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_INVALID_SPECIAL_CMD     0x41
  69 #define REP82_ERROR_INVALID_DOMAIN_PRECHECK 0x42
  70 #define REP82_ERROR_RESERVED_FIELDO         0x50 /* old value   */
  71 #define REP82_ERROR_WORD_ALIGNMENT          0x60
  72 #define REP82_ERROR_MESSAGE_LENGTH          0x80
  73 #define REP82_ERROR_OPERAND_INVALID         0x82
  74 #define REP82_ERROR_OPERAND_SIZE            0x84
  75 #define REP82_ERROR_EVEN_MOD_IN_OPND        0x85
  76 #define REP82_ERROR_RESERVED_FIELD          0x88
  77 #define REP82_ERROR_INVALID_DOMAIN_PENDING  0x8A
  78 #define REP82_ERROR_FILTERED_BY_HYPERVISOR  0x8B
  79 #define REP82_ERROR_TRANSPORT_FAIL          0x90
  80 #define REP82_ERROR_PACKET_TRUNCATED        0xA0
  81 #define REP82_ERROR_ZERO_BUFFER_LEN         0xB0
  82
  83 #define REP88_ERROR_MODULE_FAILURE          0x10
  84
  85 #define REP88_ERROR_MESSAGE_TYPE            0x20
  86 #define REP88_ERROR_MESSAGE_MALFORMD        0x22
  87 #define REP88_ERROR_MESSAGE_LENGTH          0x23
  88 #define REP88_ERROR_RESERVED_FIELD          0x24
  89 #define REP88_ERROR_KEY_TYPE                0x34
  90 #define REP88_ERROR_INVALID_KEY     0x82 /* CEX2A       */
  91 #define REP88_ERROR_OPERAND                 0x84 /* CEX2A       */
  92 #define REP88_ERROR_OPERAND_EVEN_MOD        0x85 /* CEX2A       */
  93
  94 static inline int convert_error(struct zcrypt_queue *zq,
  95                                 struct ap_message *reply)
  96 {
  97         struct error_hdr *ehdr = reply->message;
  98         int card = AP_QID_CARD(zq->queue->qid);
  99         int queue = AP_QID_QUEUE(zq->queue->qid);
 100
 101         switch (ehdr->reply_code) {
 102         case REP82_ERROR_OPERAND_INVALID:
 103         case REP82_ERROR_OPERAND_SIZE:
 104         case REP82_ERROR_EVEN_MOD_IN_OPND:
 105         case REP88_ERROR_MESSAGE_MALFORMD:
 106         case REP82_ERROR_INVALID_DOMAIN_PRECHECK:
 107         case REP82_ERROR_INVALID_DOMAIN_PENDING:
 108         case REP82_ERROR_INVALID_SPECIAL_CMD:
 109         case REP82_ERROR_FILTERED_BY_HYPERVISOR:
 110         //   REP88_ERROR_INVALID_KEY            // '82' CEX2A
 111         //   REP88_ERROR_OPERAND                // '84' CEX2A
 112         //   REP88_ERROR_OPERAND_EVEN_MOD       // '85' CEX2A
 113                 /* Invalid input data. */
 114                 ZCRYPT_DBF(DBF_WARN,
 115                            "device=%02x.%04x reply=0x%02x => rc=EINVAL\n",
 116                            card, queue, ehdr->reply_code);
 117                 return -EINVAL;
 118         case REP82_ERROR_MESSAGE_TYPE:
 119         //   REP88_ERROR_MESSAGE_TYPE           // '20' CEX2A
 120                 /*
 121                  * To sent a message of the wrong type is a bug in the
 122                  * device driver. Send error msg, disable the device
 123                  * and then repeat the request.
 124                  */
 125                 atomic_set(&zcrypt_rescan_req, 1);
 126                 zq->online = 0;
 127                 pr_err("Cryptographic device %02x.%04x failed and was set offline\n",
 128                        card, queue);
 129                 ZCRYPT_DBF(DBF_ERR,
 130                            "device=%02x.%04x reply=0x%02x => online=0 rc=EAGAIN\n",
 131                            card, queue, ehdr->reply_code);
 132                 return -EAGAIN;
 133         case REP82_ERROR_TRANSPORT_FAIL:
 134         case REP82_ERROR_MACHINE_FAILURE:
 135         //   REP88_ERROR_MODULE_FAILURE         // '10' CEX2A
 136                 /* If a card fails disable it and repeat the request. */
 137                 atomic_set(&zcrypt_rescan_req, 1);
 138                 zq->online = 0;
 139                 pr_err("Cryptographic device %02x.%04x failed and was set offline\n",
 140                        card, queue);
 141                 ZCRYPT_DBF(DBF_ERR,
 142                            "device=%02x.%04x reply=0x%02x => online=0 rc=EAGAIN\n",
 143                            card, queue, ehdr->reply_code);
 144                 return -EAGAIN;
 145         default:
 146                 zq->online = 0;
 147                 pr_err("Cryptographic device %02x.%04x failed and was set offline\n",
 148                        card, queue);
 149                 ZCRYPT_DBF(DBF_ERR,
 150                            "device=%02x.%04x reply=0x%02x => online=0 rc=EAGAIN\n",
 151                            card, queue, ehdr->reply_code);
 152                 return -EAGAIN; /* repeat the request on a different device. */
 153         }
 154 }
 155
 156 #endif /* _ZCRYPT_ERROR_H_ */