summaryrefslogtreecommitdiff
path: root/drivers/s390/crypto/zcrypt_error.h
blob: 46e27b43a8afe7df13dc43af6aaf35e31918f253 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
/* 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_ */