LXR linux/drivers/s390/crypto/zcrypt

   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 */
  30struct 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 */
  71struct 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
  84struct 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
  97unsigned int get_cprb_fc(bool userspace, struct ica_xcRB *, struct ap_message *,
  98                         unsigned int *, unsigned short **);
  99unsigned int get_ep11cprb_fc(bool userspace, struct ep11_urb *, struct ap_message *,
 100                             unsigned int *);
 101unsigned int get_rng_fc(struct ap_message *, int *, unsigned int *);
 102
 103#define LOW     10
 104#define MEDIUM  100
 105#define HIGH    500
 106
 107int speed_idx_cca(int);
 108int 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 */
 116static 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
 159void zcrypt_msgtype6_init(void);
 160void zcrypt_msgtype6_exit(void);
 161
 162#endif /* _ZCRYPT_MSGTYPE6_H_ */
 163