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