xref: /titanic_41/usr/src/uts/common/sys/scsi/scsi_address.h (revision d842a8cc6ef1bcd99cf74bbf85738031ea3b3858)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  * Copyright (c) 2017, Joyent, Inc.
25  */
26 
27 #ifndef	_SYS_SCSI_SCSI_ADDRESS_H
28 #define	_SYS_SCSI_SCSI_ADDRESS_H
29 
30 #include <sys/scsi/scsi_types.h>
31 
32 #ifdef	__cplusplus
33 extern "C" {
34 #endif
35 
36 /*
37  * SCSI address definition.
38  *
39  * A scsi_address(9S) structure stores the host adapter routing and
40  * scsi_device(9S) unit-address routing information necessary to reference
41  * a specific SCSI target device logical unit function.
42  *
43  * Host adapter routing information is stored in the scsi_hba_tran(9S)
44  * structure, pointed to by the scsi_address(9S) 'a_hba_tran' field.
45  *
46  * The scsi_device(9S) unit-address routing information (i.e. SCSA's
47  * representation of leaf disk/tape driver's "@unit-address" portion of
48  * a /devices path) is maintained in three different forms:
49  *
50  * SCSI_HBA_ADDR_SPI: In SCSI_HBA_ADDR_SPI mode (default), the SCSA
51  *	framework, during initialization, places unit-address property
52  *	information, converted to numeric form, directly into the
53  *	'a_target' and 'a_lun' fields of the scsi_address(9S) structure
54  *	(embedded in the scsi_device(9S) structure). To maintain
55  *	per-scsi_device(9S) state, host adapter drivers often use
56  *	'a_target' and 'a_lun' to index into a large fixed array
57  *	(limited by the drivers idea of maximum supported target and
58  *	lun).
59  *
60  *	NOTE: a_sublun is reserved for internal use only and has never
61  *	been part of DDI scsi_address(9S).
62  *
63  * SCSI_HBA_ADDR_COMPLEX: The host adapter driver will maintain
64  *	per-unit-address/per-scsi_device(9S) HBA private state by using
65  *	scsi_device_hba_private_set(9F) during tran_tgt_init(9E) (using
66  *	property interfaces to obtain/convert unit-address information into
67  *	a host adapter private form).  In SCSI_HBA_ADDR_COMPLEX mode, the SCSA
68  *	framework, prior to tran_tgt_init(9E), places a pointer to the
69  *	scsi_device(9S) in the 'a.a_sd' scsi_address(9S) field, and uses
70  *	'sd_hba_private' to store per-scsi_device hba private data.
71  *
72  * SCSI_HBA_TRAN_CLONE: SCSI_HBA_TRAN_CLONE is an older method for
73  *	supporting devices with non-SPI unit-address. It is still
74  *	supported, but its use is discouraged. From a unit-address
75  *	perspective, operation is similar to SCSI_HBA_ADDR_COMPLEX, but
76  *	per-scsi_device(9S) state is supported via 'cloning' of the
77  *	scsi_hba_tran(9S) structure (to provide a per-scsi_device(9S)
78  *	version of 'tran_tgt_private'/'tran_sd' accessible via
79  *	'a_hba_tran').
80  *
81  * NOTE: Compatible evolution of SCSA is constrained by the fact that the
82  * scsi_address(9S) structure is embedded at the base of the scsi_device(9S)
83  * structure, and is structure copied into the base of each allocated
84  * scsi_pkt(9S) structure.
85  *
86  * In general, device unit-address information is used exclusively by
87  * the host adapter driver (the exception being target drivers
88  * communicating with SCSI Parallel Interconnect (SPI) SCSI-1 devices
89  * that embed SCSI logical unit addressing in the CDB). Target drivers
90  * which need to communicate with SPI SCSI-1 devices that embed logical
91  * unit addresses in the CDB must obtain target and logical unit
92  * addresses from the device's properties (SCSI_ADDR_PROP_TARGET and
93  * SCSI_ADDR_PROP_LUN).
94  */
95 struct scsi_address {
96 	struct scsi_hba_tran	*a_hba_tran;	/* Transport vector */
97 	union {
98 		struct {			/* SPI: */
99 			ushort_t a_target;	/* ua target */
100 			uchar_t	 a_lun;		/* ua lun on target */
101 			uchar_t	 _a_sublun;	/* (private) */
102 		} spi;
103 		struct scsi_device *a_sd;	/* COMPLEX: (private) */
104 	} a;					/* device unit-adddress info */
105 };
106 #define	a_target	a.spi.a_target
107 #define	a_lun		a.spi.a_lun
108 #define	a_sublun	a.spi._a_sublun
109 
110 /* Device unit-address property names */
111 #define	SCSI_ADDR_PROP_TARGET		"target"	/* int */
112 #define	SCSI_ADDR_PROP_LUN		"lun"		/* int */
113 
114 #define	SCSI_ADDR_PROP_TARGET_PORT	"target-port"	/* string */
115 #define	SCSI_ADDR_PROP_LUN64		"lun64"		/* int64 */
116 #define	SCSI_ADDR_PROP_SFUNC		"sfunc"		/* int */
117 
118 #define	SCSI_ADDR_PROP_IPORTUA		"scsi-iport"	/* string */
119 
120 #define	SCSI_ADDR_PROP_SATA_PHY		"sata-phy"	/* int */
121 
122 /*
123  * Addressing property names, values are in string form compatible
124  * with the SCSI_ADDR_PROP_TARGET_PORT part of the related
125  * IEEE-1275 OpenFirmware binding unit-address string.
126  */
127 #define	SCSI_ADDR_PROP_INITIATOR_PORT	"initiator-port"
128 #define	SCSI_ADDR_PROP_ATTACHED_PORT	"attached-port"
129 #define	SCSI_ADDR_PROP_BRIDGE_PORT	"bridge-port"
130 
131 /*
132  * Normalized representation of a scsi_lun (with SCSI-2 lun positioned
133  * for compatibility).
134  */
135 typedef uint64_t	scsi_lun64_t;
136 #define	PRIlun64	PRIx64
137 #ifdef	_LP64
138 #define	SCSI_LUN64_ILLEGAL	(-1L)
139 #else	/* _LP64 */
140 #define	SCSI_LUN64_ILLEGAL	(-1LL)
141 #endif	/* _LP64 */
142 
143 /* Structure of a 64-bit SCSI LUN per SCSI standard */
144 typedef	struct scsi_lun {
145 	uchar_t	sl_lun1_msb;	/* format */
146 	uchar_t	sl_lun1_lsb;	/* first level */
147 	uchar_t	sl_lun2_msb;
148 	uchar_t	sl_lun2_lsb;	/* second level */
149 	uchar_t	sl_lun3_msb;
150 	uchar_t	sl_lun3_lsb;	/* third level */
151 	uchar_t	sl_lun4_msb;
152 	uchar_t	sl_lun4_lsb;	/* fourth level */
153 } scsi_lun_t;
154 
155 /* SCSI standard defined lun addressing methods (in sl_lunX_msb) */
156 #define	SCSI_LUN_AM_MASK	0xC0		/* Address Method Mask */
157 #define	SCSI_LUN_AM_PDEV	0x00		/* Peripheral device AM */
158 #define	SCSI_LUN_AM_FLAT	0x40		/* Flat space AM */
159 #define	SCSI_LUN_AM_LUN		0x80		/* Logical unit AM */
160 #define	SCSI_LUN_AM_EFLAT	0xC0		/* Extended flat space AM */
161 #define	SCSI_LUN_AM_ELUN	0xC0		/* Extended logical unit AM */
162 
163 #ifdef	_KERNEL
164 /* SCSI LUN conversion between SCSI_ADDR_PROP_LUN64 and SCSI standard forms */
165 scsi_lun64_t	scsi_lun_to_lun64(scsi_lun_t lun);
166 scsi_lun_t	scsi_lun64_to_lun(scsi_lun64_t lun64);
167 
168 /* SCSI WWN conversion (property values should be in unit_address form) */
169 int		scsi_wwnstr_to_wwn(const char *wwnstr, uint64_t *wwnp);
170 char		*scsi_wwn_to_wwnstr(uint64_t wwn,
171 		    int unit_address_form, char *wwnstr);
172 void		scsi_wwnstr_hexcase(char *wwnstr, int lower_case);
173 const char	*scsi_wwnstr_skip_ua_prefix(const char *wwnstr);
174 void		scsi_free_wwnstr(char *wwnstr);
175 
176 /*
177  * Buffer lengths for SCSI strings. SCSI_WWN_STRLEN is the length of a WWN
178  * that's not in unit-address form. SCSI_WWN_UA_STRLEN includes the
179  * unit-address. SCSI_WWN_BUFLEN provides a buffer that's large enough for all
180  * of these.
181  */
182 #define	SCSI_WWN_STRLEN	16
183 #define	SCSI_WWN_UA_STRLEN	17
184 #define	SCSI_WWN_BUFLEN	SCSI_MAXNAMELEN
185 
186 #endif	/* _KERNEL */
187 
188 #ifdef	__cplusplus
189 }
190 #endif
191 
192 #endif	/* _SYS_SCSI_SCSI_ADDRESS_H */
193