mhavar.h revision 1.1
1 /* $NetBSD: mhavar.h,v 1.1 1997/10/19 09:29:36 oki Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Peter Galbavy. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Peter Galbavy. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * ACB. Holds additional information for each SCSI command Comments: We 34 * need a separate scsi command block because we may need to overwrite it 35 * with a request sense command. Basicly, we refrain from fiddling with 36 * the scsi_xfer struct (except do the expected updating of return values). 37 * We'll generally update: xs->{flags,resid,error,sense,status} and 38 * occasionally xs->retries. 39 */ 40 struct acb { 41 TAILQ_ENTRY(acb) chain; 42 struct scsipi_xfer *xs; /* SCSI xfer ctrl block from above */ 43 int flags; /* Status */ 44 #define ACB_QNONE 0 45 #define ACB_QFREE 1 46 #define ACB_QREADY 2 47 #define ACB_QNEXUS 3 48 49 #define ACB_QBITS 0x07 50 #define ACB_CHKSENSE 0x08 51 #define ACB_ABORTED 0x10 52 #define ACB_RESET 0x80 53 #define ACB_SETQ(e, q) do (e)->flags = ((e)->flags&~ACB_QBITS)|(q); while(0) 54 struct scsi_generic cmd; /* SCSI command block */ 55 int clen; 56 char *daddr; /* Saved data pointer */ 57 int dleft; /* Residue */ 58 u_char stat; /* SCSI status byte */ 59 60 /* struct spc_dma_seg dma[SPC_NSEG];*/ /* Physical addresses+len */ 61 }; 62 63 /* 64 * Some info about each (possible) target on the SCSI bus. This should 65 * probably have been a "per target+lunit" structure, but we'll leave it at 66 * this for now. 67 */ 68 struct spc_tinfo { 69 int cmds; /* #commands processed */ 70 int dconns; /* #disconnects */ 71 int touts; /* #timeouts */ 72 int perrs; /* #parity errors */ 73 int senses; /* #request sense commands sent */ 74 ushort lubusy; /* What local units/subr. are busy? */ 75 u_char flags; 76 #define T_NEED_TO_RESET 0x01 /* Should send a BUS_DEV_RESET */ 77 #define T_NEGOTIATE 0x02 /* (Re)Negotiate synchronous options */ 78 #define T_BUSY 0x04 /* Target is busy, i.e. cmd in progress */ 79 #define T_SYNCMODE 0x08 /* sync mode has been negotiated */ 80 #define T_SYNCHOFF 0x10 /* .. */ 81 #define T_RSELECTOFF 0x20 /* .. */ 82 u_char period; /* Period suggestion */ 83 u_char offset; /* Offset suggestion */ 84 u_char width; /* Width suggestion */ 85 } tinfo_t; 86 87 struct mha_softc { 88 struct device sc_dev; /* us as a device */ 89 volatile struct mb86601 *sc_iobase; 90 volatile u_char *sc_pc; 91 volatile u_short *sc_ps; 92 volatile u_char *sc_pcx; 93 94 struct scsipi_link sc_link; /* prototype for subdevs */ 95 96 TAILQ_HEAD(, acb) free_list, ready_list, nexus_list; 97 struct acb *sc_nexus; /* current command */ 98 struct acb sc_acb[8]; /* one per target */ 99 struct spc_tinfo sc_tinfo[8]; 100 101 /* Data about the current nexus (updated for every cmd switch) */ 102 u_char *sc_dp; /* Current data pointer */ 103 size_t sc_dleft; /* Data bytes left to transfer */ 104 105 u_char *sc_cp; /* Current command pointer */ 106 size_t sc_cleft; /* Command bytes left to transfer */ 107 108 /* Adapter state */ 109 int sc_phase; /* Copy of what bus phase we are in */ 110 int sc_prevphase; /* Copy of what bus phase we were in */ 111 u_char sc_state; /* State applicable to the adapter */ 112 u_char sc_flags; 113 u_char sc_selid; /* Reselection ID */ 114 volatile u_char sc_spcinitialized; /* */ 115 116 /* Message stuff */ 117 u_char sc_msgpriq; /* Messages we want to send */ 118 u_char sc_msgout; /* What message is on its way out? */ 119 u_char sc_msgoutq; /* Messages sent during last MESSAGE OUT */ 120 u_char sc_lastmsg; /* Message last transmitted */ 121 u_char sc_currmsg; /* Message currently ready to transmit */ 122 #define SPC_MAX_MSG_LEN 8 123 u_char sc_omess[SPC_MAX_MSG_LEN]; 124 u_char *sc_omp; /* Outgoing message pointer */ 125 u_char sc_imess[SPC_MAX_MSG_LEN]; 126 u_char *sc_imp; /* Incoming message pointer */ 127 size_t sc_imlen; 128 129 /* Hardware stuff */ 130 int sc_freq; /* Clock frequency in MHz */ 131 int sc_id; /* our scsi id */ 132 int sc_minsync; /* Minimum sync period / 4 */ 133 int sc_maxsync; /* Maximum sync period / 4 */ 134 }; 135 136 /* values for sc_state */ 137 #define SPC_INIT 0x00 138 #define SPC_IDLE 0x01 /* waiting for something to do */ 139 #define ESP_TMP_UNAVAIL 0x02 /* Don't accept SCSI commands */ 140 #define SPC_SELECTING 0x03 /* SCSI command is arbiting */ 141 #define SPC_RESELECTED 0x04 /* Has been reselected */ 142 #define SPC_HASNEXUS 0x05 /* Actively using the SCSI bus */ 143 #define SPC_CLEANING 0x06 144 #define ESP_SBR 0x07 /* Expect a SCSI RST because we commanded it */ 145 #define SPC_CONNECTED 0x08 /* Actively using the SCSI bus */ 146 #define SPC_DISCONNECT 0x09 /* MSG_DISCONNECT received */ 147 #define SPC_CMDCOMPLETE 0x0a /* MSG_CMDCOMPLETE received */ 148 149 150 /* values for sc_flags */ 151 #define SPC_DROP_MSGI 0x01 /* Discard all msgs (parity err detected) */ 152 #define SPC_DOINGDMA 0x02 /* The FIFO data path is active! */ 153 #define SPC_BUSFREE_OK 0x04 /* Bus free phase is OK. */ 154 #define SPC_SYNCHNEGO 0x08 /* Synch negotiation in progress. */ 155 #define SPC_DISCON 0x10 /* Target sent DISCONNECT msg */ 156 #define SPC_ABORTING 0x20 /* Bailing out */ 157 #define ESP_ICCS 0x40 /* Expect status phase results */ 158 #define ESP_WAITI 0x80 /* Waiting for non-DMA data to arrive */ 159 160 161 /* values for sc_msgout */ 162 #define SEND_DEV_RESET 0x01 163 #define SEND_PARITY_ERROR 0x02 164 #define SEND_INIT_DET_ERR 0x04 165 #define SEND_REJECT 0x08 166 #define SEND_IDENTIFY 0x10 167 #define SEND_ABORT 0x20 168 #define SEND_SDTR 0x40 169 #define SEND_WDTR 0x80 170 171 /* SCSI Status codes */ 172 #define ST_GOOD 0x00 173 #define ST_CHKCOND 0x02 174 #define ST_CONDMET 0x04 175 #define ST_BUSY 0x08 176 #define ST_INTERMED 0x10 177 #define ST_INTERMED_CONDMET 0x14 178 #define ST_RESERVATION_CONFLICT 0x18 179 #define ST_CMD_TERM 0x22 180 #define ST_QUEUE_FULL 0x28 181 182 #define ST_MASK 0x3e /* bit 0,6,7 is reserved */ 183 184 /* phase bits */ 185 #define IOI 0x01 186 #define CDI 0x02 187 #define MSGI 0x04 188 189 /* Information transfer phases */ 190 #define DATA_OUT_PHASE (0) 191 #define DATA_IN_PHASE (IOI) 192 #define COMMAND_PHASE (CDI) 193 #define STATUS_PHASE (CDI|IOI) 194 #define MESSAGE_OUT_PHASE (MSGI|CDI) 195 #define MESSAGE_IN_PHASE (MSGI|CDI|IOI) 196 197 #define PHASE_MASK (MSGI|CDI|IOI) 198 199 /* Some pseudo phases for getphase()*/ 200 #define BUSFREE_PHASE 0x100 /* Re/Selection no longer valid */ 201 #define INVALID_PHASE 0x101 /* Re/Selection valid, but no REQ yet */ 202 #define PSEUDO_PHASE 0x100 /* "pseudo" bit */ 203
Indexes created Sun Sep 28 16:09:52 GMT 2025