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 #define MSGTYPE06_MAX_MSG_SIZE          (12*1024)
  23
  24 /**
  25  * The type 6 message family is associated with CEXxC/CEXxP cards.
  26  *
  27  * It contains a message header followed by a CPRB, both of which
  28  * are described below.
  29  *
  30  * Note that all reserved fields must be zeroes.
  31  */
  32 struct type6_hdr {
  33         unsigned char reserved1;        /* 0x00                         */
  34         unsigned char type;             /* 0x06                         */
  35         unsigned char reserved2[2];     /* 0x0000                       */
  36         unsigned char right[4];         /* 0x00000000                   */
  37         unsigned char reserved3[2];     /* 0x0000                       */
  38         unsigned char reserved4[2];     /* 0x0000                       */
  39         unsigned char apfs[4];          /* 0x00000000                   */
  40         unsigned int  offset1;          /* 0x00000058 (offset to CPRB)  */
  41         unsigned int  offset2;          /* 0x00000000                   */
  42         unsigned int  offset3;          /* 0x00000000                   */
  43         unsigned int  offset4;          /* 0x00000000                   */
  44         unsigned char agent_id[16];     /* 0x4341000000000000           */
  45                                         /* 0x0000000000000000           */
  46         unsigned char rqid[2];          /* rqid.  internal to 603       */
  47         unsigned char reserved5[2];     /* 0x0000                       */
  48         unsigned char function_code[2]; /* for PKD, 0x5044 (ascii 'PD') */
  49         unsigned char reserved6[2];     /* 0x0000                       */
  50         unsigned int  ToCardLen1;       /* (request CPRB len + 3) & -4  */
  51         unsigned int  ToCardLen2;       /* db len 0x00000000 for PKD    */
  52         unsigned int  ToCardLen3;       /* 0x00000000                   */
  53         unsigned int  ToCardLen4;       /* 0x00000000                   */
  54         unsigned int  FromCardLen1;     /* response buffer length       */
  55         unsigned int  FromCardLen2;     /* db len 0x00000000 for PKD    */
  56         unsigned int  FromCardLen3;     /* 0x00000000                   */
  57         unsigned int  FromCardLen4;     /* 0x00000000                   */
  58 } __packed;
  59
  60 /**
  61  * The type 86 message family is associated with CEXxC/CEXxP cards.
  62  *
  63  * It contains a message header followed by a CPRB.  The CPRB is
  64  * the same as the request CPRB, which is described above.
  65  *
  66  * If format is 1, an error condition exists and no data beyond
  67  * the 8-byte message header is of interest.
  68  *
  69  * The non-error message is shown below.
  70  *
  71  * Note that all reserved fields must be zeroes.
  72  */
  73 struct type86_hdr {
  74         unsigned char reserved1;        /* 0x00                         */
  75         unsigned char type;             /* 0x86                         */
  76         unsigned char format;           /* 0x01 (error) or 0x02 (ok)    */
  77         unsigned char reserved2;        /* 0x00                         */
  78         unsigned char reply_code;       /* reply code (see above)       */
  79         unsigned char reserved3[3];     /* 0x000000                     */
  80 } __packed;
  81
  82 #define TYPE86_RSP_CODE 0x86
  83 #define TYPE87_RSP_CODE 0x87
  84 #define TYPE86_FMT2     0x02
  85
  86 struct type86_fmt2_ext {
  87         unsigned char     reserved[4];  /* 0x00000000                   */
  88         unsigned char     apfs[4];      /* final status                 */
  89         unsigned int      count1;       /* length of CPRB + parameters  */
  90         unsigned int      offset1;      /* offset to CPRB               */
  91         unsigned int      count2;       /* 0x00000000                   */
  92         unsigned int      offset2;      /* db offset 0x00000000 for PKD */
  93         unsigned int      count3;       /* 0x00000000                   */
  94         unsigned int      offset3;      /* 0x00000000                   */
  95         unsigned int      count4;       /* 0x00000000                   */
  96         unsigned int      offset4;      /* 0x00000000                   */
  97 } __packed;
  98
  99 unsigned int get_cprb_fc(struct ica_xcRB *, struct ap_message *,
 100                          unsigned int *, unsigned short **);
 101 unsigned int get_ep11cprb_fc(struct ep11_urb *, struct ap_message *,
 102                              unsigned int *);
 103 unsigned int get_rng_fc(struct ap_message *, int *, unsigned int *);
 104
 105 #define LOW     10
 106 #define MEDIUM  100
 107 #define HIGH    500
 108
 109 int speed_idx_cca(int);
 110 int speed_idx_ep11(int);
 111
 112 /**
 113  * Prepare a type6 CPRB message for random number generation
 114  *
 115  * @ap_dev: AP device pointer
 116  * @ap_msg: pointer to AP message
 117  */
 118 static inline void rng_type6CPRB_msgX(struct ap_message *ap_msg,
 119                                       unsigned int random_number_length,
 120                                       unsigned int *domain)
 121 {
 122         struct {
 123                 struct type6_hdr hdr;
 124                 struct CPRBX cprbx;
 125                 char function_code[2];
 126                 short int rule_length;
 127                 char rule[8];
 128                 short int verb_length;
 129                 short int key_length;
 130         } __packed * msg = ap_msg->message;
 131         static struct type6_hdr static_type6_hdrX = {
 132                 .type           = 0x06,
 133                 .offset1        = 0x00000058,
 134                 .agent_id       = {'C', 'A'},
 135                 .function_code  = {'R', 'L'},
 136                 .ToCardLen1     = sizeof(*msg) - sizeof(msg->hdr),
 137                 .FromCardLen1   = sizeof(*msg) - sizeof(msg->hdr),
 138         };
 139         static struct CPRBX local_cprbx = {
 140                 .cprb_len       = 0x00dc,
 141                 .cprb_ver_id    = 0x02,
 142                 .func_id        = {0x54, 0x32},
 143                 .req_parml      = sizeof(*msg) - sizeof(msg->hdr) -
 144                                   sizeof(msg->cprbx),
 145                 .rpl_msgbl      = sizeof(*msg) - sizeof(msg->hdr),
 146         };
 147
 148         msg->hdr = static_type6_hdrX;
 149         msg->hdr.FromCardLen2 = random_number_length,
 150         msg->cprbx = local_cprbx;
 151         msg->cprbx.rpl_datal = random_number_length,
 152         memcpy(msg->function_code, msg->hdr.function_code, 0x02);
 153         msg->rule_length = 0x0a;
 154         memcpy(msg->rule, "RANDOM  ", 8);
 155         msg->verb_length = 0x02;
 156         msg->key_length = 0x02;
 157         ap_msg->length = sizeof(*msg);
 158         *domain = (unsigned short)msg->cprbx.domain;
 159 }
 160
 161 void zcrypt_msgtype6_init(void);
 162 void zcrypt_msgtype6_exit(void);
 163
 164 #endif /* _ZCRYPT_MSGTYPE6_H_ */