 1;
|
|
|
|
ZCRYPT_DBF(DBF_INFO, "card=%02x register online=1\n", zc->card->id);
|
|
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL(zcrypt_card_register);
|
|
|
|
/**
|
|
* zcrypt_card_unregister(): Unregister a crypto card device.
|
|
* @zc: Pointer to crypto card device
|
|
*
|
|
* Unregister a crypto card device.
|
|
*/
|
|
void zcrypt_card_unregister(struct zcrypt_card *zc)
|
|
{
|
|
ZCRYPT_DBF(DBF_INFO, "card=%02x unregister\n", zc->card->id);
|
|
|
|
spin_lock(&zcrypt_list_lock);
|
|
list_del_init(&zc->list);
|
|
spin_unlock(&zcrypt_list_lock);
|
|
sysfs_remove_group(&zc->card->ap_dev.device.kobj,
|
|
&zcrypt_card_attr_group);
|
|
}
|
|
EXPORT_SYMBOL(zcrypt_card_unregister);
|