drivers/s390/crypto/zcrypt_error.h

   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  */
  47 struct 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
  90 static 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. Send error msg, disable the device
 110                  * and then repeat the request.
 111                  */
 112                 atomic_set(&zcrypt_rescan_req, 1);
 113                 zdev->online = 0;
 114                 pr_err("Cryptographic device %x failed and was set offline\n",
 115                        zdev->ap_dev->qid);
 116                 ZCRYPT_DBF_DEV(DBF_ERR, zdev, "dev%04xo%drc%d",
 117                         zdev->ap_dev->qid, 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                 pr_err("Cryptographic device %x failed and was set offline\n",
 126                        zdev->ap_dev->qid);
 127                 ZCRYPT_DBF_DEV(DBF_ERR, zdev, "dev%04xo%drc%d",
 128                         zdev->ap_dev->qid, zdev->online, ehdr->reply_code);
 129                 return -EAGAIN;
 130         default:
 131                 zdev->online = 0;
 132                 pr_err("Cryptographic device %x failed and was set offline\n",
 133                        zdev->ap_dev->qid);
 134                 ZCRYPT_DBF_DEV(DBF_ERR, zdev, "dev%04xo%drc%d",
 135                         zdev->ap_dev->qid, zdev->online, ehdr->reply_code);
 136                 return -EAGAIN; /* repeat the request on a different device. */
 137         }
 138 }
 139
 140 #endif /* _ZCRYPT_ERROR_H_ */