siopvar.h revision 1.13
1 /* $NetBSD: siopvar.h,v 1.13 1996/02/03 18:47:10 chuck Exp $ */ 2 3 /* 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Van Jacobson of Lawrence Berkeley Laboratory. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)siopvar.h 7.1 (Berkeley) 5/8/90 39 */ 40 #ifndef _SIOPVAR_H_ 41 #define _SIOPVAR_H_ 42 43 /* 44 * The largest single request will be MAXPHYS bytes which will require 45 * at most MAXPHYS/NBPG+1 chain elements to describe, i.e. if none of 46 * the buffer pages are physically contiguous (MAXPHYS/NBPG) and the 47 * buffer is not page aligned (+1). 48 */ 49 #define DMAMAXIO (MAXPHYS/NBPG+1) 50 51 /* 52 * Data Structure for SCRIPTS program 53 */ 54 struct siop_ds { 55 long scsi_addr; /* SCSI ID & sync */ 56 long idlen; /* Identify message */ 57 char *idbuf; 58 long cmdlen; /* SCSI command */ 59 char *cmdbuf; 60 long stslen; /* Status */ 61 char *stsbuf; 62 long msglen; /* Message */ 63 char *msgbuf; 64 long msginlen; /* Message in */ 65 char *msginbuf; 66 long extmsglen; /* Extended message in */ 67 char *extmsgbuf; 68 long synmsglen; /* Sync transfer request */ 69 char *synmsgbuf; 70 struct { 71 long datalen; 72 char *databuf; 73 } chain[DMAMAXIO]; 74 }; 75 76 /* 77 * ACB. Holds additional information for each SCSI command Comments: We 78 * need a separate scsi command block because we may need to overwrite it 79 * with a request sense command. Basicly, we refrain from fiddling with 80 * the scsi_xfer struct (except do the expected updating of return values). 81 * We'll generally update: xs->{flags,resid,error,sense,status} and 82 * occasionally xs->retries. 83 */ 84 struct siop_acb { 85 TAILQ_ENTRY(siop_acb) chain; 86 struct scsi_xfer *xs; /* SCSI xfer ctrl block from above */ 87 int flags; /* Status */ 88 #define ACB_FREE 0x00 89 #define ACB_ACTIVE 0x01 90 #define ACB_DONE 0x04 91 #define ACB_CHKSENSE 0x08 92 struct scsi_generic cmd; /* SCSI command block */ 93 struct siop_ds ds; 94 void *iob_buf; 95 u_long iob_curbuf; 96 u_long iob_len, iob_curlen; 97 u_char msgout[6]; 98 u_char msg[6]; 99 u_char stat[1]; 100 u_char status; 101 u_char dummy[2]; 102 int clen; 103 char *daddr; /* Saved data pointer */ 104 int dleft; /* Residue */ 105 }; 106 107 /* 108 * Some info about each (possible) target on the SCSI bus. This should 109 * probably have been a "per target+lunit" structure, but we'll leave it at 110 * this for now. Is there a way to reliably hook it up to sc->fordriver?? 111 */ 112 struct siop_tinfo { 113 int cmds; /* #commands processed */ 114 int dconns; /* #disconnects */ 115 int touts; /* #timeouts */ 116 int perrs; /* #parity errors */ 117 int senses; /* #request sense commands sent */ 118 ushort lubusy; /* What local units/subr. are busy? */ 119 u_char flags; 120 u_char period; /* Period suggestion */ 121 u_char offset; /* Offset suggestion */ 122 } tinfo_t; 123 124 struct siop_softc { 125 struct device sc_dev; 126 struct isr sc_isr; 127 128 u_char sc_istat; 129 u_char sc_dstat; 130 u_char sc_sstat0; 131 u_char sc_sstat1; 132 u_long sc_intcode; 133 struct scsi_link sc_link; /* proto for sub devices */ 134 u_long sc_scriptspa; /* physical address of scripts */ 135 siop_regmap_p sc_siopp; /* the SIOP */ 136 u_long sc_active; /* number of active I/O's */ 137 138 /* Lists of command blocks */ 139 TAILQ_HEAD(acb_list, siop_acb) free_list, 140 ready_list, 141 nexus_list; 142 143 struct siop_acb *sc_nexus; /* current command */ 144 #define SIOP_NACB 8 145 struct siop_acb *sc_acb; /* the real command blocks */ 146 struct siop_tinfo sc_tinfo[8]; 147 148 u_short sc_clock_freq; 149 u_char sc_dcntl; 150 u_char sc_ctest7; 151 u_short sc_tcp[4]; 152 u_char sc_flags; 153 u_char sc_sien; 154 u_char sc_dien; 155 u_char sc_minsync; 156 /* one for each target */ 157 struct syncpar { 158 u_char state; 159 u_char sxfer; 160 u_char sbcl; 161 } sc_sync[8]; 162 }; 163 164 /* sc_flags */ 165 #define SIOP_INTSOFF 0x80 /* Interrupts turned off */ 166 #define SIOP_INTDEFER 0x40 /* Level 6 interrupt has been deferred */ 167 #define SIOP_ALIVE 0x01 /* controller initialized */ 168 #define SIOP_SELECTED 0x04 /* bus is in selected state. Needed for 169 correct abort procedure. */ 170 171 /* sync states */ 172 #define SYNC_START 0 /* no sync handshake started */ 173 #define SYNC_SENT 1 /* we sent sync request, no answer yet */ 174 #define SYNC_DONE 2 /* target accepted our (or inferior) settings, 175 or it rejected the request and we stay async */ 176 177 #define MSG_CMD_COMPLETE 0x00 178 #define MSG_EXT_MESSAGE 0x01 179 #define MSG_SAVE_DATA_PTR 0x02 180 #define MSG_RESTORE_PTR 0x03 181 #define MSG_DISCONNECT 0x04 182 #define MSG_INIT_DETECT_ERROR 0x05 183 #define MSG_ABORT 0x06 184 #define MSG_REJECT 0x07 185 #define MSG_NOOP 0x08 186 #define MSG_PARITY_ERROR 0x09 187 #define MSG_BUS_DEVICE_RESET 0x0C 188 #define MSG_IDENTIFY 0x80 189 #define MSG_IDENTIFY_DR 0xc0 /* (disconnect/reconnect allowed) */ 190 #define MSG_SYNC_REQ 0x01 191 192 #define STS_CHECKCOND 0x02 /* Check Condition (ie., read sense) */ 193 #define STS_CONDMET 0x04 /* Condition Met (ie., search worked) */ 194 #define STS_BUSY 0x08 195 #define STS_INTERMED 0x10 /* Intermediate status sent */ 196 #define STS_EXT 0x80 /* Extended status valid */ 197 198 void siop_minphys __P((struct buf *bp)); 199 int siop_scsicmd __P((struct scsi_xfer *)); 200 201 #endif /* _SIOPVAR_H */ 202
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