drivers/s390/crypto/zcrypt_msgtype6.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  *  zcrypt 2.1.0
   4  *
   5  *  Copyright IBM Corp. 2001, 2012
   6  *  Author(s): Robert Burroughs
   7  *             Eric Rossman (edrossma@us.ibm.com)
   8  *
   9  *  Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
  10  *  Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
  11  *  MSGTYPE restruct:             Holger Dengler <hd@linux.vnet.ibm.com>
  12  */
  13
  14 #ifndef _ZCRYPT_MSGTYPE6_H_
  15 #define _ZCRYPT_MSGTYPE6_H_
  16
  17 #include <asm/zcrypt.h>
  18
  19 #define MSGTYPE06_NAME                  "zcrypt_msgtype6"
  20 #define MSGTYPE06_VARIANT_DEFAULT       0
  21 #define MSGTYPE06_VARIANT_NORNG         1
  22 #define MSGTYPE06_VARIANT_EP11          2
  23
  24 #define MSGTYPE06_MAX_MSG_SIZE          (12*1024)
  25
  26 /**
  27  * The type 6 message family is associated with PCICC or PCIXCC cards.
  28  *
  29  * It contains a message header followed by a CPRB, both of which
  30  * are described below.
  31  *
  32  * Note that all reserved fields must be zeroes.
  33  */
  34 struct type6_hdr {
  35         unsigned char reserved1;        /* 0x00                         */
  36         unsigned char type;             /* 0x06                         */
  37         unsigned char reserved2[2];     /* 0x0000                       */
  38         unsigned char right[4];         /* 0x00000000                   */
  39         unsigned char reserved3[2];     /* 0x0000                       */
  40         unsigned char reserved4[2];     /* 0x0000                       */
  41         unsigned char apfs[4];          /* 0x00000000                   */
  42         unsigned int  offset1;          /* 0x00000058 (offset to CPRB)  */
  43         unsigned int  offset2;          /* 0x00000000                   */
  44         unsigned int  offset3;          /* 0x00000000                   */
  45         unsigned int  offset4;          /* 0x00000000                   */
  46         unsigned char agent_id[16];     /* PCICC:                       */
  47                                         /*    0x0100                    */
  48                                         /*    0x4343412d4150504c202020  */
  49                                         /*    0x010101                  */
  50                                         /* PCIXCC:                      */
  51                                         /*    0x4341000000000000        */
  52                                         /*    0x0000000000000000        */
  53         unsigned char rqid[2];          /* rqid.  internal to 603       */
  54         unsigned char reserved5[2];     /* 0x0000                       */
  55         unsigned char function_code[2]; /* for PKD, 0x5044 (ascii 'PD') */
  56         unsigned char reserved6[2];     /* 0x0000                       */
  57         unsigned int  ToCardLen1;       /* (request CPRB len + 3) & -4  */
  58         unsigned int  ToCardLen2;       /* db len 0x00000000 for PKD    */
  59         unsigned int  ToCardLen3;       /* 0x00000000                   */
  60         unsigned int  ToCardLen4;       /* 0x00000000                   */
  61         unsigned int  FromCardLen1;     /* response buffer length       */
  62         unsigned int  FromCardLen2;     /* db len 0x00000000 for PKD    */
  63         unsigned int  FromCardLen3;     /* 0x00000000                   */
  64         unsigned int  FromCardLen4;     /* 0x00000000                   */
  65 } __packed;
  66
  67 /**
  68  * The type 86 message family is associated with PCICC and PCIXCC cards.
  69  *
  70  * It contains a message header followed by a CPRB.  The CPRB is
  71  * the same as the request CPRB, which is described above.
  72  *
  73  * If format is 1, an error condition exists and no data beyond
  74  * the 8-byte message header is of interest.
  75  *
  76  * The non-error message is shown below.
  77  *
  78  * Note that all reserved fields must be zeroes.
  79  */
  80 struct type86_hdr {
  81         unsigned char reserved1;        /* 0x00                         */
  82         unsigned char type;             /* 0x86                         */
  83         unsigned char format;           /* 0x01 (error) or 0x02 (ok)    */
  84         unsigned char reserved2;        /* 0x00                         */
  85         unsigned char reply_code;       /* reply code (see above)       */
  86         unsigned char reserved3[3];     /* 0x000000                     */
  87 } __packed;
  88
  89 #define TYPE86_RSP_CODE 0x86
  90 #define TYPE87_RSP_CODE 0x87
  91 #define TYPE86_FMT2     0x02
  92
  93 struct type86_fmt2_ext {
  94         unsigned char     reserved[4];  /* 0x00000000                   */
  95         unsigned char     apfs[4];      /* final status                 */
  96         unsigned int      count1;       /* length of CPRB + parameters  */
  97         unsigned int      offset1;      /* offset to CPRB               */
  98         unsigned int      count2;       /* 0x00000000                   */
  99         unsigned int      offset2;      /* db offset 0x00000000 for PKD */
 100         unsigned int      count3;       /* 0x00000000                   */
 101         unsigned int      offset3;      /* 0x00000000                   */
 102         unsigned int      count4;       /* 0x00000000                   */
 103         unsigned int      offset4;      /* 0x00000000                   */
 104 } __packed;
 105
 106 unsigned int get_cprb_fc(struct ica_xcRB *, struct ap_message *,
 107                          unsigned int *, unsigned short **);
 108 unsigned int get_ep11cprb_fc(struct ep11_urb *, struct ap_message *,
 109                              unsigned int *);
 110 unsigned int get_rng_fc(struct ap_message *, int *, unsigned int *);
 111
 112 #define LOW     10
 113 #define MEDIUM  100
 114 #define HIGH    500
 115
 116 int speed_idx_cca(int);
 117 int speed_idx_ep11(int);
 118
 119 /**
 120  * Prepare a type6 CPRB message for random number generation
 121  *
 122  * @ap_dev: AP device pointer
 123  * @ap_msg: pointer to AP message
 124  */
 125 static inline void rng_type6CPRB_msgX(struct ap_message *ap_msg,
 126                                       unsigned int random_number_length,
 127                                       unsigned int *domain)
 128 {
 129         struct {
 130                 struct type6_hdr hdr;
 131                 struct CPRBX cprbx;
 132                 char function_code[2];
 133                 short int rule_length;
 134                 char rule[8];
 135                 short int verb_length;
 136                 short int key_length;
 137         } __packed * msg = ap_msg->message;
 138         static struct type6_hdr static_type6_hdrX = {
 139                 .type           = 0x06,
 140                 .offset1        = 0x00000058,
 141                 .agent_id       = {'C', 'A'},
 142                 .function_code  = {'R', 'L'},
 143                 .ToCardLen1     = sizeof(*msg) - sizeof(msg->hdr),
 144                 .FromCardLen1   = sizeof(*msg) - sizeof(msg->hdr),
 145         };
 146         static struct CPRBX local_cprbx = {
 147                 .cprb_len       = 0x00dc,
 148                 .cprb_ver_id    = 0x02,
 149                 .func_id        = {0x54, 0x32},
 150                 .req_parml      = sizeof(*msg) - sizeof(msg->hdr) -
 151                                   sizeof(msg->cprbx),
 152                 .rpl_msgbl      = sizeof(*msg) - sizeof(msg->hdr),
 153         };
 154
 155         msg->hdr = static_type6_hdrX;
 156         msg->hdr.FromCardLen2 = random_number_length,
 157         msg->cprbx = local_cprbx;
 158         msg->cprbx.rpl_datal = random_number_length,
 159         memcpy(msg->function_code, msg->hdr.function_code, 0x02);
 160         msg->rule_length = 0x0a;
 161         memcpy(msg->rule, "RANDOM  ", 8);
 162         msg->verb_length = 0x02;
 163         msg->key_length = 0x02;
 164         ap_msg->length = sizeof(*msg);
 165         *domain = (unsigned short)msg->cprbx.domain;
 166 }
 167
 168 void zcrypt_msgtype6_init(void);
 169 void zcrypt_msgtype6_exit(void);
 170
 171 #endif /* _ZCRYPT_MSGTYPE6_H_ */