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 int prep_cca_ap_msg(bool userspace, struct ica_xcRB *xcrb,
98 struct ap_message *ap_msg,
99 unsigned int *fc, unsigned short **dom);
100 int prep_ep11_ap_msg(bool userspace, struct ep11_urb *xcrb,
101 struct ap_message *ap_msg,
102 unsigned int *fc, unsigned int *dom);
103 int prep_rng_ap_msg(struct ap_message *ap_msg,
104 int *fc, unsigned int *dom);
105
106 #define LOW 10
107 #define MEDIUM 100
108 #define HIGH 500
109
110 int speed_idx_cca(int);
111 int speed_idx_ep11(int);
112
113 /**
114 * Prepare a type6 CPRB message for random number generation
115 *
116 * @ap_dev: AP device pointer
117 * @ap_msg: pointer to AP message
118 */
rng_type6cprb_msgx(struct ap_message * ap_msg,unsigned int random_number_length,unsigned int * domain)119 static inline void rng_type6cprb_msgx(struct ap_message *ap_msg,
120 unsigned int random_number_length,
121 unsigned int *domain)
122 {
123 struct {
124 struct type6_hdr hdr;
125 struct CPRBX cprbx;
126 char function_code[2];
127 short int rule_length;
128 char rule[8];
129 short int verb_length;
130 short int key_length;
131 } __packed * msg = ap_msg->msg;
132 static struct type6_hdr static_type6_hdrX = {
133 .type = 0x06,
134 .offset1 = 0x00000058,
135 .agent_id = {'C', 'A'},
136 .function_code = {'R', 'L'},
137 .tocardlen1 = sizeof(*msg) - sizeof(msg->hdr),
138 .fromcardlen1 = sizeof(*msg) - sizeof(msg->hdr),
139 };
140 static struct CPRBX local_cprbx = {
141 .cprb_len = 0x00dc,
142 .cprb_ver_id = 0x02,
143 .func_id = {0x54, 0x32},
144 .req_parml = sizeof(*msg) - sizeof(msg->hdr) -
145 sizeof(msg->cprbx),
146 .rpl_msgbl = sizeof(*msg) - sizeof(msg->hdr),
147 };
148
149 msg->hdr = static_type6_hdrX;
150 msg->hdr.fromcardlen2 = random_number_length;
151 msg->cprbx = local_cprbx;
152 msg->cprbx.rpl_datal = random_number_length;
153 memcpy(msg->function_code, msg->hdr.function_code, 0x02);
154 msg->rule_length = 0x0a;
155 memcpy(msg->rule, "RANDOM ", 8);
156 msg->verb_length = 0x02;
157 msg->key_length = 0x02;
158 ap_msg->len = sizeof(*msg);
159 *domain = (unsigned short)msg->cprbx.domain;
160 }
161
162 void zcrypt_msgtype6_init(void);
163 void zcrypt_msgtype6_exit(void);
164
165 #endif /* _ZCRYPT_MSGTYPE6_H_ */
166