1 /* $NetBSD: mhavar.h,v 1.5 2001/04/25 17:53:26 bouyer 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 void *sc_iobase; 90 volatile u_char *sc_pc; 91 volatile u_short *sc_ps; 92 volatile u_char *sc_pcx; 93 94 struct scsipi_channel sc_channel; 95 struct scsipi_adapter sc_adapter; 96 97 TAILQ_HEAD(, acb) free_list, ready_list, nexus_list; 98 struct acb *sc_nexus; /* current command */ 99 struct acb sc_acb[8]; /* one per target */ 100 struct spc_tinfo sc_tinfo[8]; 101 102 /* Data about the current nexus (updated for every cmd switch) */ 103 u_char *sc_dp; /* Current data pointer */ 104 size_t sc_dleft; /* Data bytes left to transfer */ 105 106 u_char *sc_cp; /* Current command pointer */ 107 size_t sc_cleft; /* Command bytes left to transfer */ 108 109 /* Adapter state */ 110 int sc_phase; /* Copy of what bus phase we are in */ 111 int sc_prevphase; /* Copy of what bus phase we were in */ 112 u_char sc_state; /* State applicable to the adapter */ 113 u_char sc_flags; 114 u_char sc_selid; /* Reselection ID */ 115 volatile u_char sc_spcinitialized; /* */ 116 117 /* Message stuff */ 118 u_char sc_msgpriq; /* Messages we want to send */ 119 u_char sc_msgout; /* What message is on its way out? */ 120 u_char sc_msgoutq; /* Messages sent during last MESSAGE OUT */ 121 u_char sc_lastmsg; /* Message last transmitted */ 122 u_char sc_currmsg; /* Message currently ready to transmit */ 123 #define SPC_MAX_MSG_LEN 8 124 u_char sc_omess[SPC_MAX_MSG_LEN]; 125 u_char *sc_omp; /* Outgoing message pointer */ 126 u_char sc_imess[SPC_MAX_MSG_LEN]; 127 u_char *sc_imp; /* Incoming message pointer */ 128 size_t sc_imlen; 129 130 /* Hardware stuff */ 131 int sc_freq; /* Clock frequency in MHz */ 132 int sc_id; /* our scsi id */ 133 int sc_minsync; /* Minimum sync period / 4 */ 134 int sc_maxsync; /* Maximum sync period / 4 */ 135 136 /* DMA buffer */ 137 bus_dma_tag_t sc_dmat; 138 bus_dma_segment_t sc_dmaseg[1]; 139 int sc_ndmasegs; 140 bus_dmamap_t sc_dmamap; 141 caddr_t sc_dmabuf; 142 u_char *sc_p; 143 u_int32_t sc_dmasize; 144 }; 145 146 /* values for sc_state */ 147 #define SPC_INIT 0x00 148 #define SPC_IDLE 0x01 /* waiting for something to do */ 149 #define ESP_TMP_UNAVAIL 0x02 /* Don't accept SCSI commands */ 150 #define SPC_SELECTING 0x03 /* SCSI command is arbiting */ 151 #define SPC_RESELECTED 0x04 /* Has been reselected */ 152 #define SPC_HASNEXUS 0x05 /* Actively using the SCSI bus */ 153 #define SPC_CLEANING 0x06 154 #define ESP_SBR 0x07 /* Expect a SCSI RST because we commanded it */ 155 #define SPC_CONNECTED 0x08 /* Actively using the SCSI bus */ 156 #define SPC_DISCONNECT 0x09 /* MSG_DISCONNECT received */ 157 #define SPC_CMDCOMPLETE 0x0a /* MSG_CMDCOMPLETE received */ 158 159 160 /* values for sc_flags */ 161 #define SPC_DROP_MSGI 0x01 /* Discard all msgs (parity err detected) */ 162 #define SPC_DOINGDMA 0x02 /* The FIFO data path is active! */ 163 #define SPC_BUSFREE_OK 0x04 /* Bus free phase is OK. */ 164 #define SPC_SYNCHNEGO 0x08 /* Synch negotiation in progress. */ 165 #define SPC_DISCON 0x10 /* Target sent DISCONNECT msg */ 166 #define SPC_ABORTING 0x20 /* Bailing out */ 167 #define ESP_ICCS 0x40 /* Expect status phase results */ 168 #define ESP_WAITI 0x80 /* Waiting for non-DMA data to arrive */ 169 170 171 /* values for sc_msgout */ 172 #define SEND_DEV_RESET 0x01 173 #define SEND_PARITY_ERROR 0x02 174 #define SEND_INIT_DET_ERR 0x04 175 #define SEND_REJECT 0x08 176 #define SEND_IDENTIFY 0x10 177 #define SEND_ABORT 0x20 178 #define SEND_SDTR 0x40 179 #define SEND_WDTR 0x80 180 181 /* SCSI Status codes */ 182 #define ST_GOOD 0x00 183 #define ST_CHKCOND 0x02 184 #define ST_CONDMET 0x04 185 #define ST_BUSY 0x08 186 #define ST_INTERMED 0x10 187 #define ST_INTERMED_CONDMET 0x14 188 #define ST_RESERVATION_CONFLICT 0x18 189 #define ST_CMD_TERM 0x22 190 #define ST_QUEUE_FULL 0x28 191 192 #define ST_MASK 0x3e /* bit 0,6,7 is reserved */ 193 194 /* phase bits */ 195 #define IOI 0x01 196 #define CDI 0x02 197 #define MSGI 0x04 198 199 /* Information transfer phases */ 200 #define DATA_OUT_PHASE (0) 201 #define DATA_IN_PHASE (IOI) 202 #define COMMAND_PHASE (CDI) 203 #define STATUS_PHASE (CDI|IOI) 204 #define MESSAGE_OUT_PHASE (MSGI|CDI) 205 #define MESSAGE_IN_PHASE (MSGI|CDI|IOI) 206 207 #define PHASE_MASK (MSGI|CDI|IOI) 208 209 /* Some pseudo phases for getphase()*/ 210 #define BUSFREE_PHASE 0x100 /* Re/Selection no longer valid */ 211 #define INVALID_PHASE 0x101 /* Re/Selection valid, but no REQ yet */ 212 #define PSEUDO_PHASE 0x100 /* "pseudo" bit */ 213