Commit | Line | Data |
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ac2b96f3 | 1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
2dbc2418 | 2 | /* |
cf2957f3 | 3 | * Copyright IBM Corp. 2001, 2019 |
2dbc2418 MS |
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> | |
5e55a488 | 11 | * MSGTYPE restruct: Holger Dengler <hd@linux.vnet.ibm.com> |
2dbc2418 MS |
12 | */ |
13 | ||
14 | #ifndef _ZCRYPT_API_H_ | |
15 | #define _ZCRYPT_API_H_ | |
16 | ||
dabecb29 HD |
17 | #include <linux/atomic.h> |
18 | #include <asm/debug.h> | |
2dbc2418 | 19 | #include <asm/zcrypt.h> |
dabecb29 | 20 | #include "ap_bus.h" |
2dbc2418 | 21 | |
2dbc2418 | 22 | /** |
ee410de8 | 23 | * Supported device types |
2dbc2418 | 24 | */ |
2dbc2418 MS |
25 | #define ZCRYPT_CEX2C 5 |
26 | #define ZCRYPT_CEX2A 6 | |
8e89b6be FB |
27 | #define ZCRYPT_CEX3C 7 |
28 | #define ZCRYPT_CEX3A 8 | |
91f3e3ea | 29 | #define ZCRYPT_CEX4 10 |
bdea1f1b | 30 | #define ZCRYPT_CEX5 11 |
21214b04 | 31 | #define ZCRYPT_CEX6 12 |
cf2957f3 | 32 | #define ZCRYPT_CEX7 13 |
2dbc2418 | 33 | |
2f7c8bd6 RW |
34 | /** |
35 | * Large random numbers are pulled in 4096 byte chunks from the crypto cards | |
25985edc | 36 | * and stored in a page. Be careful when increasing this buffer due to size |
2f7c8bd6 RW |
37 | * limitations for AP requests. |
38 | */ | |
39 | #define ZCRYPT_RNG_BUFFER_SIZE 4096 | |
40 | ||
34a15167 IT |
41 | /* |
42 | * Identifier for Crypto Request Performance Index | |
43 | */ | |
44 | enum crypto_ops { | |
e28d2af4 | 45 | MEX_1K, |
34a15167 IT |
46 | MEX_2K, |
47 | MEX_4K, | |
48 | CRT_1K, | |
49 | CRT_2K, | |
50 | CRT_4K, | |
51 | HWRNG, | |
52 | SECKEY, | |
53 | NUM_OPS | |
54 | }; | |
55 | ||
e28d2af4 | 56 | struct zcrypt_queue; |
2dbc2418 MS |
57 | |
58 | struct zcrypt_ops { | |
e28d2af4 IT |
59 | long (*rsa_modexpo)(struct zcrypt_queue *, struct ica_rsa_modexpo *); |
60 | long (*rsa_modexpo_crt)(struct zcrypt_queue *, | |
2dbc2418 | 61 | struct ica_rsa_modexpo_crt *); |
52f72feb | 62 | long (*send_cprb)(bool userspace, struct zcrypt_queue *, struct ica_xcRB *, |
34a15167 | 63 | struct ap_message *); |
52f72feb | 64 | long (*send_ep11_cprb)(bool userspace, struct zcrypt_queue *, struct ep11_urb *, |
34a15167 | 65 | struct ap_message *); |
e28d2af4 | 66 | long (*rng)(struct zcrypt_queue *, char *, struct ap_message *); |
5e55a488 HD |
67 | struct list_head list; /* zcrypt ops list. */ |
68 | struct module *owner; | |
69 | int variant; | |
121a868d | 70 | char name[128]; |
2dbc2418 MS |
71 | }; |
72 | ||
e28d2af4 | 73 | struct zcrypt_card { |
2dbc2418 | 74 | struct list_head list; /* Device list. */ |
e28d2af4 | 75 | struct list_head zqueues; /* List of zcrypt queues */ |
2dbc2418 | 76 | struct kref refcount; /* device refcounting */ |
e28d2af4 | 77 | struct ap_card *card; /* The "real" ap card device. */ |
2dbc2418 MS |
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. */ | |
e28d2af4 | 84 | int max_exp_bit_length; |
34a15167 | 85 | int speed_rating[NUM_OPS]; /* Speed idx of crypto ops. */ |
e28d2af4 IT |
86 | atomic_t load; /* Utilization of the crypto device */ |
87 | ||
88 | int request_count; /* # current requests. */ | |
e28d2af4 IT |
89 | }; |
90 | ||
91 | struct 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 */ | |
2dbc2418 MS |
100 | |
101 | int request_count; /* # current requests. */ | |
102 | ||
103 | struct ap_message reply; /* Per-device reply structure. */ | |
104 | }; | |
105 | ||
dabecb29 HD |
106 | /* transport layer rescanning */ |
107 | extern atomic_t zcrypt_rescan_req; | |
108 | ||
e28d2af4 IT |
109 | extern spinlock_t zcrypt_list_lock; |
110 | extern int zcrypt_device_count; | |
111 | extern struct list_head zcrypt_card_list; | |
112 | ||
e28d2af4 IT |
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 | ||
119 | struct zcrypt_card *zcrypt_card_alloc(void); | |
120 | void zcrypt_card_free(struct zcrypt_card *); | |
121 | void zcrypt_card_get(struct zcrypt_card *); | |
122 | int zcrypt_card_put(struct zcrypt_card *); | |
123 | int zcrypt_card_register(struct zcrypt_card *); | |
124 | void zcrypt_card_unregister(struct zcrypt_card *); | |
e28d2af4 IT |
125 | |
126 | struct zcrypt_queue *zcrypt_queue_alloc(size_t); | |
127 | void zcrypt_queue_free(struct zcrypt_queue *); | |
128 | void zcrypt_queue_get(struct zcrypt_queue *); | |
129 | int zcrypt_queue_put(struct zcrypt_queue *); | |
130 | int zcrypt_queue_register(struct zcrypt_queue *); | |
131 | void zcrypt_queue_unregister(struct zcrypt_queue *); | |
132 | void zcrypt_queue_force_online(struct zcrypt_queue *, int); | |
e28d2af4 IT |
133 | |
134 | int zcrypt_rng_device_add(void); | |
135 | void zcrypt_rng_device_remove(void); | |
136 | ||
5e55a488 HD |
137 | void zcrypt_msgtype_register(struct zcrypt_ops *); |
138 | void zcrypt_msgtype_unregister(struct zcrypt_ops *); | |
236fb2ab | 139 | struct zcrypt_ops *zcrypt_msgtype(unsigned char *, int); |
2dbc2418 MS |
140 | int zcrypt_api_init(void); |
141 | void zcrypt_api_exit(void); | |
a1d001e2 | 142 | long zcrypt_send_cprb(struct ica_xcRB *xcRB); |
a7367997 | 143 | long zcrypt_send_ep11_cprb(struct ep11_urb *urb); |
af4a7227 | 144 | void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus); |
4da57a2f HF |
145 | int zcrypt_device_status_ext(int card, int queue, |
146 | struct zcrypt_device_status_ext *devstatus); | |
2dbc2418 | 147 | |
52f72feb HF |
148 | static inline unsigned long z_copy_from_user(bool userspace, |
149 | void *to, | |
150 | const void __user *from, | |
151 | unsigned long n) | |
152 | { | |
153 | if (likely(userspace)) | |
154 | return copy_from_user(to, from, n); | |
155 | memcpy(to, (void __force *) from, n); | |
156 | return 0; | |
157 | } | |
158 | ||
159 | static inline unsigned long z_copy_to_user(bool userspace, | |
160 | void __user *to, | |
161 | const void *from, | |
162 | unsigned long n) | |
163 | { | |
164 | if (likely(userspace)) | |
165 | return copy_to_user(to, from, n); | |
166 | memcpy((void __force *) to, from, n); | |
167 | return 0; | |
168 | } | |
169 | ||
2dbc2418 | 170 | #endif /* _ZCRYPT_API_H_ */ |