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 #ifndef _SYS_SCSI_SCSI_PKT_H 27 #define _SYS_SCSI_SCSI_PKT_H 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #include <sys/scsi/scsi_types.h> 32 33 #ifdef __cplusplus 34 extern "C" { 35 #endif 36 37 #ifdef _KERNEL 38 /* 39 * SCSI packet definition. 40 * 41 * This structure defines the packet which is allocated by a library 42 * function and handed to a target driver. The target driver fills 43 * in some information, and passes it to the library for transport 44 * to an addressed SCSI device. The host adapter found by 45 * the library fills in some other information as the command is 46 * processed. When the command completes (or can be taken no further) 47 * the function specified in the packet is called with a pointer to 48 * the packet as it argument. From fields within the packet, the target 49 * driver can determine the success or failure of the command. 50 */ 51 struct scsi_pkt { 52 opaque_t pkt_ha_private; /* private data for host adapter */ 53 struct scsi_address pkt_address; /* destination packet is for */ 54 opaque_t pkt_private; /* private data for target driver */ 55 void (*pkt_comp)(struct scsi_pkt *); /* completion routine */ 56 uint_t pkt_flags; /* flags */ 57 int pkt_time; /* time allotted to complete command */ 58 uchar_t *pkt_scbp; /* pointer to status block */ 59 uchar_t *pkt_cdbp; /* pointer to command block */ 60 ssize_t pkt_resid; /* data bytes not transferred */ 61 uint_t pkt_state; /* state of command */ 62 uint_t pkt_statistics; /* statistics */ 63 uchar_t pkt_reason; /* reason completion called */ 64 65 /* 66 * The DDI does not allow a driver to allocate it's own scsi_pkt(9S), 67 * a driver should not have *any* compiled in dependencies on 68 * "sizeof (struct scsi_pkt)". If the driver has such dependencies, it 69 * limits SCSA's ability to evolve. The proper way for an HBA to 70 * allocate a scsi_pkt is via scsi_hba_pkt_alloc(9F), or the newer 71 * tran_setup_pkt(9E) interfaces. Allocation rules have been in place 72 * for many years, unfortunately a significant number of drivers 73 * are still broken. 74 * 75 * NB: Until we can trust drivers to follow DDI scsi_pkt(9S) allocation 76 * rules, access to all fields below require special consideration. 77 * Access to these fields is limited to code paths that 'know' correct 78 * scsi_pkt allocation interfaces must have been used. This means that 79 * any target driver access to these fields is suspect, since a target 80 * knows nothing about how an HBA drivers performs scsi_pkt allocation. 81 * 82 * NB: A private scsi_pkt_size() interface has been added to simplify 83 * 'fixing' legacy HBA drivers. Use of scsi_pkt_size() is only 84 * appropriate when the effort/cost of fixing a legacy driver to use 85 * proper DDI scsi_pkt allocation interfaces is too great given the 86 * remaining driver life. New HBA drivers should *not* use 87 * scsi_pkt_size(). 88 * 89 * NB: While HBA drivers with violations are being fixed, in 90 * rare cases access conditioned by scsi_pkt_allocated_correctly() is 91 * permitted. 92 */ 93 /* HBA driver only, iff scsi_hba_pkt_alloc(9F)|tran_seup_pkt(9E) used */ 94 uint_t pkt_cdblen; /* length of pkt_cdbp */ 95 uint_t pkt_tgtlen; /* length of pkt_private */ 96 uint_t pkt_scblen; /* lenght of pkt_scbp */ 97 98 /* HBA driver only, iff tran_seup_pkt(9E) used */ 99 ddi_dma_handle_t pkt_handle; /* private */ 100 uint_t pkt_numcookies; /* number of DMA cookies */ 101 off_t pkt_dma_offset; /* private */ 102 size_t pkt_dma_len; /* private */ 103 uint_t pkt_dma_flags; /* DMA flags */ 104 ddi_dma_cookie_t *pkt_cookies; /* array of DMA cookies */ 105 106 /* private: iff scsi_pkt_allocated_correctly() */ 107 int pkt_path_instance; /* pHCI transport path */ 108 109 #ifdef SCSI_SIZE_CLEAN_VERIFY 110 /* 111 * Must be last: Building a driver with-and-without 112 * -DSCSI_SIZE_CLEAN_VERIFY, and checking driver modules for 113 * differences with a tools like 'wsdiff' allows a developer to verify 114 * that their driver has no dependencies on scsi*(9S) size. 115 */ 116 int i_pkt_pad[8]; 117 #endif /* SCSI_SIZE_CLEAN_VERIFY */ 118 }; 119 #endif /* _KERNEL */ 120 121 /* 122 * Definitions for the pkt_flags field. 123 */ 124 125 /* 126 * Following defines are generic. 127 */ 128 #define FLAG_STAG 0x4000 /* Run command with Simple attribute */ 129 #define FLAG_OTAG 0x2000 /* Run command with Ordered attribute */ 130 #define FLAG_HTAG 0x1000 /* Run command with Head of Queue attribute */ 131 #define FLAG_TAGMASK (FLAG_HTAG|FLAG_OTAG|FLAG_STAG) 132 133 #define FLAG_ACA 0x0100 /* internal; do not use */ 134 #define FLAG_HEAD 0x8000 /* This cmd should be put at the head */ 135 /* of the HBA driver's queue */ 136 #define FLAG_SENSING 0x0400 /* Running request sense for failed pkt */ 137 #define FLAG_NOINTR 0x0001 /* Run command with no cmd completion */ 138 /* callback; command has been completed */ 139 /* upon return from scsi_transport(9F) */ 140 141 /* 142 * Following defines are appropriate for SCSI parallel bus. 143 */ 144 #define FLAG_NODISCON 0x0002 /* Run command without disconnects */ 145 #define FLAG_NOPARITY 0x0008 /* Run command without parity checking */ 146 #define FLAG_RENEGOTIATE_WIDE_SYNC \ 147 0x1000000 /* Do wide and sync renegotiation before */ 148 /* transporting this command to target */ 149 150 /* 151 * Following defines are internal i.e. not part of DDI. 152 */ 153 #define FLAG_IMMEDIATE_CB \ 154 0x0800 /* Immediate callback on command */ 155 /* completion, ie. do not defer */ 156 157 /* 158 * Following defines are for USCSI options. 159 */ 160 #define FLAG_SILENT 0x00010000 161 #define FLAG_DIAGNOSE 0x00020000 162 #define FLAG_ISOLATE 0x00040000 163 164 /* 165 * Following define is for scsi_vhci. 166 * NOQUEUE If pHCI cannot transport the command to the device, 167 * do not queue the pkt in pHCI. Return immediately with 168 * TRAN_BUSY. 169 * PATH_INSTANCE Select specific path (pkt_path_instance). 170 * We need both a pkt_path_instance field and flag bit so 171 * that a retry after a path failure, which sets 172 * pkt_path_instance to failed path, does not select the 173 * failed path. 174 */ 175 #define FLAG_NOQUEUE 0x80000000 176 #define FLAG_PKT_PATH_INSTANCE 0x40000000 /* Tell vhci the path to use */ 177 178 /* 179 * Definitions for the pkt_reason field. 180 */ 181 182 /* 183 * Following defines are generic. 184 */ 185 #define CMD_CMPLT 0 /* no transport errors- normal completion */ 186 #define CMD_INCOMPLETE 1 /* transport stopped with not normal state */ 187 #define CMD_DMA_DERR 2 /* dma direction error occurred */ 188 #define CMD_TRAN_ERR 3 /* unspecified transport error */ 189 #define CMD_RESET 4 /* Target completed hard reset sequence */ 190 #define CMD_ABORTED 5 /* Command transport aborted on request */ 191 #define CMD_TIMEOUT 6 /* Command timed out */ 192 #define CMD_DATA_OVR 7 /* Data Overrun */ 193 #define CMD_CMD_OVR 8 /* Command Overrun */ 194 #define CMD_STS_OVR 9 /* Status Overrun */ 195 #define CMD_TERMINATED 22 /* Command transport terminated on request */ 196 197 /* 198 * Following defines are appropriate for SCSI parallel bus. 199 */ 200 #define CMD_BADMSG 10 /* Message not Command Complete */ 201 #define CMD_NOMSGOUT 11 /* Target refused to go to Message Out phase */ 202 #define CMD_XID_FAIL 12 /* Extended Identify message rejected */ 203 #define CMD_IDE_FAIL 13 /* Initiator Detected Error message rejected */ 204 #define CMD_ABORT_FAIL 14 /* Abort message rejected */ 205 #define CMD_REJECT_FAIL 15 /* Reject message rejected */ 206 #define CMD_NOP_FAIL 16 /* No Operation message rejected */ 207 #define CMD_PER_FAIL 17 /* Message Parity Error message rejected */ 208 #define CMD_BDR_FAIL 18 /* Bus Device Reset message rejected */ 209 #define CMD_ID_FAIL 19 /* Identify message rejected */ 210 #define CMD_UNX_BUS_FREE 20 /* Unexpected Bus Free Phase occurred */ 211 #define CMD_TAG_REJECT 21 /* Target rejected our tag message */ 212 #define CMD_DEV_GONE 24 /* The device has been removed */ 213 214 /* Used by scsi_rname(9F) */ 215 #define CMD_REASON_ASCII { \ 216 "cmplt", "incomplete", "dma_derr", "tran_err", "reset", \ 217 "aborted", "timeout", "data_ovr", "cmd_ovr", "sts_ovr", \ 218 "badmsg", "nomsgout", "xid_fail", "ide_fail", "abort_fail", \ 219 "reject_fail", "nop_fail", "per_fail", "bdr_fail", "id_fail", \ 220 "unexpected_bus_free", "tag reject", "terminated", "", "gone", \ 221 NULL } 222 223 /* 224 * Definitions for the pkt_state field 225 */ 226 #define STATE_GOT_BUS 0x01 /* Success in getting SCSI bus */ 227 #define STATE_GOT_TARGET 0x02 /* Successfully connected with target */ 228 #define STATE_SENT_CMD 0x04 /* Command successfully sent */ 229 #define STATE_XFERRED_DATA 0x08 /* Data transfer took place */ 230 #define STATE_GOT_STATUS 0x10 /* SCSI status received */ 231 #define STATE_ARQ_DONE 0x20 /* auto rqsense took place */ 232 #define STATE_XARQ_DONE 0X40 /* extra auto rqsense took place */ 233 234 /* 235 * Definitions for the pkt_statistics field 236 */ 237 238 /* 239 * Following defines are generic. 240 */ 241 #define STAT_BUS_RESET 0x8 /* Reset operation on interconnect */ 242 #define STAT_DEV_RESET 0x10 /* Target completed hard reset sequence */ 243 #define STAT_ABORTED 0x20 /* Command was aborted */ 244 #define STAT_TERMINATED 0x80 /* Command was terminated */ 245 #define STAT_TIMEOUT 0x40 /* Command experienced a timeout */ 246 247 /* 248 * Following defines are appropriate for SCSI parallel bus. 249 */ 250 #define STAT_DISCON 0x1 /* Command experienced a disconnect */ 251 #define STAT_SYNC 0x2 /* Command did a synchronous data transfer */ 252 #define STAT_PERR 0x4 /* Command experienced a SCSI parity error */ 253 254 /* 255 * Definitions for what scsi_transport returns 256 */ 257 #define TRAN_ACCEPT 1 258 #define TRAN_BUSY 0 259 #define TRAN_BADPKT -1 260 #define TRAN_FATAL_ERROR -2 /* HBA cannot accept any pkts */ 261 262 #ifdef _KERNEL 263 /* 264 * Kernel function declarations 265 */ 266 int scsi_transport(struct scsi_pkt *pkt); 267 268 #define pkt_transport scsi_transport 269 270 #define SCSI_POLL_TIMEOUT 60 271 272 #endif /* _KERNEL */ 273 274 #ifdef __cplusplus 275 } 276 #endif 277 278 #endif /* _SYS_SCSI_SCSI_PKT_H */ 279