diff options
Diffstat (limited to 'drivers/s390/crypto/zcrypt_error.h')
| -rw-r--r-- | drivers/s390/crypto/zcrypt_error.h | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/drivers/s390/crypto/zcrypt_error.h b/drivers/s390/crypto/zcrypt_error.h new file mode 100644 index 000000000..39e626e3a --- /dev/null +++ b/drivers/s390/crypto/zcrypt_error.h @@ -0,0 +1,139 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright IBM Corp. 2001, 2006 + * Author(s): Robert Burroughs + * Eric Rossman (edrossma@us.ibm.com) + * + * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com) + * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com> + */ + +#ifndef _ZCRYPT_ERROR_H_ +#define _ZCRYPT_ERROR_H_ + +#include <linux/atomic.h> +#include "zcrypt_debug.h" +#include "zcrypt_api.h" +#include "zcrypt_msgtype6.h" + +/** + * Reply Messages + * + * Error reply messages are of two types: + * 82: Error (see below) + * 88: Error (see below) + * Both type 82 and type 88 have the same structure in the header. + * + * Request reply messages are of three known types: + * 80: Reply from a Type 50 Request (see CEX2A-RELATED STRUCTS) + * 84: Reply from a Type 4 Request (see PCICA-RELATED STRUCTS) + * 86: Reply from a Type 6 Request (see PCICC/PCIXCC/CEX2C-RELATED STRUCTS) + * + */ +struct error_hdr { + unsigned char reserved1; /* 0x00 */ + unsigned char type; /* 0x82 or 0x88 */ + unsigned char reserved2[2]; /* 0x0000 */ + unsigned char reply_code; /* reply code */ + unsigned char reserved3[3]; /* 0x000000 */ +}; + +#define TYPE82_RSP_CODE 0x82 +#define TYPE88_RSP_CODE 0x88 + +#define REP82_ERROR_MACHINE_FAILURE 0x10 +#define REP82_ERROR_PREEMPT_FAILURE 0x12 +#define REP82_ERROR_CHECKPT_FAILURE 0x14 +#define REP82_ERROR_MESSAGE_TYPE 0x20 +#define REP82_ERROR_INVALID_COMM_CD 0x21 /* Type 84 */ +#define REP82_ERROR_INVALID_MSG_LEN 0x23 +#define REP82_ERROR_RESERVD_FIELD 0x24 /* was 0x50 */ +#define REP82_ERROR_FORMAT_FIELD 0x29 +#define REP82_ERROR_INVALID_COMMAND 0x30 +#define REP82_ERROR_MALFORMED_MSG 0x40 +#define REP82_ERROR_INVALID_SPECIAL_CMD 0x41 +#define REP82_ERROR_RESERVED_FIELDO 0x50 /* old value */ +#define REP82_ERROR_WORD_ALIGNMENT 0x60 +#define REP82_ERROR_MESSAGE_LENGTH 0x80 +#define REP82_ERROR_OPERAND_INVALID 0x82 +#define REP82_ERROR_OPERAND_SIZE 0x84 +#define REP82_ERROR_EVEN_MOD_IN_OPND 0x85 +#define REP82_ERROR_RESERVED_FIELD 0x88 +#define REP82_ERROR_INVALID_DOMAIN_PENDING 0x8A +#define REP82_ERROR_FILTERED_BY_HYPERVISOR 0x8B +#define REP82_ERROR_TRANSPORT_FAIL 0x90 +#define REP82_ERROR_PACKET_TRUNCATED 0xA0 +#define REP82_ERROR_ZERO_BUFFER_LEN 0xB0 + +#define REP88_ERROR_MODULE_FAILURE 0x10 +#define REP88_ERROR_MESSAGE_TYPE 0x20 +#define REP88_ERROR_MESSAGE_MALFORMD 0x22 +#define REP88_ERROR_MESSAGE_LENGTH 0x23 +#define REP88_ERROR_RESERVED_FIELD 0x24 +#define REP88_ERROR_KEY_TYPE 0x34 +#define REP88_ERROR_INVALID_KEY 0x82 /* CEX2A */ +#define REP88_ERROR_OPERAND 0x84 /* CEX2A */ +#define REP88_ERROR_OPERAND_EVEN_MOD 0x85 /* CEX2A */ + +static inline int convert_error(struct zcrypt_queue *zq, + struct ap_message *reply) +{ + struct error_hdr *ehdr = reply->msg; + int card = AP_QID_CARD(zq->queue->qid); + int queue = AP_QID_QUEUE(zq->queue->qid); + + switch (ehdr->reply_code) { + case REP82_ERROR_INVALID_MSG_LEN: /* 0x23 */ + case REP82_ERROR_RESERVD_FIELD: /* 0x24 */ + case REP82_ERROR_FORMAT_FIELD: /* 0x29 */ + case REP82_ERROR_MALFORMED_MSG: /* 0x40 */ + case REP82_ERROR_INVALID_SPECIAL_CMD: /* 0x41 */ + case REP82_ERROR_MESSAGE_LENGTH: /* 0x80 */ + case REP82_ERROR_OPERAND_INVALID: /* 0x82 */ + case REP82_ERROR_OPERAND_SIZE: /* 0x84 */ + case REP82_ERROR_EVEN_MOD_IN_OPND: /* 0x85 */ + case REP82_ERROR_INVALID_DOMAIN_PENDING: /* 0x8A */ + case REP82_ERROR_FILTERED_BY_HYPERVISOR: /* 0x8B */ + case REP82_ERROR_PACKET_TRUNCATED: /* 0xA0 */ + case REP88_ERROR_MESSAGE_MALFORMD: /* 0x22 */ + case REP88_ERROR_KEY_TYPE: /* 0x34 */ + /* RY indicates malformed request */ + ZCRYPT_DBF(DBF_WARN, + "dev=%02x.%04x RY=0x%02x => rc=EINVAL\n", + card, queue, ehdr->reply_code); + return -EINVAL; + case REP82_ERROR_MACHINE_FAILURE: /* 0x10 */ + case REP82_ERROR_MESSAGE_TYPE: /* 0x20 */ + case REP82_ERROR_TRANSPORT_FAIL: /* 0x90 */ + /* + * Msg to wrong type or card/infrastructure failure. + * Trigger rescan of the ap bus, trigger retry request. + */ + atomic_set(&zcrypt_rescan_req, 1); + /* For type 86 response show the apfs value (failure reason) */ + if (ehdr->reply_code == REP82_ERROR_TRANSPORT_FAIL && + ehdr->type == TYPE86_RSP_CODE) { + struct { + struct type86_hdr hdr; + struct type86_fmt2_ext fmt2; + } __packed * head = reply->msg; + unsigned int apfs = *((u32 *)head->fmt2.apfs); + + ZCRYPT_DBF(DBF_WARN, + "dev=%02x.%04x RY=0x%02x apfs=0x%x => bus rescan, rc=EAGAIN\n", + card, queue, ehdr->reply_code, apfs); + } else + ZCRYPT_DBF(DBF_WARN, + "dev=%02x.%04x RY=0x%02x => bus rescan, rc=EAGAIN\n", + card, queue, ehdr->reply_code); + return -EAGAIN; + default: + /* Assume request is valid and a retry will be worth it */ + ZCRYPT_DBF(DBF_WARN, + "dev=%02x.%04x RY=0x%02x => rc=EAGAIN\n", + card, queue, ehdr->reply_code); + return -EAGAIN; + } +} + +#endif /* _ZCRYPT_ERROR_H_ */ |