LXR linux/drivers/s390/crypto/zcrypt

   1/*
   2 *  zcrypt 2.1.0
   3 *
   4 *  Copyright IBM Corp. 2001, 2006
   5 *  Author(s): Robert Burroughs
   6 *             Eric Rossman (edrossma@us.ibm.com)
   7 *
   8 *  Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
   9 *  Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
  10 *
  11 * This program is free software; you can redistribute it and/or modify
  12 * it under the terms of the GNU General Public License as published by
  13 * the Free Software Foundation; either version 2, or (at your option)
  14 * any later version.
  15 *
  16 * This program is distributed in the hope that it will be useful,
  17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  19 * GNU General Public License for more details.
  20 *
  21 * You should have received a copy of the GNU General Public License
  22 * along with this program; if not, write to the Free Software
  23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24 */
  25
  26#ifndef _ZCRYPT_ERROR_H_
  27#define _ZCRYPT_ERROR_H_
  28
  29#include <linux/atomic.h>
  30#include "zcrypt_debug.h"
  31#include "zcrypt_api.h"
  32
  33/**
  34 * Reply Messages
  35 *
  36 * Error reply messages are of two types:
  37 *    82:  Error (see below)
  38 *    88:  Error (see below)
  39 * Both type 82 and type 88 have the same structure in the header.
  40 *
  41 * Request reply messages are of three known types:
  42 *    80:  Reply from a Type 50 Request (see CEX2A-RELATED STRUCTS)
  43 *    84:  Reply from a Type 4 Request (see PCICA-RELATED STRUCTS)
  44 *    86:  Reply from a Type 6 Request (see PCICC/PCIXCC/CEX2C-RELATED STRUCTS)
  45 *
  46 */
  47struct error_hdr {
  48        unsigned char reserved1;        /* 0x00                 */
  49        unsigned char type;             /* 0x82 or 0x88         */
  50        unsigned char reserved2[2];     /* 0x0000               */
  51        unsigned char reply_code;       /* reply code           */
  52        unsigned char reserved3[3];     /* 0x000000             */
  53};
  54
  55#define TYPE82_RSP_CODE 0x82
  56#define TYPE88_RSP_CODE 0x88
  57
  58#define REP82_ERROR_MACHINE_FAILURE  0x10
  59#define REP82_ERROR_PREEMPT_FAILURE  0x12
  60#define REP82_ERROR_CHECKPT_FAILURE  0x14
  61#define REP82_ERROR_MESSAGE_TYPE     0x20
  62#define REP82_ERROR_INVALID_COMM_CD  0x21       /* Type 84      */
  63#define REP82_ERROR_INVALID_MSG_LEN  0x23
  64#define REP82_ERROR_RESERVD_FIELD    0x24       /* was 0x50     */
  65#define REP82_ERROR_FORMAT_FIELD     0x29
  66#define REP82_ERROR_INVALID_COMMAND  0x30
  67#define REP82_ERROR_MALFORMED_MSG    0x40
  68#define REP82_ERROR_RESERVED_FIELDO  0x50       /* old value    */
  69#define REP82_ERROR_WORD_ALIGNMENT   0x60
  70#define REP82_ERROR_MESSAGE_LENGTH   0x80
  71#define REP82_ERROR_OPERAND_INVALID  0x82
  72#define REP82_ERROR_OPERAND_SIZE     0x84
  73#define REP82_ERROR_EVEN_MOD_IN_OPND 0x85
  74#define REP82_ERROR_RESERVED_FIELD   0x88
  75#define REP82_ERROR_TRANSPORT_FAIL   0x90
  76#define REP82_ERROR_PACKET_TRUNCATED 0xA0
  77#define REP82_ERROR_ZERO_BUFFER_LEN  0xB0
  78
  79#define REP88_ERROR_MODULE_FAILURE   0x10
  80
  81#define REP88_ERROR_MESSAGE_TYPE     0x20
  82#define REP88_ERROR_MESSAGE_MALFORMD 0x22
  83#define REP88_ERROR_MESSAGE_LENGTH   0x23
  84#define REP88_ERROR_RESERVED_FIELD   0x24
  85#define REP88_ERROR_KEY_TYPE         0x34
  86#define REP88_ERROR_INVALID_KEY      0x82       /* CEX2A        */
  87#define REP88_ERROR_OPERAND          0x84       /* CEX2A        */
  88#define REP88_ERROR_OPERAND_EVEN_MOD 0x85       /* CEX2A        */
  89
  90static inline int convert_error(struct zcrypt_device *zdev,
  91                                struct ap_message *reply)
  92{
  93        struct error_hdr *ehdr = reply->message;
  94
  95        switch (ehdr->reply_code) {
  96        case REP82_ERROR_OPERAND_INVALID:
  97        case REP82_ERROR_OPERAND_SIZE:
  98        case REP82_ERROR_EVEN_MOD_IN_OPND:
  99        case REP88_ERROR_MESSAGE_MALFORMD:
 100        //   REP88_ERROR_INVALID_KEY            // '82' CEX2A
 101        //   REP88_ERROR_OPERAND                // '84' CEX2A
 102        //   REP88_ERROR_OPERAND_EVEN_MOD       // '85' CEX2A
 103                /* Invalid input data. */
 104                return -EINVAL;
 105        case REP82_ERROR_MESSAGE_TYPE:
 106        //   REP88_ERROR_MESSAGE_TYPE           // '20' CEX2A
 107                /*
 108                 * To sent a message of the wrong type is a bug in the
 109                 * device driver. Warn about it, disable the device
 110                 * and then repeat the request.
 111                 */
 112                WARN_ON(1);
 113                atomic_set(&zcrypt_rescan_req, 1);
 114                zdev->online = 0;
 115                ZCRYPT_DBF_DEV(DBF_ERR, zdev, "dev%04xo%drc%d",
 116                               zdev->ap_dev->qid,
 117                               zdev->online, ehdr->reply_code);
 118                return -EAGAIN;
 119        case REP82_ERROR_TRANSPORT_FAIL:
 120        case REP82_ERROR_MACHINE_FAILURE:
 121        //   REP88_ERROR_MODULE_FAILURE         // '10' CEX2A
 122                /* If a card fails disable it and repeat the request. */
 123                atomic_set(&zcrypt_rescan_req, 1);
 124                zdev->online = 0;
 125                ZCRYPT_DBF_DEV(DBF_ERR, zdev, "dev%04xo%drc%d",
 126                               zdev->ap_dev->qid,
 127                               zdev->online, ehdr->reply_code);
 128                return -EAGAIN;
 129        default:
 130                zdev->online = 0;
 131                ZCRYPT_DBF_DEV(DBF_ERR, zdev, "dev%04xo%drc%d",
 132                               zdev->ap_dev->qid,
 133                               zdev->online, ehdr->reply_code);
 134                return -EAGAIN; /* repeat the request on a different device. */
 135        }
 136}
 137
 138#endif /* _ZCRYPT_ERROR_H_ */
 139