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1/*
2 * zcrypt 2.1.0
3 *
4 * Copyright IBM Corp. 2001, 2012
5 * Author(s): Robert Burroughs
6 * Eric Rossman (edrossma@us.ibm.com)
7 * Cornelia Huck <cornelia.huck@de.ibm.com>
8 *
9 * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
10 * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
11 * Ralph Wuerthner <rwuerthn@de.ibm.com>
12 * MSGTYPE restruct: Holger Dengler <hd@linux.vnet.ibm.com>
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2, or (at your option)
17 * any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 */
28
29#ifndef _ZCRYPT_API_H_
30#define _ZCRYPT_API_H_
31
32#include <linux/atomic.h>
33#include <asm/debug.h>
34#include <asm/zcrypt.h>
35#include "ap_bus.h"
36
37/* deprecated status calls */
38#define ICAZ90STATUS _IOR(ZCRYPT_IOCTL_MAGIC, 0x10, struct ica_z90_status)
39#define Z90STAT_PCIXCCCOUNT _IOR(ZCRYPT_IOCTL_MAGIC, 0x43, int)
40
41/**
42 * This structure is deprecated and the corresponding ioctl() has been
43 * replaced with individual ioctl()s for each piece of data!
44 */
45struct ica_z90_status {
46 int totalcount;
47 int leedslitecount; // PCICA
48 int leeds2count; // PCICC
49 // int PCIXCCCount; is not in struct for backward compatibility
50 int requestqWaitCount;
51 int pendingqWaitCount;
52 int totalOpenCount;
53 int cryptoDomain;
54 // status: 0=not there, 1=PCICA, 2=PCICC, 3=PCIXCC_MCL2, 4=PCIXCC_MCL3,
55 // 5=CEX2C
56 unsigned char status[64];
57 // qdepth: # work elements waiting for each device
58 unsigned char qdepth[64];
59};
60
61/**
62 * device type for an actual device is either PCICA, PCICC, PCIXCC_MCL2,
63 * PCIXCC_MCL3, CEX2C, or CEX2A
64 *
65 * NOTE: PCIXCC_MCL3 refers to a PCIXCC with May 2004 version of Licensed
66 * Internal Code (LIC) (EC J12220 level 29).
67 * PCIXCC_MCL2 refers to any LIC before this level.
68 */
69#define ZCRYPT_PCICA 1
70#define ZCRYPT_PCICC 2
71#define ZCRYPT_PCIXCC_MCL2 3
72#define ZCRYPT_PCIXCC_MCL3 4
73#define ZCRYPT_CEX2C 5
74#define ZCRYPT_CEX2A 6
75#define ZCRYPT_CEX3C 7
76#define ZCRYPT_CEX3A 8
77#define ZCRYPT_CEX4 10
78#define ZCRYPT_CEX5 11
79
80/**
81 * Large random numbers are pulled in 4096 byte chunks from the crypto cards
82 * and stored in a page. Be careful when increasing this buffer due to size
83 * limitations for AP requests.
84 */
85#define ZCRYPT_RNG_BUFFER_SIZE 4096
86
87struct zcrypt_device;
88
89struct zcrypt_ops {
90 long (*rsa_modexpo)(struct zcrypt_device *, struct ica_rsa_modexpo *);
91 long (*rsa_modexpo_crt)(struct zcrypt_device *,
92 struct ica_rsa_modexpo_crt *);
93 long (*send_cprb)(struct zcrypt_device *, struct ica_xcRB *);
94 long (*send_ep11_cprb)(struct zcrypt_device *, struct ep11_urb *);
95 long (*rng)(struct zcrypt_device *, char *);
96 struct list_head list; /* zcrypt ops list. */
97 struct module *owner;
98 int variant;
99};
100
101struct zcrypt_device {
102 struct list_head list; /* Device list. */
103 spinlock_t lock; /* Per device lock. */
104 struct kref refcount; /* device refcounting */
105 struct ap_device *ap_dev; /* The "real" ap device. */
106 struct zcrypt_ops *ops; /* Crypto operations. */
107 int online; /* User online/offline */
108
109 int user_space_type; /* User space device id. */
110 char *type_string; /* User space device name. */
111 int min_mod_size; /* Min number of bits. */
112 int max_mod_size; /* Max number of bits. */
113 int short_crt; /* Card has crt length restriction. */
114 int speed_rating; /* Speed of the crypto device. */
115
116 int request_count; /* # current requests. */
117
118 struct ap_message reply; /* Per-device reply structure. */
119 int max_exp_bit_length;
120
121 debug_info_t *dbf_area; /* debugging */
122};
123
124/* transport layer rescanning */
125extern atomic_t zcrypt_rescan_req;
126
127struct zcrypt_device *zcrypt_device_alloc(size_t);
128void zcrypt_device_free(struct zcrypt_device *);
129void zcrypt_device_get(struct zcrypt_device *);
130int zcrypt_device_put(struct zcrypt_device *);
131int zcrypt_device_register(struct zcrypt_device *);
132void zcrypt_device_unregister(struct zcrypt_device *);
133void zcrypt_msgtype_register(struct zcrypt_ops *);
134void zcrypt_msgtype_unregister(struct zcrypt_ops *);
135struct zcrypt_ops *zcrypt_msgtype_request(unsigned char *, int);
136void zcrypt_msgtype_release(struct zcrypt_ops *);
137int zcrypt_api_init(void);
138void zcrypt_api_exit(void);
139
140#endif /* _ZCRYPT_API_H_ */