1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3 * Copyright IBM Corp. 2001, 2012
4 * Author(s): Robert Burroughs
5 * Eric Rossman (edrossma@us.ibm.com)
6 *
7 * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
8 * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
9 * MSGTYPE restruct: Holger Dengler <hd@linux.vnet.ibm.com>
10 */
11
12 #ifndef _ZCRYPT_MSGTYPE6_H_
13 #define _ZCRYPT_MSGTYPE6_H_
14
15 #include <asm/zcrypt.h>
16
17 #define MSGTYPE06_NAME "zcrypt_msgtype6"
18 #define MSGTYPE06_VARIANT_DEFAULT 0
19 #define MSGTYPE06_VARIANT_NORNG 1
20 #define MSGTYPE06_VARIANT_EP11 2
21
22 /**
23 * The type 6 message family is associated with CEXxC/CEXxP cards.
24 *
25 * It contains a message header followed by a CPRB, both of which
26 * are described below.
27 *
28 * Note that all reserved fields must be zeroes.
29 */
30 struct type6_hdr {
31 unsigned char reserved1; /* 0x00 */
32 unsigned char type; /* 0x06 */
33 unsigned char reserved2[2]; /* 0x0000 */
34 unsigned char right[4]; /* 0x00000000 */
35 unsigned char reserved3[2]; /* 0x0000 */
36 unsigned char reserved4[2]; /* 0x0000 */
37 unsigned char apfs[4]; /* 0x00000000 */
38 unsigned int offset1; /* 0x00000058 (offset to CPRB) */
39 unsigned int offset2; /* 0x00000000 */
40 unsigned int offset3; /* 0x00000000 */
41 unsigned int offset4; /* 0x00000000 */
42 unsigned char agent_id[16]; /* 0x4341000000000000 */
43 /* 0x0000000000000000 */
44 unsigned char rqid[2]; /* rqid. internal to 603 */
45 unsigned char reserved5[2]; /* 0x0000 */
46 unsigned char function_code[2]; /* for PKD, 0x5044 (ascii 'PD') */
47 unsigned char reserved6[2]; /* 0x0000 */
48 unsigned int ToCardLen1; /* (request CPRB len + 3) & -4 */
49 unsigned int ToCardLen2; /* db len 0x00000000 for PKD */
50 unsigned int ToCardLen3; /* 0x00000000 */
51 unsigned int ToCardLen4; /* 0x00000000 */
52 unsigned int FromCardLen1; /* response buffer length */
53 unsigned int FromCardLen2; /* db len 0x00000000 for PKD */
54 unsigned int FromCardLen3; /* 0x00000000 */
55 unsigned int FromCardLen4; /* 0x00000000 */
56 } __packed;
57
58 /**
59 * The type 86 message family is associated with CEXxC/CEXxP cards.
60 *
61 * It contains a message header followed by a CPRB. The CPRB is
62 * the same as the request CPRB, which is described above.
63 *
64 * If format is 1, an error condition exists and no data beyond
65 * the 8-byte message header is of interest.
66 *
67 * The non-error message is shown below.
68 *
69 * Note that all reserved fields must be zeroes.
70 */
71 struct type86_hdr {
72 unsigned char reserved1; /* 0x00 */
73 unsigned char type; /* 0x86 */
74 unsigned char format; /* 0x01 (error) or 0x02 (ok) */
75 unsigned char reserved2; /* 0x00 */
76 unsigned char reply_code; /* reply code (see above) */
77 unsigned char reserved3[3]; /* 0x000000 */
78 } __packed;
79
80 #define TYPE86_RSP_CODE 0x86
81 #define TYPE87_RSP_CODE 0x87
82 #define TYPE86_FMT2 0x02
83
84 struct type86_fmt2_ext {
85 unsigned char reserved[4]; /* 0x00000000 */
86 unsigned char apfs[4]; /* final status */
87 unsigned int count1; /* length of CPRB + parameters */
88 unsigned int offset1; /* offset to CPRB */
89 unsigned int count2; /* 0x00000000 */
90 unsigned int offset2; /* db offset 0x00000000 for PKD */
91 unsigned int count3; /* 0x00000000 */
92 unsigned int offset3; /* 0x00000000 */
93 unsigned int count4; /* 0x00000000 */
94 unsigned int offset4; /* 0x00000000 */
95 } __packed;
96
97 unsigned int get_cprb_fc(bool userspace, struct ica_xcRB *, struct ap_message *,
98 unsigned int *, unsigned short **);
99 unsigned int get_ep11cprb_fc(bool userspace, struct ep11_urb *, struct ap_message *,
100 unsigned int *);
101 unsigned int get_rng_fc(struct ap_message *, int *, unsigned int *);
102
103 #define LOW 10
104 #define MEDIUM 100
105 #define HIGH 500
106
107 int speed_idx_cca(int);
108 int speed_idx_ep11(int);
109
110 /**
111 * Prepare a type6 CPRB message for random number generation
112 *
113 * @ap_dev: AP device pointer
114 * @ap_msg: pointer to AP message
115 */
rng_type6CPRB_msgX(struct ap_message * ap_msg,unsigned int random_number_length,unsigned int * domain)116 static inline void rng_type6CPRB_msgX(struct ap_message *ap_msg,
117 unsigned int random_number_length,
118 unsigned int *domain)
119 {
120 struct {
121 struct type6_hdr hdr;
122 struct CPRBX cprbx;
123 char function_code[2];
124 short int rule_length;
125 char rule[8];
126 short int verb_length;
127 short int key_length;
128 } __packed * msg = ap_msg->msg;
129 static struct type6_hdr static_type6_hdrX = {
130 .type = 0x06,
131 .offset1 = 0x00000058,
132 .agent_id = {'C', 'A'},
133 .function_code = {'R', 'L'},
134 .ToCardLen1 = sizeof(*msg) - sizeof(msg->hdr),
135 .FromCardLen1 = sizeof(*msg) - sizeof(msg->hdr),
136 };
137 static struct CPRBX local_cprbx = {
138 .cprb_len = 0x00dc,
139 .cprb_ver_id = 0x02,
140 .func_id = {0x54, 0x32},
141 .req_parml = sizeof(*msg) - sizeof(msg->hdr) -
142 sizeof(msg->cprbx),
143 .rpl_msgbl = sizeof(*msg) - sizeof(msg->hdr),
144 };
145
146 msg->hdr = static_type6_hdrX;
147 msg->hdr.FromCardLen2 = random_number_length,
148 msg->cprbx = local_cprbx;
149 msg->cprbx.rpl_datal = random_number_length,
150 memcpy(msg->function_code, msg->hdr.function_code, 0x02);
151 msg->rule_length = 0x0a;
152 memcpy(msg->rule, "RANDOM ", 8);
153 msg->verb_length = 0x02;
154 msg->key_length = 0x02;
155 ap_msg->len = sizeof(*msg);
156 *domain = (unsigned short)msg->cprbx.domain;
157 }
158
159 void zcrypt_msgtype6_init(void);
160 void zcrypt_msgtype6_exit(void);
161
162 #endif /* _ZCRYPT_MSGTYPE6_H_ */
163