1 /*
2 * linux/drivers/s390/crypto/zcrypt_api.h
3 *
4 * zcrypt 2.1.0
5 *
6 * Copyright (C) 2001, 2006 IBM Corporation
7 * Author(s): Robert Burroughs
8 * Eric Rossman (edrossma@us.ibm.com)
9 * Cornelia Huck <cornelia.huck@de.ibm.com>
10 *
11 * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
12 * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
13 * Ralph Wuerthner <rwuerthn@de.ibm.com>
14 *
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2, or (at your option)
18 * any later version.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 */
29
30 #ifndef _ZCRYPT_API_H_
31 #define _ZCRYPT_API_H_
32
33 #include "ap_bus.h"
34 #include <asm/zcrypt.h>
35
36 /* deprecated status calls */
37 #define ICAZ90STATUS _IOR(ZCRYPT_IOCTL_MAGIC, 0x10, struct ica_z90_status)
38 #define Z90STAT_PCIXCCCOUNT _IOR(ZCRYPT_IOCTL_MAGIC, 0x43, int)
39
40 /**
41 * This structure is deprecated and the corresponding ioctl() has been
42 * replaced with individual ioctl()s for each piece of data!
43 */
44 struct ica_z90_status {
45 int totalcount;
46 int leedslitecount; // PCICA
47 int leeds2count; // PCICC
48 // int PCIXCCCount; is not in struct for backward compatibility
49 int requestqWaitCount;
50 int pendingqWaitCount;
51 int totalOpenCount;
52 int cryptoDomain;
53 // status: 0=not there, 1=PCICA, 2=PCICC, 3=PCIXCC_MCL2, 4=PCIXCC_MCL3,
54 // 5=CEX2C
55 unsigned char status[64];
56 // qdepth: # work elements waiting for each device
57 unsigned char qdepth[64];
58 };
59
60 /**
61 * device type for an actual device is either PCICA, PCICC, PCIXCC_MCL2,
62 * PCIXCC_MCL3, CEX2C, or CEX2A
63 *
64 * NOTE: PCIXCC_MCL3 refers to a PCIXCC with May 2004 version of Licensed
65 * Internal Code (LIC) (EC J12220 level 29).
66 * PCIXCC_MCL2 refers to any LIC before this level.
67 */
68 #define ZCRYPT_PCICA 1
69 #define ZCRYPT_PCICC 2
70 #define ZCRYPT_PCIXCC_MCL2 3
71 #define ZCRYPT_PCIXCC_MCL3 4
72 #define ZCRYPT_CEX2C 5
73 #define ZCRYPT_CEX2A 6
74
75 /**
76 * Large random numbers are pulled in 4096 byte chunks from the crypto cards
77 * and stored in a page. Be carefull when increasing this buffer due to size
78 * limitations for AP requests.
79 */
80 #define ZCRYPT_RNG_BUFFER_SIZE 4096
81
82 struct zcrypt_device;
83
84 struct zcrypt_ops {
85 long (*rsa_modexpo)(struct zcrypt_device *, struct ica_rsa_modexpo *);
86 long (*rsa_modexpo_crt)(struct zcrypt_device *,
87 struct ica_rsa_modexpo_crt *);
88 long (*send_cprb)(struct zcrypt_device *, struct ica_xcRB *);
89 long (*rng)(struct zcrypt_device *, char *);
90 };
91
92 struct zcrypt_device {
93 struct list_head list; /* Device list. */
94 spinlock_t lock; /* Per device lock. */
95 struct kref refcount; /* device refcounting */
96 struct ap_device *ap_dev; /* The "real" ap device. */
97 struct zcrypt_ops *ops; /* Crypto operations. */
98 int online; /* User online/offline */
99
100 int user_space_type; /* User space device id. */
101 char *type_string; /* User space device name. */
102 int min_mod_size; /* Min number of bits. */
103 int max_mod_size; /* Max number of bits. */
104 int short_crt; /* Card has crt length restriction. */
105 int speed_rating; /* Speed of the crypto device. */
106
107 int request_count; /* # current requests. */
108
109 struct ap_message reply; /* Per-device reply structure. */
110 };
111
112 struct zcrypt_device *zcrypt_device_alloc(size_t);
113 void zcrypt_device_free(struct zcrypt_device *);
114 void zcrypt_device_get(struct zcrypt_device *);
115 int zcrypt_device_put(struct zcrypt_device *);
116 int zcrypt_device_register(struct zcrypt_device *);
117 void zcrypt_device_unregister(struct zcrypt_device *);
118 int zcrypt_api_init(void);
119 void zcrypt_api_exit(void);
120
121 #endif /* _ZCRYPT_API_H_ */
122
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