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/* 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 */
if (ehdr->reply_code == REP82_ERROR_FILTERED_BY_HYPERVISOR &&
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_WARN("%s dev=%02x.%04x RY=0x%02x apfs=0x%x => rc=EINVAL\n",
__func__, card, queue,
ehdr->reply_code, apfs);
} else {
ZCRYPT_DBF_WARN("%s dev=%02x.%04x RY=0x%02x => rc=EINVAL\n",
__func__, 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. Return
* EAGAIN, the upper layer may do a retry on the request.
*/
/* 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_WARN(
"%s dev=%02x.%04x RY=0x%02x apfs=0x%x => bus rescan, rc=EAGAIN\n",
__func__, card, queue, ehdr->reply_code, apfs);
} else {
ZCRYPT_DBF_WARN("%s dev=%02x.%04x RY=0x%02x => bus rescan, rc=EAGAIN\n",
__func__, card, queue,
ehdr->reply_code);
}
return -EAGAIN;
default:
/* Assume request is valid and a retry will be worth it */
ZCRYPT_DBF_WARN("%s dev=%02x.%04x RY=0x%02x => rc=EAGAIN\n",
__func__, card, queue, ehdr->reply_code);
return -EAGAIN;
}
}
#endif /* _ZCRYPT_ERROR_H_ */
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