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 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* 27 * SCSI device structure. 28 * 29 * All SCSI target drivers will have one of these per target/lun/sfunc. 30 * It is allocated and initialized by the framework SCSA HBA nexus code 31 * for each SCSI target dev_info_t node during HBA nexus DDI_CTLOPS_INITCHILD 32 * processing of a child device node just prior to tran_tgt_init(9E). A 33 * pointer the the scsi_device(9S) structure is stored in the 34 * driver-private data field of the target device's dev_info_t node (in 35 * 'devi_driver_data') and can be retrieved by ddi_get_driver_private(9F). 36 */ 37 #ifndef _SYS_SCSI_CONF_DEVICE_H 38 #define _SYS_SCSI_CONF_DEVICE_H 39 40 #include <sys/scsi/scsi_types.h> 41 42 #ifdef __cplusplus 43 extern "C" { 44 #endif 45 46 struct scsi_device { 47 /* 48 * Routing information for a SCSI device (target/lun/sfunc). 49 * 50 * The scsi_address(9S) structure contains a pointer to the 51 * scsi_hba_tran(9S) of the transport. 52 * 53 * For devices below an HBA that uses SCSI_HBA_ADDR_SPI 54 * unit-addressing, the scsi_address(9S) information contains 55 * decoded target/lun addressing information. 56 * 57 * For devices below an HBA that uses SCSI_HBA_ADDR_COMPLEX 58 * unit-addressing, the scsi_address(9S) information contains a 59 * pointer to the scsi_device(9S) structure and the HBA can maintain 60 * its private per-unit-address/per-scsi_device information using 61 * scsi_address_device(9F) and scsi_device_hba_private_[gs]et(9F). 62 * 63 * NOTE: The scsi_address(9S) structure gets structure-copied into 64 * the scsi_pkt(9S) 'pkt_address' field. Having a pointer to the 65 * scsi_device(9S) structure within the scsi_address(9S) allows 66 * the SCSA framework to reflect generic changes in device state 67 * at scsi_pkt_comp(9F) time (given just a scsi_pkt(9S) pointer). 68 * 69 * NOTE: The older SCSI_HBA_TRAN_CLONE method of supporting 70 * SCSI-3 devices is still supported, but use is discouraged. 71 */ 72 struct scsi_address sd_address; 73 74 /* Cross-reference to target device's dev_info_t. */ 75 dev_info_t *sd_dev; 76 77 /* 78 * Target driver mutex for this device. Initialized by SCSA HBA 79 * framework code prior to probe(9E) or attach(9E) of scsi_device. 80 */ 81 kmutex_t sd_mutex; 82 83 /* 84 * SCSA private: use is associated with implementation of 85 * SCSI_HBA_ADDR_COMPLEX scsi_device_hba_private_[gs]et(9F). 86 * The HBA driver can store a pointer to per-scsi_device(9S) 87 * HBA private data during its tran_tgt_init(9E) implementation 88 * by calling scsi_device_hba_private_set(9F), and free that 89 * pointer during tran_tgt_fini(9E). At tran_send(9E) time, the 90 * HBA driver can use scsi_address_device(9F) to obtain a pointer 91 * to the scsi_device(9S) structure, and then gain access to 92 * its per-scsi_device(9S) hba private data by calling 93 * scsi_device_hba_private_get(9F). 94 */ 95 void *sd_hba_private; 96 97 /* 98 * If scsi_slave is used to probe out this device, a scsi_inquiry data 99 * structure will be allocated and an INQUIRY command will be run to 100 * fill it in. 101 * 102 * The allocation will be done via ddi_iopb_alloc, so any manual 103 * freeing may be done by ddi_iopb_free. 104 * 105 * The inquiry data is allocated/refreshed by scsi_probe/scsi_slave 106 * and freed by uninitchild (inquiry data is no longer freed by 107 * scsi_unprobe/scsi_unslave). 108 * 109 * NOTE: Additional device identity information may be available 110 * as properties of sd_dev. 111 */ 112 struct scsi_inquiry *sd_inq; 113 114 /* 115 * Place to point to an extended request sense buffer. 116 * The target driver is responsible for managing this. 117 */ 118 struct scsi_extended_sense *sd_sense; 119 120 /* 121 * Target driver 'private' information. Typically a pointer to target 122 * driver private ddi_soft_state(9F) information for the device. This 123 * information is typically established in target driver attach(9E), 124 * and freed in the target driver detach(9E). 125 * 126 * LEGACY: For a scsi_device structure allocated by scsi_vhci during 127 * online of a path, this was set by scsi_vhci to point to the 128 * pathinfo node. Please use sd_pathinfo instead. 129 */ 130 void *sd_private; 131 132 /* 133 * FMA capabilities of scsi_device. 134 */ 135 int sd_fm_capable; 136 137 /* 138 * mdi_pathinfo_t pointer to pathinfo node for scsi_device structure 139 * allocated by the scsi_vhci for transport to a specific pHCI path. 140 */ 141 void *sd_pathinfo; 142 143 /* 144 * The 'sd_tran_safe' field is a grotty hack that allows direct-access 145 * (non-scsa) drivers (like chs, ata, and mlx - which all make cmdk 146 * children) to *illegally* put their own vector in the scsi_address(9S) 147 * 'a_hba_tran' field. When all the drivers that overwrite 148 * 'a_hba_tran' are fixed, we can remove sd_tran_safe (and make 149 * scsi_hba.c code trust that the 'sd_address.a_hba_tran' established 150 * during initchild is still valid when uninitchild occurs). 151 * 152 * NOTE: This hack is also shows up in the DEVP_TO_TRAN implementation 153 * in scsi_confsubr.c. 154 * 155 * NOTE: The 'sd_tran_safe' field is only referenced by SCSA framework 156 * code, so always keeping it at the end of the scsi_device structure 157 * (until it can be removed) is OK. It use to be called 'sd_reserved'. 158 */ 159 struct scsi_hba_tran *sd_tran_safe; 160 161 #ifdef SCSI_SIZE_CLEAN_VERIFY 162 /* 163 * Must be last: Building a driver with-and-without 164 * -DSCSI_SIZE_CLEAN_VERIFY, and checking driver modules for 165 * differences with a tools like 'wsdiff' allows a developer to verify 166 * that their driver has no dependencies on scsi*(9S) size. 167 */ 168 int _pad[8]; 169 #endif /* SCSI_SIZE_CLEAN_VERIFY */ 170 }; 171 172 #ifdef _KERNEL 173 /* The following interfaces are public */ 174 int scsi_probe(struct scsi_device *sd, int (*callback)(void)); 175 void scsi_unprobe(struct scsi_device *sd); 176 177 /* The following scsi_device interfaces are currently private */ 178 size_t scsi_device_size(); 179 180 /* The interfaces are for drivers that use to SCSI_HBA_ADDR_COMPLEX */ 181 struct scsi_device *scsi_address_device(struct scsi_address *sa); 182 void scsi_device_hba_private_set(struct scsi_device *sd, void *data); 183 void *scsi_device_hba_private_get(struct scsi_device *sd); 184 185 /* The following interfaces are obsolete */ 186 int scsi_slave(struct scsi_device *sd, int (*callback)(void)); 187 void scsi_unslave(struct scsi_device *sd); 188 #endif /* _KERNEL */ 189 190 #ifdef __cplusplus 191 } 192 #endif 193 194 #endif /* _SYS_SCSI_CONF_DEVICE_H */ 195