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1/* SPDX-License-Identifier: GPL-2.0+ */
2/*
3 * Copyright IBM Corp. 2001, 2019
4 * Author(s): Robert Burroughs
5 * Eric Rossman (edrossma@us.ibm.com)
6 * Cornelia Huck <cornelia.huck@de.ibm.com>
7 *
8 * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
9 * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
10 * Ralph Wuerthner <rwuerthn@de.ibm.com>
11 * MSGTYPE restruct: Holger Dengler <hd@linux.vnet.ibm.com>
12 */
13
14#ifndef _ZCRYPT_API_H_
15#define _ZCRYPT_API_H_
16
17#include <linux/atomic.h>
18#include <asm/debug.h>
19#include <asm/zcrypt.h>
20#include "ap_bus.h"
21
22/**
23 * Supported device types
24 */
25#define ZCRYPT_CEX2C 5
26#define ZCRYPT_CEX2A 6
27#define ZCRYPT_CEX3C 7
28#define ZCRYPT_CEX3A 8
29#define ZCRYPT_CEX4 10
30#define ZCRYPT_CEX5 11
31#define ZCRYPT_CEX6 12
32#define ZCRYPT_CEX7 13
33
34/**
35 * Large random numbers are pulled in 4096 byte chunks from the crypto cards
36 * and stored in a page. Be careful when increasing this buffer due to size
37 * limitations for AP requests.
38 */
39#define ZCRYPT_RNG_BUFFER_SIZE 4096
40
41/*
42 * Identifier for Crypto Request Performance Index
43 */
44enum crypto_ops {
45 MEX_1K,
46 MEX_2K,
47 MEX_4K,
48 CRT_1K,
49 CRT_2K,
50 CRT_4K,
51 HWRNG,
52 SECKEY,
53 NUM_OPS
54};
55
56struct zcrypt_queue;
57
58/* struct to hold tracking information for a userspace request/response */
59struct zcrypt_track {
60 int again_counter; /* retry attempts counter */
61 int last_qid; /* last qid used */
62 int last_rc; /* last return code */
63};
64
65/* defines related to message tracking */
66#define TRACK_AGAIN_MAX 10
67#define TRACK_AGAIN_CARD_WEIGHT_PENALTY 1000
68#define TRACK_AGAIN_QUEUE_WEIGHT_PENALTY 10000
69
70struct zcrypt_ops {
71 long (*rsa_modexpo)(struct zcrypt_queue *, struct ica_rsa_modexpo *,
72 struct ap_message *);
73 long (*rsa_modexpo_crt)(struct zcrypt_queue *,
74 struct ica_rsa_modexpo_crt *,
75 struct ap_message *);
76 long (*send_cprb)(bool userspace, struct zcrypt_queue *, struct ica_xcRB *,
77 struct ap_message *);
78 long (*send_ep11_cprb)(bool userspace, struct zcrypt_queue *, struct ep11_urb *,
79 struct ap_message *);
80 long (*rng)(struct zcrypt_queue *, char *, struct ap_message *);
81 struct list_head list; /* zcrypt ops list. */
82 struct module *owner;
83 int variant;
84 char name[128];
85};
86
87struct zcrypt_card {
88 struct list_head list; /* Device list. */
89 struct list_head zqueues; /* List of zcrypt queues */
90 struct kref refcount; /* device refcounting */
91 struct ap_card *card; /* The "real" ap card device. */
92 int online; /* User online/offline */
93
94 int user_space_type; /* User space device id. */
95 char *type_string; /* User space device name. */
96 int min_mod_size; /* Min number of bits. */
97 int max_mod_size; /* Max number of bits. */
98 int max_exp_bit_length;
99 const int *speed_rating; /* Speed idx of crypto ops. */
100 atomic_t load; /* Utilization of the crypto device */
101
102 int request_count; /* # current requests. */
103};
104
105struct zcrypt_queue {
106 struct list_head list; /* Device list. */
107 struct kref refcount; /* device refcounting */
108 struct zcrypt_card *zcard;
109 struct zcrypt_ops *ops; /* Crypto operations. */
110 struct ap_queue *queue; /* The "real" ap queue device. */
111 int online; /* User online/offline */
112
113 atomic_t load; /* Utilization of the crypto device */
114
115 int request_count; /* # current requests. */
116
117 struct ap_message reply; /* Per-device reply structure. */
118};
119
120/* transport layer rescanning */
121extern atomic_t zcrypt_rescan_req;
122
123extern spinlock_t zcrypt_list_lock;
124extern struct list_head zcrypt_card_list;
125
126#define for_each_zcrypt_card(_zc) \
127 list_for_each_entry(_zc, &zcrypt_card_list, list)
128
129#define for_each_zcrypt_queue(_zq, _zc) \
130 list_for_each_entry(_zq, &(_zc)->zqueues, list)
131
132struct zcrypt_card *zcrypt_card_alloc(void);
133void zcrypt_card_free(struct zcrypt_card *);
134void zcrypt_card_get(struct zcrypt_card *);
135int zcrypt_card_put(struct zcrypt_card *);
136int zcrypt_card_register(struct zcrypt_card *);
137void zcrypt_card_unregister(struct zcrypt_card *);
138
139struct zcrypt_queue *zcrypt_queue_alloc(size_t);
140void zcrypt_queue_free(struct zcrypt_queue *);
141void zcrypt_queue_get(struct zcrypt_queue *);
142int zcrypt_queue_put(struct zcrypt_queue *);
143int zcrypt_queue_register(struct zcrypt_queue *);
144void zcrypt_queue_unregister(struct zcrypt_queue *);
145bool zcrypt_queue_force_online(struct zcrypt_queue *zq, int online);
146
147int zcrypt_rng_device_add(void);
148void zcrypt_rng_device_remove(void);
149
150void zcrypt_msgtype_register(struct zcrypt_ops *);
151void zcrypt_msgtype_unregister(struct zcrypt_ops *);
152struct zcrypt_ops *zcrypt_msgtype(unsigned char *, int);
153int zcrypt_api_init(void);
154void zcrypt_api_exit(void);
155long zcrypt_send_cprb(struct ica_xcRB *xcRB);
156long zcrypt_send_ep11_cprb(struct ep11_urb *urb);
157void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus);
158int zcrypt_device_status_ext(int card, int queue,
159 struct zcrypt_device_status_ext *devstatus);
160
161int zcrypt_wait_api_operational(void);
162
163static inline unsigned long z_copy_from_user(bool userspace,
164 void *to,
165 const void __user *from,
166 unsigned long n)
167{
168 if (likely(userspace))
169 return copy_from_user(to, from, n);
170 memcpy(to, (void __force *)from, n);
171 return 0;
172}
173
174static inline unsigned long z_copy_to_user(bool userspace,
175 void __user *to,
176 const void *from,
177 unsigned long n)
178{
179 if (likely(userspace))
180 return copy_to_user(to, from, n);
181 memcpy((void __force *)to, from, n);
182 return 0;
183}
184
185#endif /* _ZCRYPT_API_H_ */
1/* SPDX-License-Identifier: GPL-2.0+ */
2/*
3 * Copyright IBM Corp. 2001, 2019
4 * Author(s): Robert Burroughs
5 * Eric Rossman (edrossma@us.ibm.com)
6 * Cornelia Huck <cornelia.huck@de.ibm.com>
7 *
8 * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
9 * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
10 * Ralph Wuerthner <rwuerthn@de.ibm.com>
11 * MSGTYPE restruct: Holger Dengler <hd@linux.vnet.ibm.com>
12 */
13
14#ifndef _ZCRYPT_API_H_
15#define _ZCRYPT_API_H_
16
17#include <linux/atomic.h>
18#include <asm/debug.h>
19#include <asm/zcrypt.h>
20#include "ap_bus.h"
21
22/**
23 * Supported device types
24 */
25#define ZCRYPT_CEX2C 5
26#define ZCRYPT_CEX2A 6
27#define ZCRYPT_CEX3C 7
28#define ZCRYPT_CEX3A 8
29#define ZCRYPT_CEX4 10
30#define ZCRYPT_CEX5 11
31#define ZCRYPT_CEX6 12
32#define ZCRYPT_CEX7 13
33
34/**
35 * Large random numbers are pulled in 4096 byte chunks from the crypto cards
36 * and stored in a page. Be careful when increasing this buffer due to size
37 * limitations for AP requests.
38 */
39#define ZCRYPT_RNG_BUFFER_SIZE 4096
40
41/*
42 * Identifier for Crypto Request Performance Index
43 */
44enum crypto_ops {
45 MEX_1K,
46 MEX_2K,
47 MEX_4K,
48 CRT_1K,
49 CRT_2K,
50 CRT_4K,
51 HWRNG,
52 SECKEY,
53 NUM_OPS
54};
55
56struct zcrypt_queue;
57
58struct zcrypt_ops {
59 long (*rsa_modexpo)(struct zcrypt_queue *, struct ica_rsa_modexpo *);
60 long (*rsa_modexpo_crt)(struct zcrypt_queue *,
61 struct ica_rsa_modexpo_crt *);
62 long (*send_cprb)(struct zcrypt_queue *, struct ica_xcRB *,
63 struct ap_message *);
64 long (*send_ep11_cprb)(struct zcrypt_queue *, struct ep11_urb *,
65 struct ap_message *);
66 long (*rng)(struct zcrypt_queue *, char *, struct ap_message *);
67 struct list_head list; /* zcrypt ops list. */
68 struct module *owner;
69 int variant;
70 char name[128];
71};
72
73struct zcrypt_card {
74 struct list_head list; /* Device list. */
75 struct list_head zqueues; /* List of zcrypt queues */
76 struct kref refcount; /* device refcounting */
77 struct ap_card *card; /* The "real" ap card device. */
78 int online; /* User online/offline */
79
80 int user_space_type; /* User space device id. */
81 char *type_string; /* User space device name. */
82 int min_mod_size; /* Min number of bits. */
83 int max_mod_size; /* Max number of bits. */
84 int max_exp_bit_length;
85 int speed_rating[NUM_OPS]; /* Speed idx of crypto ops. */
86 atomic_t load; /* Utilization of the crypto device */
87
88 int request_count; /* # current requests. */
89};
90
91struct zcrypt_queue {
92 struct list_head list; /* Device list. */
93 struct kref refcount; /* device refcounting */
94 struct zcrypt_card *zcard;
95 struct zcrypt_ops *ops; /* Crypto operations. */
96 struct ap_queue *queue; /* The "real" ap queue device. */
97 int online; /* User online/offline */
98
99 atomic_t load; /* Utilization of the crypto device */
100
101 int request_count; /* # current requests. */
102
103 struct ap_message reply; /* Per-device reply structure. */
104};
105
106/* transport layer rescanning */
107extern atomic_t zcrypt_rescan_req;
108
109extern spinlock_t zcrypt_list_lock;
110extern int zcrypt_device_count;
111extern struct list_head zcrypt_card_list;
112
113#define for_each_zcrypt_card(_zc) \
114 list_for_each_entry(_zc, &zcrypt_card_list, list)
115
116#define for_each_zcrypt_queue(_zq, _zc) \
117 list_for_each_entry(_zq, &(_zc)->zqueues, list)
118
119struct zcrypt_card *zcrypt_card_alloc(void);
120void zcrypt_card_free(struct zcrypt_card *);
121void zcrypt_card_get(struct zcrypt_card *);
122int zcrypt_card_put(struct zcrypt_card *);
123int zcrypt_card_register(struct zcrypt_card *);
124void zcrypt_card_unregister(struct zcrypt_card *);
125
126struct zcrypt_queue *zcrypt_queue_alloc(size_t);
127void zcrypt_queue_free(struct zcrypt_queue *);
128void zcrypt_queue_get(struct zcrypt_queue *);
129int zcrypt_queue_put(struct zcrypt_queue *);
130int zcrypt_queue_register(struct zcrypt_queue *);
131void zcrypt_queue_unregister(struct zcrypt_queue *);
132void zcrypt_queue_force_online(struct zcrypt_queue *, int);
133
134int zcrypt_rng_device_add(void);
135void zcrypt_rng_device_remove(void);
136
137void zcrypt_msgtype_register(struct zcrypt_ops *);
138void zcrypt_msgtype_unregister(struct zcrypt_ops *);
139struct zcrypt_ops *zcrypt_msgtype(unsigned char *, int);
140int zcrypt_api_init(void);
141void zcrypt_api_exit(void);
142long zcrypt_send_cprb(struct ica_xcRB *xcRB);
143void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus);
144int zcrypt_device_status_ext(int card, int queue,
145 struct zcrypt_device_status_ext *devstatus);
146
147#endif /* _ZCRYPT_API_H_ */