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
182
183
184
185
186
187
188
189
190
191
192
193
194
|
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright IBM Corp. 2001, 2019
* 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>
*/
#ifndef _ZCRYPT_API_H_
#define _ZCRYPT_API_H_
#include <linux/atomic.h>
#include <asm/debug.h>
#include <asm/zcrypt.h>
#include "ap_bus.h"
/**
* Supported device types
*/
#define ZCRYPT_CEX2C 5
#define ZCRYPT_CEX2A 6
#define ZCRYPT_CEX3C 7
#define ZCRYPT_CEX3A 8
#define ZCRYPT_CEX4 10
#define ZCRYPT_CEX5 11
#define ZCRYPT_CEX6 12
#define ZCRYPT_CEX7 13
/**
* Large random numbers are pulled in 4096 byte chunks from the crypto cards
* and stored in a page. Be careful when increasing this buffer due to size
* limitations for AP requests.
*/
#define ZCRYPT_RNG_BUFFER_SIZE 4096
/**
* The zcrypt_wait_api_operational() function waits this
* amount in milliseconds for ap_wait_aqpn_bindings_complete().
* Also on a cprb send failure with ENODEV the send functions
* trigger an ap bus rescan and wait this time in milliseconds
* for ap_wait_aqpn_bindings_complete() before resending.
*/
#define ZCRYPT_WAIT_BINDINGS_COMPLETE_MS 30000
/*
* Identifier for Crypto Request Performance Index
*/
enum crypto_ops {
MEX_1K,
MEX_2K,
MEX_4K,
CRT_1K,
CRT_2K,
CRT_4K,
HWRNG,
SECKEY,
NUM_OPS
};
struct zcrypt_queue;
/* struct to hold tracking information for a userspace request/response */
struct zcrypt_track {
int again_counter; /* retry attempts counter */
int last_qid; /* last qid used */
int last_rc; /* last return code */
};
/* defines related to message tracking */
#define TRACK_AGAIN_MAX 10
#define TRACK_AGAIN_CARD_WEIGHT_PENALTY 1000
#define TRACK_AGAIN_QUEUE_WEIGHT_PENALTY 10000
struct zcrypt_ops {
long (*rsa_modexpo)(struct zcrypt_queue *, struct ica_rsa_modexpo *,
struct ap_message *);
long (*rsa_modexpo_crt)(struct zcrypt_queue *,
struct ica_rsa_modexpo_crt *,
struct ap_message *);
long (*send_cprb)(bool userspace, struct zcrypt_queue *, struct ica_xcRB *,
struct ap_message *);
long (*send_ep11_cprb)(bool userspace, struct zcrypt_queue *, struct ep11_urb *,
struct ap_message *);
long (*rng)(struct zcrypt_queue *, char *, struct ap_message *);
struct list_head list; /* zcrypt ops list. */
struct module *owner;
int variant;
char name[128];
};
struct zcrypt_card {
struct list_head list; /* Device list. */
struct list_head zqueues; /* List of zcrypt queues */
struct kref refcount; /* device refcounting */
struct ap_card *card; /* The "real" ap card device. */
int online; /* User online/offline */
int user_space_type; /* User space device id. */
char *type_string; /* User space device name. */
int min_mod_size; /* Min number of bits. */
int max_mod_size; /* Max number of bits. */
int max_exp_bit_length;
const int *speed_rating; /* Speed idx of crypto ops. */
atomic_t load; /* Utilization of the crypto device */
int request_count; /* # current requests. */
};
struct zcrypt_queue {
struct list_head list; /* Device list. */
struct kref refcount; /* device refcounting */
struct zcrypt_card *zcard;
struct zcrypt_ops *ops; /* Crypto operations. */
struct ap_queue *queue; /* The "real" ap queue device. */
int online; /* User online/offline */
atomic_t load; /* Utilization of the crypto device */
int request_count; /* # current requests. */
struct ap_message reply; /* Per-device reply structure. */
};
/* transport layer rescanning */
extern atomic_t zcrypt_rescan_req;
extern spinlock_t zcrypt_list_lock;
extern struct list_head zcrypt_card_list;
#define for_each_zcrypt_card(_zc) \
list_for_each_entry(_zc, &zcrypt_card_list, list)
#define for_each_zcrypt_queue(_zq, _zc) \
list_for_each_entry(_zq, &(_zc)->zqueues, list)
struct zcrypt_card *zcrypt_card_alloc(void);
void zcrypt_card_free(struct zcrypt_card *);
void zcrypt_card_get(struct zcrypt_card *);
int zcrypt_card_put(struct zcrypt_card *);
int zcrypt_card_register(struct zcrypt_card *);
void zcrypt_card_unregister(struct zcrypt_card *);
struct zcrypt_queue *zcrypt_queue_alloc(size_t);
void zcrypt_queue_free(struct zcrypt_queue *);
void zcrypt_queue_get(struct zcrypt_queue *);
int zcrypt_queue_put(struct zcrypt_queue *);
int zcrypt_queue_register(struct zcrypt_queue *);
void zcrypt_queue_unregister(struct zcrypt_queue *);
bool zcrypt_queue_force_online(struct zcrypt_queue *zq, int online);
int zcrypt_rng_device_add(void);
void zcrypt_rng_device_remove(void);
void zcrypt_msgtype_register(struct zcrypt_ops *);
void zcrypt_msgtype_unregister(struct zcrypt_ops *);
struct zcrypt_ops *zcrypt_msgtype(unsigned char *, int);
int zcrypt_api_init(void);
void zcrypt_api_exit(void);
long zcrypt_send_cprb(struct ica_xcRB *xcRB);
long zcrypt_send_ep11_cprb(struct ep11_urb *urb);
void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus);
int zcrypt_device_status_ext(int card, int queue,
struct zcrypt_device_status_ext *devstatus);
int zcrypt_wait_api_operational(void);
static inline unsigned long z_copy_from_user(bool userspace,
void *to,
const void __user *from,
unsigned long n)
{
if (likely(userspace))
return copy_from_user(to, from, n);
memcpy(to, (void __force *)from, n);
return 0;
}
static inline unsigned long z_copy_to_user(bool userspace,
void __user *to,
const void *from,
unsigned long n)
{
if (likely(userspace))
return copy_to_user(to, from, n);
memcpy((void __force *)to, from, n);
return 0;
}
#endif /* _ZCRYPT_API_H_ */
|
