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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
87/*
88 * Identifier for Crypto Request Performance Index
89 */
90enum crypto_ops {
91 MEX_1K,
92 MEX_2K,
93 MEX_4K,
94 CRT_1K,
95 CRT_2K,
96 CRT_4K,
97 HWRNG,
98 SECKEY,
99 NUM_OPS
100};
101
102struct zcrypt_queue;
103
104struct zcrypt_ops {
105 long (*rsa_modexpo)(struct zcrypt_queue *, struct ica_rsa_modexpo *);
106 long (*rsa_modexpo_crt)(struct zcrypt_queue *,
107 struct ica_rsa_modexpo_crt *);
108 long (*send_cprb)(struct zcrypt_queue *, struct ica_xcRB *,
109 struct ap_message *);
110 long (*send_ep11_cprb)(struct zcrypt_queue *, struct ep11_urb *,
111 struct ap_message *);
112 long (*rng)(struct zcrypt_queue *, char *, struct ap_message *);
113 struct list_head list; /* zcrypt ops list. */
114 struct module *owner;
115 int variant;
116 char name[128];
117};
118
119struct zcrypt_card {
120 struct list_head list; /* Device list. */
121 struct list_head zqueues; /* List of zcrypt queues */
122 struct kref refcount; /* device refcounting */
123 struct ap_card *card; /* The "real" ap card device. */
124 int online; /* User online/offline */
125
126 int user_space_type; /* User space device id. */
127 char *type_string; /* User space device name. */
128 int min_mod_size; /* Min number of bits. */
129 int max_mod_size; /* Max number of bits. */
130 int max_exp_bit_length;
131 int speed_rating[NUM_OPS]; /* Speed idx of crypto ops. */
132 atomic_t load; /* Utilization of the crypto device */
133
134 int request_count; /* # current requests. */
135};
136
137struct zcrypt_queue {
138 struct list_head list; /* Device list. */
139 struct kref refcount; /* device refcounting */
140 struct zcrypt_card *zcard;
141 struct zcrypt_ops *ops; /* Crypto operations. */
142 struct ap_queue *queue; /* The "real" ap queue device. */
143 int online; /* User online/offline */
144
145 atomic_t load; /* Utilization of the crypto device */
146
147 int request_count; /* # current requests. */
148
149 struct ap_message reply; /* Per-device reply structure. */
150};
151
152/* transport layer rescanning */
153extern atomic_t zcrypt_rescan_req;
154
155extern spinlock_t zcrypt_list_lock;
156extern int zcrypt_device_count;
157extern struct list_head zcrypt_card_list;
158
159#define for_each_zcrypt_card(_zc) \
160 list_for_each_entry(_zc, &zcrypt_card_list, list)
161
162#define for_each_zcrypt_queue(_zq, _zc) \
163 list_for_each_entry(_zq, &(_zc)->zqueues, list)
164
165struct zcrypt_card *zcrypt_card_alloc(void);
166void zcrypt_card_free(struct zcrypt_card *);
167void zcrypt_card_get(struct zcrypt_card *);
168int zcrypt_card_put(struct zcrypt_card *);
169int zcrypt_card_register(struct zcrypt_card *);
170void zcrypt_card_unregister(struct zcrypt_card *);
171struct zcrypt_card *zcrypt_card_get_best(unsigned int *,
172 unsigned int, unsigned int);
173void zcrypt_card_put_best(struct zcrypt_card *, unsigned int);
174
175struct zcrypt_queue *zcrypt_queue_alloc(size_t);
176void zcrypt_queue_free(struct zcrypt_queue *);
177void zcrypt_queue_get(struct zcrypt_queue *);
178int zcrypt_queue_put(struct zcrypt_queue *);
179int zcrypt_queue_register(struct zcrypt_queue *);
180void zcrypt_queue_unregister(struct zcrypt_queue *);
181void zcrypt_queue_force_online(struct zcrypt_queue *, int);
182struct zcrypt_queue *zcrypt_queue_get_best(unsigned int, unsigned int);
183void zcrypt_queue_put_best(struct zcrypt_queue *, unsigned int);
184
185int zcrypt_rng_device_add(void);
186void zcrypt_rng_device_remove(void);
187
188void zcrypt_msgtype_register(struct zcrypt_ops *);
189void zcrypt_msgtype_unregister(struct zcrypt_ops *);
190struct zcrypt_ops *zcrypt_msgtype(unsigned char *, int);
191int zcrypt_api_init(void);
192void zcrypt_api_exit(void);
193long zcrypt_send_cprb(struct ica_xcRB *xcRB);
194void zcrypt_device_status_mask(struct zcrypt_device_matrix *devstatus);
195
196#endif /* _ZCRYPT_API_H_ */