drivers/s390/crypto/zcrypt_error.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  *  Copyright IBM Corp. 2001, 2006
   4  *  Author(s): Robert Burroughs
   5  *             Eric Rossman ([email protected])
   6  *
   7  *  Hotplug & misc device support: Jochen Roehrig ([email protected])
   8  *  Major cleanup & driver split: Martin Schwidefsky <[email protected]>
   9  */
  10
  11 #ifndef _ZCRYPT_ERROR_H_
  12 #define _ZCRYPT_ERROR_H_
  13
  14 #include <linux/atomic.h>
  15 #include "zcrypt_debug.h"
  16 #include "zcrypt_api.h"
  17 #include "zcrypt_msgtype6.h"
  18
  19 /**
  20  * Reply Messages
  21  *
  22  * Error reply messages are of two types:
  23  *    82:  Error (see below)
  24  *    88:  Error (see below)
  25  * Both type 82 and type 88 have the same structure in the header.
  26  *
  27  * Request reply messages are of three known types:
  28  *    80:  Reply from a Type 50 Request (see CEX2A-RELATED STRUCTS)
  29  *    84:  Reply from a Type 4 Request (see PCICA-RELATED STRUCTS)
  30  *    86:  Reply from a Type 6 Request (see PCICC/PCIXCC/CEX2C-RELATED STRUCTS)
  31  *
  32  */
  33 struct error_hdr {
  34         unsigned char reserved1;        /* 0x00                 */
  35         unsigned char type;             /* 0x82 or 0x88         */
  36         unsigned char reserved2[2];     /* 0x0000               */
  37         unsigned char reply_code;       /* reply code           */
  38         unsigned char reserved3[3];     /* 0x000000             */
  39 };
  40
  41 #define TYPE82_RSP_CODE 0x82
  42 #define TYPE88_RSP_CODE 0x88
  43
  44 #define REP82_ERROR_MACHINE_FAILURE         0x10
  45 #define REP82_ERROR_PREEMPT_FAILURE         0x12
  46 #define REP82_ERROR_CHECKPT_FAILURE         0x14
  47 #define REP82_ERROR_MESSAGE_TYPE            0x20
  48 #define REP82_ERROR_INVALID_COMM_CD         0x21 /* Type 84     */
  49 #define REP82_ERROR_INVALID_MSG_LEN         0x23
  50 #define REP82_ERROR_RESERVD_FIELD           0x24 /* was 0x50    */
  51 #define REP82_ERROR_FORMAT_FIELD            0x29
  52 #define REP82_ERROR_INVALID_COMMAND         0x30
  53 #define REP82_ERROR_MALFORMED_MSG           0x40
  54 #define REP82_ERROR_INVALID_SPECIAL_CMD     0x41
  55 #define REP82_ERROR_INVALID_DOMAIN_PRECHECK 0x42
  56 #define REP82_ERROR_RESERVED_FIELDO         0x50 /* old value   */
  57 #define REP82_ERROR_WORD_ALIGNMENT          0x60
  58 #define REP82_ERROR_MESSAGE_LENGTH          0x80
  59 #define REP82_ERROR_OPERAND_INVALID         0x82
  60 #define REP82_ERROR_OPERAND_SIZE            0x84
  61 #define REP82_ERROR_EVEN_MOD_IN_OPND        0x85
  62 #define REP82_ERROR_RESERVED_FIELD          0x88
  63 #define REP82_ERROR_INVALID_DOMAIN_PENDING  0x8A
  64 #define REP82_ERROR_TRANSPORT_FAIL          0x90
  65 #define REP82_ERROR_PACKET_TRUNCATED        0xA0
  66 #define REP82_ERROR_ZERO_BUFFER_LEN         0xB0
  67
  68 #define REP88_ERROR_MODULE_FAILURE          0x10
  69
  70 #define REP88_ERROR_MESSAGE_TYPE            0x20
  71 #define REP88_ERROR_MESSAGE_MALFORMD        0x22
  72 #define REP88_ERROR_MESSAGE_LENGTH          0x23
  73 #define REP88_ERROR_RESERVED_FIELD          0x24
  74 #define REP88_ERROR_KEY_TYPE                0x34
  75 #define REP88_ERROR_INVALID_KEY     0x82 /* CEX2A       */
  76 #define REP88_ERROR_OPERAND                 0x84 /* CEX2A       */
  77 #define REP88_ERROR_OPERAND_EVEN_MOD        0x85 /* CEX2A       */
  78
  79 static inline int convert_error(struct zcrypt_queue *zq,
  80                                 struct ap_message *reply)
  81 {
  82         struct error_hdr *ehdr = reply->message;
  83         int card = AP_QID_CARD(zq->queue->qid);
  84         int queue = AP_QID_QUEUE(zq->queue->qid);
  85
  86         switch (ehdr->reply_code) {
  87         case REP82_ERROR_OPERAND_INVALID:
  88         case REP82_ERROR_OPERAND_SIZE:
  89         case REP82_ERROR_EVEN_MOD_IN_OPND:
  90         case REP88_ERROR_MESSAGE_MALFORMD:
  91         case REP82_ERROR_INVALID_DOMAIN_PRECHECK:
  92         case REP82_ERROR_INVALID_DOMAIN_PENDING:
  93         case REP82_ERROR_INVALID_SPECIAL_CMD:
  94         //   REP88_ERROR_INVALID_KEY            // '82' CEX2A
  95         //   REP88_ERROR_OPERAND                // '84' CEX2A
  96         //   REP88_ERROR_OPERAND_EVEN_MOD       // '85' CEX2A
  97                 /* Invalid input data. */
  98                 ZCRYPT_DBF(DBF_WARN,
  99                            "device=%02x.%04x reply=0x%02x => rc=EINVAL\n",
 100                            card, queue, ehdr->reply_code);
 101                 return -EINVAL;
 102         case REP82_ERROR_MESSAGE_TYPE:
 103         //   REP88_ERROR_MESSAGE_TYPE           // '20' CEX2A
 104                 /*
 105                  * To sent a message of the wrong type is a bug in the
 106                  * device driver. Send error msg, disable the device
 107                  * and then repeat the request.
 108                  */
 109                 atomic_set(&zcrypt_rescan_req, 1);
 110                 zq->online = 0;
 111                 pr_err("Cryptographic device %02x.%04x failed and was set offline\n",
 112                        card, queue);
 113                 ZCRYPT_DBF(DBF_ERR,
 114                            "device=%02x.%04x reply=0x%02x => online=0 rc=EAGAIN\n",
 115                            card, queue, ehdr->reply_code);
 116                 return -EAGAIN;
 117         case REP82_ERROR_TRANSPORT_FAIL:
 118                 /* Card or infrastructure failure, disable card */
 119                 atomic_set(&zcrypt_rescan_req, 1);
 120                 zq->online = 0;
 121                 pr_err("Cryptographic device %02x.%04x failed and was set offline\n",
 122                        card, queue);
 123                 /* For type 86 response show the apfs value (failure reason) */
 124                 if (ehdr->type == TYPE86_RSP_CODE) {
 125                         struct {
 126                                 struct type86_hdr hdr;
 127                                 struct type86_fmt2_ext fmt2;
 128                         } __packed * head = reply->message;
 129                         unsigned int apfs = *((u32 *)head->fmt2.apfs);
 130
 131                         ZCRYPT_DBF(DBF_ERR,
 132                                    "device=%02x.%04x reply=0x%02x apfs=0x%x => online=0 rc=EAGAIN\n",
 133                                    card, queue, apfs, ehdr->reply_code);
 134                 } else
 135                         ZCRYPT_DBF(DBF_ERR,
 136                                    "device=%02x.%04x reply=0x%02x => online=0 rc=EAGAIN\n",
 137                                    card, queue, ehdr->reply_code);
 138                 return -EAGAIN;
 139         case REP82_ERROR_MACHINE_FAILURE:
 140         //   REP88_ERROR_MODULE_FAILURE         // '10' CEX2A
 141                 /* If a card fails disable it and repeat the request. */
 142                 atomic_set(&zcrypt_rescan_req, 1);
 143                 zq->online = 0;
 144                 pr_err("Cryptographic device %02x.%04x failed and was set offline\n",
 145                        card, queue);
 146                 ZCRYPT_DBF(DBF_ERR,
 147                            "device=%02x.%04x reply=0x%02x => online=0 rc=EAGAIN\n",
 148                            card, queue, ehdr->reply_code);
 149                 return -EAGAIN;
 150         default:
 151                 zq->online = 0;
 152                 pr_err("Cryptographic device %02x.%04x failed and was set offline\n",
 153                        card, queue);
 154                 ZCRYPT_DBF(DBF_ERR,
 155                            "device=%02x.%04x reply=0x%02x => online=0 rc=EAGAIN\n",
 156                            card, queue, ehdr->reply_code);
 157                 return -EAGAIN; /* repeat the request on a different device. */
 158         }
 159 }
 160
 161 #endif /* _ZCRYPT_ERROR_H_ */