1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/*
* 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_DEV(DBF_INFO, zc, "card%02xo%dman", 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);
zc->dbf_area = zcrypt_dbf_cards;
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;
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)
{
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);
|
