drivers/s390/crypto/zcrypt_msgtype6.h

   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  */
 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_ */