/* $OpenBSD: ssh.c,v 1.14 2003/06/02 23:27:52 millert Exp $ */ /* * Copyright (c) 1994 Michael L. Hitch * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * Van Jacobson of Lawrence Berkeley Laboratory. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)ssh.c 7.5 (Berkeley) 5/4/91 */ /* * 53C710 scsi adaptor driver */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * SCSI delays * In u-seconds, primarily for state changes on the SPC. */ #define SCSI_CMD_WAIT 500000 /* wait per step of 'immediate' cmds */ #define SCSI_DATA_WAIT 500000 /* wait per data in/out step */ #define SCSI_INIT_WAIT 500000 /* wait per step (both) during init */ void ssh_select(struct ssh_softc *); void sshabort(struct ssh_softc *, ssh_regmap_p, char *); void ssherror(struct ssh_softc *, ssh_regmap_p, u_char); void sshstart(struct ssh_softc *); int ssh_checkintr(struct ssh_softc *, u_char, u_char, u_char, int *); void sshreset(struct ssh_softc *); void sshsetdelay(int); void ssh_scsidone(struct ssh_acb *, int); void ssh_sched(struct ssh_softc *); int ssh_poll(struct ssh_softc *, struct ssh_acb *); int sshintr(struct ssh_softc *); void scsi_period_to_ssh(struct ssh_softc *, int); void ssh_start(struct ssh_softc *, int, int, u_char *, int, u_char *, int); void ssh_dump_acb(struct ssh_acb *); void sshinitialize(struct ssh_softc *sc); /* 53C710 script */ const #include u_long scsi_nosync = 0; int shift_nosync; /* default to not inhibit sync negotiation on any drive */ u_char ssh_inhibit_sync[8] = { 0, 0, 0, 0, 0, 0, 0 }; /* initialize, so patchable */ u_char ssh_allow_disc[8] = {3, 3, 3, 3, 3, 3, 3, 3}; int ssh_no_dma = 0; int ssh_reset_delay = 250; /* delay after reset, in milleseconds */ int ssh_cmd_wait = SCSI_CMD_WAIT; int ssh_data_wait = SCSI_DATA_WAIT; int ssh_init_wait = SCSI_INIT_WAIT; #ifdef DEBUG_SYNC /* * sync period transfer lookup - only valid for 66MHz clock */ static struct { unsigned char p; /* period from sync request message */ unsigned char r; /* ssh_period << 4 | sbcl */ } sync_tab[] = { { 60/4, 0<<4 | 1}, { 76/4, 1<<4 | 1}, { 92/4, 2<<4 | 1}, { 92/4, 0<<4 | 2}, {108/4, 3<<4 | 1}, {116/4, 1<<4 | 2}, {120/4, 4<<4 | 1}, {120/4, 0<<4 | 3}, {136/4, 5<<4 | 1}, {140/4, 2<<4 | 2}, {152/4, 6<<4 | 1}, {152/4, 1<<4 | 3}, {164/4, 3<<4 | 2}, {168/4, 7<<4 | 1}, {180/4, 2<<4 | 3}, {184/4, 4<<4 | 2}, {208/4, 5<<4 | 2}, {212/4, 3<<4 | 3}, {232/4, 6<<4 | 2}, {240/4, 4<<4 | 3}, {256/4, 7<<4 | 2}, {272/4, 5<<4 | 3}, {300/4, 6<<4 | 3}, {332/4, 7<<4 | 3} }; #endif #ifdef DEBUG /* * 0x01 - full debug * 0x02 - DMA chaining * 0x04 - sshintr * 0x08 - phase mismatch * 0x10 - * 0x20 - panic on unhandled exceptions * 0x100 - disconnect/reselect */ int ssh_debug = 0; int sshsync_debug = 0; int sshdma_hits = 0; int sshdma_misses = 0; int sshchain_ints = 0; int sshstarts = 0; int sshints = 0; int sshphmm = 0; #define SSH_TRACE_SIZE 128 #define SSH_TRACE(a,b,c,d) \ ssh_trbuf[ssh_trix] = (a); \ ssh_trbuf[ssh_trix+1] = (b); \ ssh_trbuf[ssh_trix+2] = (c); \ ssh_trbuf[ssh_trix+3] = (d); \ ssh_trix = (ssh_trix + 4) & (SSH_TRACE_SIZE - 1); u_char ssh_trbuf[SSH_TRACE_SIZE]; int ssh_trix; void ssh_dump(struct ssh_softc *); void ssh_dump_trace(void); #else #define SSH_TRACE(a,b,c,d) #endif int kludge_city = 1; /* * dummy routine to debug while loops */ void wdummy(void); void wdummy(void) { static int wcount; wcount++; if (wcount > 400000) { wcount = 0; } } /* * default minphys routine for ssh based controllers */ void ssh_minphys(bp) struct buf *bp; { /* * No max transfer at this level. */ minphys(bp); } /* * used by specific ssh controller * */ int ssh_scsicmd(xs) struct scsi_xfer *xs; { struct ssh_acb *acb; struct ssh_softc *sc; struct scsi_link *slp; int flags, s; slp = xs->sc_link; sc = slp->adapter_softc; flags = xs->flags; xs->error = XS_NOERROR; /* XXXX ?? */ if (flags & SCSI_DATA_UIO) panic("ssh: scsi data uio requested"); /* XXXX ?? */ if (sc->sc_nexus && flags & SCSI_POLL) /* panic("ssh_scsicmd: busy");*/ printf("ssh_scsicmd: busy\n"); s = splbio(); acb = sc->free_list.tqh_first; if (acb) { TAILQ_REMOVE(&sc->free_list, acb, chain); } splx(s); if (acb == NULL) { xs->error = XS_DRIVER_STUFFUP; return(TRY_AGAIN_LATER); } acb->flags = ACB_ACTIVE; acb->xs = xs; bcopy(xs->cmd, &acb->cmd, xs->cmdlen); acb->clen = xs->cmdlen; acb->daddr = xs->data; acb->dleft = xs->datalen; /* * Since the 187 doesn't support cache snooping, we have * to flush the cache for a write and flush with inval for * a read, prior to starting the IO. * We should move this ssh_sched() XXX */ if (xs->flags & SCSI_DATA_IN) { /* read */ dma_cachectl((vm_offset_t)xs->data, xs->datalen, DMA_CACHE_SYNC_INVAL); } else { /* write */ dma_cachectl((vm_offset_t)xs->data, xs->datalen, DMA_CACHE_SYNC); } s = splbio(); TAILQ_INSERT_TAIL(&sc->ready_list, acb, chain); if (sc->sc_nexus == NULL) ssh_sched(sc); splx(s); if (flags & SCSI_POLL || ssh_no_dma) return(ssh_poll(sc, acb)); return(SUCCESSFULLY_QUEUED); } int ssh_poll(sc, acb) struct ssh_softc *sc; struct ssh_acb *acb; { ssh_regmap_p rp = sc->sc_sshp; struct scsi_xfer *xs = acb->xs; int i; int status; u_char istat; u_char dstat; u_char sstat0; int s; int to; s = splbio(); to = xs->timeout / 1000; if (sc->nexus_list.tqh_first) printf("%s: ssh_poll called with disconnected device\n", sc->sc_dev.dv_xname); for (;;) { /* use cmd_wait values? */ i = 50000; spl0(); while (((istat = rp->ssh_istat) & (SSH_ISTAT_SIP | SSH_ISTAT_DIP)) == 0) { if (--i <= 0) { #ifdef DEBUG printf ("waiting: tgt %d cmd %02x sbcl %02x dsp %x (+%x) dcmd %x ds %x timeout %d\n", xs->sc_link->target, acb->cmd.opcode, rp->ssh_sbcl, rp->ssh_dsp, rp->ssh_dsp - sc->sc_scriptspa, *((long *)&rp->ssh_dcmd), &acb->ds, acb->xs->timeout); #endif i = 50000; --to; if (to <= 0) { sshreset(sc); return(COMPLETE); } } delay(10); } sstat0 = rp->ssh_sstat0; delay(10); dstat = rp->ssh_dstat; if (ssh_checkintr(sc, istat, dstat, sstat0, &status)) { if (acb != sc->sc_nexus) printf("%s: ssh_poll disconnected device completed\n", sc->sc_dev.dv_xname); else if ((sc->sc_flags & SSH_INTDEFER) == 0) { sc->sc_flags &= ~SSH_INTSOFF; rp->ssh_sien = sc->sc_sien; rp->ssh_dien = sc->sc_dien; } ssh_scsidone(sc->sc_nexus, status); } if (xs->flags & ITSDONE) break; } splx(s); return (COMPLETE); } /* * start next command that's ready */ void ssh_sched(sc) struct ssh_softc *sc; { struct scsi_link *slp; struct ssh_acb *acb; int i; #ifdef DEBUG if (sc->sc_nexus) { printf("%s: ssh_sched- nexus %x/%d ready %x/%d\n", sc->sc_dev.dv_xname, sc->sc_nexus, sc->sc_nexus->xs->sc_link->target, sc->ready_list.tqh_first, sc->ready_list.tqh_first->xs->sc_link->target); return; } #endif for (acb = sc->ready_list.tqh_first; acb; acb = acb->chain.tqe_next) { slp = acb->xs->sc_link; i = slp->target; if(!(sc->sc_tinfo[i].lubusy & (1 << slp->lun))) { struct ssh_tinfo *ti = &sc->sc_tinfo[i]; TAILQ_REMOVE(&sc->ready_list, acb, chain); sc->sc_nexus = acb; slp = acb->xs->sc_link; ti = &sc->sc_tinfo[slp->target]; ti->lubusy |= (1 << slp->lun); break; } } if (acb == NULL) { #ifdef DEBUGXXX printf("%s: ssh_sched didn't find ready command\n", sc->sc_dev.dv_xname); #endif return; } if (acb->xs->flags & SCSI_RESET) sshreset(sc); #if 0 acb->cmd.bytes[0] |= slp->lun << 5; /* XXXX */ #endif ++sc->sc_active; ssh_select(sc); } void ssh_scsidone(acb, stat) struct ssh_acb *acb; int stat; { struct scsi_xfer *xs = acb->xs; struct scsi_link *slp = xs->sc_link; struct ssh_softc *sc = slp->adapter_softc; int dosched = 0; if (acb == NULL || (xs = acb->xs) == NULL) { #ifdef DIAGNOSTIC printf("ssh_scsidone: NULL acb or scsi_xfer\n"); #if defined(DEBUG) && defined(DDB) Debugger(); #endif #endif return; } slp = xs->sc_link; sc = slp->adapter_softc; /* * is this right? */ xs->status = stat; if (xs->error == XS_NOERROR && !(acb->flags & ACB_CHKSENSE)) { if (stat == SCSI_CHECK) { struct scsi_sense *ss = (void *)&acb->cmd; bzero(ss, sizeof(*ss)); ss->opcode = REQUEST_SENSE; ss->byte2 = slp->lun << 5; ss->length = sizeof(struct scsi_sense_data); acb->clen = sizeof(*ss); acb->daddr = (char *)&xs->sense; acb->dleft = sizeof(struct scsi_sense_data); acb->flags = ACB_ACTIVE | ACB_CHKSENSE; TAILQ_INSERT_HEAD(&sc->ready_list, acb, chain); --sc->sc_active; sc->sc_tinfo[slp->target].lubusy &= ~(1 << slp->lun); sc->sc_tinfo[slp->target].senses++; if (sc->sc_nexus == acb) { sc->sc_nexus = NULL; ssh_sched(sc); } SSH_TRACE('d','s',0,0) return; } } if (xs->error == XS_NOERROR && (acb->flags & ACB_CHKSENSE)) { xs->error = XS_SENSE; } else { xs->resid = 0; /* XXXX */ } #if whataboutthisone case SCSI_BUSY: xs->error = XS_BUSY; break; #endif xs->flags |= ITSDONE; /* * Remove the ACB from whatever queue it's on. We have to do a bit of * a hack to figure out which queue it's on. Note that it is *not* * necessary to cdr down the ready queue, but we must cdr down the * nexus queue and see if it's there, so we can mark the unit as no * longer busy. This code is sickening, but it works. */ if (acb == sc->sc_nexus) { sc->sc_nexus = NULL; sc->sc_tinfo[slp->target].lubusy &= ~(1<lun); if (sc->ready_list.tqh_first) dosched = 1; /* start next command */ --sc->sc_active; SSH_TRACE('d','a',stat,0) } else if (sc->ready_list.tqh_last == &acb->chain.tqe_next) { TAILQ_REMOVE(&sc->ready_list, acb, chain); SSH_TRACE('d','r',stat,0) } else { register struct ssh_acb *acb2; for (acb2 = sc->nexus_list.tqh_first; acb2; acb2 = acb2->chain.tqe_next) if (acb2 == acb) { TAILQ_REMOVE(&sc->nexus_list, acb, chain); sc->sc_tinfo[slp->target].lubusy &= ~(1<lun); --sc->sc_active; break; } if (acb2) ; else if (acb->chain.tqe_next) { TAILQ_REMOVE(&sc->ready_list, acb, chain); --sc->sc_active; } else { printf("%s: can't find matching acb\n", sc->sc_dev.dv_xname); #ifdef DDB /* Debugger(); */ #endif } SSH_TRACE('d','n',stat,0); } /* Put it on the free list. */ acb->flags = ACB_FREE; TAILQ_INSERT_HEAD(&sc->free_list, acb, chain); sc->sc_tinfo[slp->target].cmds++; scsi_done(xs); if (dosched && sc->sc_nexus == NULL) ssh_sched(sc); } void sshabort(sc, rp, where) register struct ssh_softc *sc; ssh_regmap_p rp; char *where; { #ifdef fix_this int i; #endif printf ("%s: abort %s: dstat %02x, sstat0 %02x sbcl %02x\n", sc->sc_dev.dv_xname, where, rp->ssh_dstat, rp->ssh_sstat0, rp->ssh_sbcl); if (sc->sc_active > 0) { #ifdef TODO SET_SBIC_cmd (rp, SBIC_CMD_ABORT); WAIT_CIP (rp); GET_SBIC_asr (rp, asr); if (asr & (SBIC_ASR_BSY|SBIC_ASR_LCI)) { /* ok, get more drastic.. */ SET_SBIC_cmd (rp, SBIC_CMD_RESET); delay(25); SBIC_WAIT(rp, SBIC_ASR_INT, 0); GET_SBIC_csr (rp, csr); /* clears interrupt also */ return; } do { SBIC_WAIT (rp, SBIC_ASR_INT, 0); GET_SBIC_csr (rp, csr); } while ((csr != SBIC_CSR_DISC) && (csr != SBIC_CSR_DISC_1) && (csr != SBIC_CSR_CMD_INVALID)); #endif /* lets just hope it worked.. */ #ifdef fix_this for (i = 0; i < 2; ++i) { if (sc->sc_iob[i].sc_xs && &sc->sc_iob[i] != sc->sc_cur) { printf ("sshabort: cleanup!\n"); sc->sc_iob[i].sc_xs = NULL; } } #endif /* fix_this */ /* sc->sc_active = 0; */ } } void sshinitialize(sc) struct ssh_softc *sc; { /* * Need to check that scripts is on a long word boundary * Also should verify that dev doesn't span non-contiguous * physical pages. */ sc->sc_scriptspa = kvtop((vm_offset_t)scripts); /* * malloc sc_acb to ensure that DS is on a long word boundary. */ MALLOC(sc->sc_acb, struct ssh_acb *, sizeof(struct ssh_acb) * SSH_NACB, M_DEVBUF, M_NOWAIT); if (sc->sc_acb == NULL) panic("sshinitialize: ACB malloc failed!"); sc->sc_tcp[1] = 1000 / sc->sc_clock_freq; sc->sc_tcp[2] = 1500 / sc->sc_clock_freq; sc->sc_tcp[3] = 2000 / sc->sc_clock_freq; sc->sc_minsync = sc->sc_tcp[1]; /* in 4ns units */ if (sc->sc_minsync < 25) sc->sc_minsync = 25; #if not_used if (sc->sc_clock_freq <= 25) sc->sc_tcp[0] = sc->sc_tcp[1]; else if (sc->sc_clock_freq <= 37) sc->sc_tcp[0] = sc->sc_tcp[2]; else if (sc->sc_clock_freq <= 50) sc->sc_tcp[0] = sc->sc_tcp[3]; else sc->sc_tcp[0] = 3000 / sc->sc_clock_freq; #endif sshreset (sc); } void sshreset(sc) struct ssh_softc *sc; { ssh_regmap_p rp; u_int i, s; u_char dummy; struct ssh_acb *acb; rp = sc->sc_sshp; if (sc->sc_flags & SSH_ALIVE) sshabort(sc, rp, "reset"); s = splbio(); /* * Reset the chip * XXX - is this really needed? */ rp->ssh_istat |= SSH_ISTAT_ABRT; /* abort current script */ rp->ssh_istat |= SSH_ISTAT_RST; /* reset chip */ rp->ssh_istat &= ~SSH_ISTAT_RST; /* * Reset SCSI bus (do we really want this?) */ rp->ssh_sien = 0; rp->ssh_scntl1 |= SSH_SCNTL1_RST; delay(25); rp->ssh_scntl1 &= ~SSH_SCNTL1_RST; /* * Set up various chip parameters */ rp->ssh_scntl0 = SSH_ARB_FULL | SSH_SCNTL0_EPC | SSH_SCNTL0_EPG; rp->ssh_scntl1 = SSH_SCNTL1_ESR; rp->ssh_dcntl = sc->sc_dcntl; rp->ssh_dmode = 0x80; /* burst length = 4 */ rp->ssh_sien = 0x00; /* don't enable interrupts yet */ rp->ssh_dien = 0x00; /* don't enable interrupts yet */ rp->ssh_scid = 1 << sc->sc_link.adapter_target; rp->ssh_dwt = 0x00; rp->ssh_ctest0 |= SSH_CTEST0_BTD | SSH_CTEST0_EAN; rp->ssh_ctest7 = sc->sc_ctest7; /* will need to re-negotiate sync xfers */ bzero(&sc->sc_sync, sizeof (sc->sc_sync)); i = rp->ssh_istat; if (i & SSH_ISTAT_SIP) dummy = rp->ssh_sstat0; delay(1); if (i & SSH_ISTAT_DIP) dummy = rp->ssh_dstat; splx (s); delay (ssh_reset_delay * 1000); printf(": version %d target %d\n", rp->ssh_ctest8 >> 4, sc->sc_link.adapter_target); if ((sc->sc_flags & SSH_ALIVE) == 0) { TAILQ_INIT(&sc->ready_list); TAILQ_INIT(&sc->nexus_list); TAILQ_INIT(&sc->free_list); sc->sc_nexus = NULL; acb = sc->sc_acb; bzero(acb, sizeof(struct ssh_acb) * SSH_NACB); for (i = 0; i < SSH_NACB; i++) { pmap_cache_ctrl(pmap_kernel(), trunc_page((vm_offset_t)acb), round_page((vm_offset_t)acb+sizeof(*acb)), CACHE_INH); TAILQ_INSERT_TAIL(&sc->free_list, acb, chain); acb++; } bzero(sc->sc_tinfo, sizeof(sc->sc_tinfo)); } else { if (sc->sc_nexus != NULL) { sc->sc_nexus->xs->error = XS_DRIVER_STUFFUP; ssh_scsidone(sc->sc_nexus, sc->sc_nexus->stat[0]); } while ((acb = sc->nexus_list.tqh_first) != NULL) { acb->xs->error = XS_DRIVER_STUFFUP; ssh_scsidone(acb, acb->stat[0]); } } sc->sc_flags |= SSH_ALIVE; sc->sc_flags &= ~(SSH_INTDEFER|SSH_INTSOFF); /* enable SCSI and DMA interrupts */ /* XXX turn on SEL interrupt? nivas */ sc->sc_sien = SSH_SIEN_M_A | SSH_SIEN_STO | /*SSH_SIEN_SEL |*/ SSH_SIEN_SGE | SSH_SIEN_UDC | SSH_SIEN_RST | SSH_SIEN_PAR; sc->sc_dien = SSH_DIEN_BF | SSH_DIEN_ABRT | SSH_DIEN_SIR | /*SSH_DIEN_WTD |*/ SSH_DIEN_IID; rp->ssh_sien = sc->sc_sien; rp->ssh_dien = sc->sc_dien; } /* * Setup Data Storage for 53C710 and start SCRIPTS processing */ void ssh_start (sc, target, lun, cbuf, clen, buf, len) struct ssh_softc *sc; int target; int lun; u_char *cbuf; int clen; u_char *buf; int len; { ssh_regmap_p rp = sc->sc_sshp; int nchain; int count, tcount; char *addr, *dmaend; struct ssh_acb *acb = sc->sc_nexus; #ifdef DEBUG if (ssh_debug & 0x100 && rp->ssh_sbcl & SSH_BSY) { printf ("ACK! ssh was busy: rp %x script %x dsa %x active %d\n", rp, &scripts, &acb->ds, sc->sc_active); printf ("istat %02x sfbr %02x lcrc %02x sien %02x dien %02x\n", rp->ssh_istat, rp->ssh_sfbr, rp->ssh_lcrc, rp->ssh_sien, rp->ssh_dien); #ifdef DDB /*Debugger();*/ #endif } #endif acb->msgout[0] = MSG_IDENTIFY | lun; if (ssh_allow_disc[target] & 2 || (ssh_allow_disc[target] && len == 0)) acb->msgout[0] = MSG_IDENTIFY_DR | lun; acb->status = 0; acb->stat[0] = -1; acb->msg[0] = -1; acb->ds.scsi_addr = (0x10000 << target) | (sc->sc_sync[target].sxfer << 8); acb->ds.idlen = 1; acb->ds.idbuf = (char *) kvtop((vm_offset_t)&acb->msgout[0]); acb->ds.cmdlen = clen; acb->ds.cmdbuf = (char *) kvtop((vm_offset_t)cbuf); acb->ds.stslen = 1; acb->ds.stsbuf = (char *) kvtop((vm_offset_t)&acb->stat[0]); acb->ds.msglen = 1; acb->ds.msgbuf = (char *) kvtop((vm_offset_t)&acb->msg[0]); acb->msg[1] = -1; acb->ds.msginlen = 1; acb->ds.extmsglen = 1; acb->ds.synmsglen = 3; acb->ds.msginbuf = (char *) kvtop((vm_offset_t)&acb->msg[1]); acb->ds.extmsgbuf = (char *) kvtop((vm_offset_t)&acb->msg[2]); acb->ds.synmsgbuf = (char *) kvtop((vm_offset_t)&acb->msg[3]); bzero(&acb->ds.chain, sizeof (acb->ds.chain)); if (sc->sc_sync[target].state == SYNC_START) { if (ssh_inhibit_sync[target]) { sc->sc_sync[target].state = SYNC_DONE; sc->sc_sync[target].sbcl = 0; sc->sc_sync[target].sxfer = 0; #ifdef DEBUG if (sshsync_debug) printf ("Forcing target %d asynchronous\n", target); #endif } else { acb->msg[2] = -1; acb->msgout[1] = MSG_EXT_MESSAGE; acb->msgout[2] = 3; acb->msgout[3] = MSG_SYNC_REQ; #ifdef MAXTOR_SYNC_KLUDGE acb->msgout[4] = 50 / 4; /* ask for ridiculous period */ #else acb->msgout[4] = sc->sc_minsync; #endif acb->msgout[5] = SSH_MAX_OFFSET; acb->ds.idlen = 6; sc->sc_sync[target].state = SYNC_SENT; #ifdef DEBUG if (sshsync_debug) printf ("Sending sync request to target %d\n", target); #endif } } /* * Build physical DMA addresses for scatter/gather I/O */ acb->iob_buf = buf; acb->iob_len = len; acb->iob_curbuf = acb->iob_curlen = 0; nchain = 0; count = len; addr = buf; dmaend = NULL; while (count > 0) { acb->ds.chain[nchain].databuf = (char *) kvtop((vm_offset_t)addr); if (count < (tcount = NBPG - ((int) addr & PGOFSET))) tcount = count; acb->ds.chain[nchain].datalen = tcount; addr += tcount; count -= tcount; if (acb->ds.chain[nchain].databuf == dmaend) { dmaend += acb->ds.chain[nchain].datalen; acb->ds.chain[nchain].datalen = 0; acb->ds.chain[--nchain].datalen += tcount; #ifdef DEBUG ++sshdma_hits; #endif } else { dmaend = acb->ds.chain[nchain].databuf + acb->ds.chain[nchain].datalen; acb->ds.chain[nchain].datalen = tcount; #ifdef DEBUG if (nchain) /* Don't count miss on first one */ ++sshdma_misses; #endif } ++nchain; } #ifdef DEBUG if (nchain != 1 && len != 0 && ssh_debug & 3) { int i; printf ("DMA chaining set: %d\n", nchain); for (i = 0; i < nchain; ++i) { printf (" [%d] %8x %4x\n", i, acb->ds.chain[i].databuf, acb->ds.chain[i].datalen); } } #endif #if CACHECTL /* push data cache for all data the 53c710 needs to access */ dma_cachectl(sc, sizeof (struct ssh_softc), DMA_CACHE_SYNC); dma_cachectl(acb, sizeof (*acb), DMA_CACHE_SYNC); #endif dma_cachectl((vm_offset_t)cbuf, clen, DMA_CACHE_SYNC); /* * Flushing the buf from data cache is very important for MVME187 * since the board does not snoop the local bus. * We have to flush the cache for a write and flush with inval for * a read. */ if (buf != NULL && len != 0) { if (acb->xs->flags & SCSI_DATA_IN) { /* read */ dma_cachectl((vm_offset_t)buf, len, DMA_CACHE_SYNC_INVAL); } else { /* write */ dma_cachectl((vm_offset_t)buf, len, DMA_CACHE_SYNC); } } #ifdef DEBUG if (ssh_debug & 0x100 && rp->ssh_sbcl & SSH_BSY) { printf ("ACK! ssh was busy at start: rp %x script %x dsa %x active %d\n", rp, &scripts, &acb->ds, sc->sc_active); #ifdef DDB /*Debugger();*/ #endif } #endif if (sc->nexus_list.tqh_first == NULL) { if (rp->ssh_istat & SSH_ISTAT_CON) printf("%s: ssh_select while connected?\n", sc->sc_dev.dv_xname); rp->ssh_temp = 0; rp->ssh_sbcl = sc->sc_sync[target].sbcl; rp->ssh_dsa = kvtop((vm_offset_t)&acb->ds); rp->ssh_dsp = sc->sc_scriptspa; SSH_TRACE('s',1,0,0) } else { /* * SSH is waiting for a reselect. If it is not * yet connected to the BUS, signal to change state. * Else, leave it alone - later on, the reselect interrupt * will take care of this request. */ if ((rp->ssh_istat & SSH_ISTAT_CON) == 0) { rp->ssh_istat = SSH_ISTAT_SIGP; SSH_TRACE('s',2,0,0); } else { SSH_TRACE('s',3,rp->ssh_istat,0); } } #ifdef DEBUG ++sshstarts; #endif } /* * Process a DMA or SCSI interrupt from the 53C710 SSH */ int ssh_checkintr(sc, istat, dstat, sstat0, status) struct ssh_softc *sc; u_char istat; u_char dstat; u_char sstat0; int *status; { ssh_regmap_p rp = sc->sc_sshp; struct ssh_acb *acb = sc->sc_nexus; int target = 0; int dfifo, dbc, sstat1; #ifdef DEBUG int dummy; #endif dfifo = rp->ssh_dfifo; dbc = rp->ssh_dbc0; sstat1 = rp->ssh_sstat1; /* * Flush DMA and SCSI FIFOs. */ rp->ssh_ctest8 |= SSH_CTEST8_CLF; while ((rp->ssh_ctest1 & SSH_CTEST1_FMT) != SSH_CTEST1_FMT){ wdummy(); } ; rp->ssh_ctest8 &= ~SSH_CTEST8_CLF; #ifdef DEBUG ++sshints; #if 0 if (ssh_debug & 0x100) { DCIAS(&acb->stat[0]); /* XXX */ printf ("sshchkintr: istat %x dstat %x sstat0 %x dsps %x sbcl %x sts %x msg %x\n", istat, dstat, sstat0, rp->ssh_dsps, rp->ssh_sbcl, acb->stat[0], acb->msg[0]); printf ("sync msg in: %02x %02x %02x %02x %02x %02x\n", acb->msg[0], acb->msg[1], acb->msg[2], acb->msg[3], acb->msg[4], acb->msg[5]); } #endif if (rp->ssh_dsp && (rp->ssh_dsp < sc->sc_scriptspa || rp->ssh_dsp >= sc->sc_scriptspa + sizeof(scripts))) { printf ("%s: dsp not within script dsp %x scripts %x:%x", sc->sc_dev.dv_xname, rp->ssh_dsp, sc->sc_scriptspa, sc->sc_scriptspa + sizeof(scripts)); printf(" istat %x dstat %x sstat0 %x\n", istat, dstat, sstat0); #ifdef DDB Debugger(); #endif } #endif SSH_TRACE('i',dstat,istat,(istat&SSH_ISTAT_DIP)?rp->ssh_dsps&0xff:sstat0); if (dstat & SSH_DSTAT_SIR && rp->ssh_dsps == 0xff00) { /* Normal completion status, or check condition */ #ifdef DEBUG if (rp->ssh_dsa != kvtop((vm_offset_t)&acb->ds)) { printf ("ssh: invalid dsa: %x %x\n", rp->ssh_dsa, kvtop((vm_offset_t)&acb->ds)); panic("*** ssh DSA invalid ***"); } #endif if (acb == NULL) { printf("%s: Command complete with no active command?\n", sc->sc_dev.dv_xname); return (0); } target = acb->xs->sc_link->target; if (sc->sc_sync[target].state == SYNC_SENT) { #ifdef DEBUG if (sshsync_debug) printf ("sync msg in: %02x %02x %02x %02x %02x %02x\n", acb->msg[0], acb->msg[1], acb->msg[2], acb->msg[3], acb->msg[4], acb->msg[5]); #endif if (acb->msg[1] == 0xff) printf ("%s: target %d ignored sync request\n", sc->sc_dev.dv_xname, target); else if (acb->msg[1] == MSG_REJECT) printf ("%s: target %d rejected sync request\n", sc->sc_dev.dv_xname, target); sc->sc_sync[target].state = SYNC_DONE; sc->sc_sync[target].sxfer = 0; sc->sc_sync[target].sbcl = 0; if (acb->msg[2] == 3 && acb->msg[3] == MSG_SYNC_REQ && acb->msg[5] != 0) { #ifdef MAXTOR_KLUDGE /* * Kludge for my Maxtor XT8580S * It accepts whatever we request, even * though it won't work. So we ask for * a short period than we can handle. If * the device says it can do it, use 208ns. * If the device says it can do less than * 100ns, then we limit it to 100ns. */ if (acb->msg[4] && acb->msg[4] < 100 / 4) { #ifdef DEBUG printf ("%d: target %d wanted %dns period\n", sc->sc_dev.dv_xname, target, acb->msg[4] * 4); #endif if (acb->msg[4] == 50 / 4) acb->msg[4] = 208 / 4; else acb->msg[4] = 100 / 4; } #endif /* MAXTOR_KLUDGE */ printf ("%s: target %d now synchronous, period=%dns, offset=%d\n", sc->sc_dev.dv_xname, target, acb->msg[4] * 4, acb->msg[5]); scsi_period_to_ssh (sc, target); } } #if CACHECTL /*cmmu_inval_cache(kvtop((vm_offset_t)&acb->stat[0]), 1);*/ dma_cachectl(&acb->stat[0], 1); #endif *status = acb->stat[0]; #ifdef DEBUG if (rp->ssh_sbcl & SSH_BSY) { /*printf ("ACK! ssh was busy at end: rp %x script %x dsa %x\n", rp, &scripts, &acb->ds);*/ #ifdef DDB /*Debugger();*/ #endif } if (acb->msg[0] != 0x00) printf("%s: message was not COMMAND COMPLETE: %x\n", sc->sc_dev.dv_xname, acb->msg[0]); #endif if (sc->nexus_list.tqh_first) rp->ssh_dcntl |= SSH_DCNTL_STD; return 1; } if (sstat0 & SSH_SSTAT0_M_A) { /* Phase mismatch */ #ifdef DEBUG ++sshphmm; if (acb == NULL) printf("%s: Phase mismatch with no active command?\n", sc->sc_dev.dv_xname); #endif if (acb->iob_len) { int adjust; adjust = ((dfifo - (dbc & 0x7f)) & 0x7f); if (sstat1 & SSH_SSTAT1_ORF) ++adjust; if (sstat1 & SSH_SSTAT1_OLF) ++adjust; acb->iob_curlen = *((long *)&rp->ssh_dcmd) & 0xffffff; acb->iob_curlen += adjust; acb->iob_curbuf = *((long *)&rp->ssh_dnad) - adjust; #ifdef DEBUG if (ssh_debug & 0x100) { int i; printf ("Phase mismatch: curbuf %x curlen %x dfifo %x dbc %x sstat1 %x adjust %x sbcl %x starts %d acb %x\n", acb->iob_curbuf, acb->iob_curlen, dfifo, dbc, sstat1, adjust, rp->ssh_sbcl, sshstarts, acb); if (acb->ds.chain[1].datalen) { for (i = 0; acb->ds.chain[i].datalen; ++i) printf("chain[%d] addr %x len %x\n", i, acb->ds.chain[i].databuf, acb->ds.chain[i].datalen); } } #endif #if 0 dma_cachectl (acb, sizeof(*acb), DMA_CACHE_SYNC)); #endif } #ifdef DEBUG SSH_TRACE('m',rp->ssh_sbcl,(rp->ssh_dsp>>8),rp->ssh_dsp); if (ssh_debug & 9) printf ("Phase mismatch: %x dsp +%x dcmd %x\n", rp->ssh_sbcl, rp->ssh_dsp - sc->sc_scriptspa, *((long *)&rp->ssh_dcmd)); #endif if ((rp->ssh_sbcl & SSH_REQ) == 0) { printf ("Phase mismatch: REQ not asserted! %02x dsp %x\n", rp->ssh_sbcl, rp->ssh_dsp); #ifdef DEBUG Debugger(); #endif } switch (rp->ssh_sbcl & 7) { case 0: /* data out */ case 1: /* data in */ case 2: /* status */ case 3: /* command */ case 6: /* message in */ case 7: /* message out */ rp->ssh_dsp = sc->sc_scriptspa + Ent_switch; break; default: goto bad_phase; } return 0; } if (sstat0 & SSH_SSTAT0_STO) { /* Select timed out */ #ifdef DEBUG if (acb == NULL) printf("%s: Select timeout with no active command?\n", sc->sc_dev.dv_xname); if (rp->ssh_sbcl & SSH_BSY) { printf ("ACK! ssh was busy at timeout: rp %x script %x dsa %x\n", rp, &scripts, &acb->ds); printf(" sbcl %x sdid %x istat %x dstat %x sstat0 %x\n", rp->ssh_sbcl, rp->ssh_sdid, istat, dstat, sstat0); if (!(rp->ssh_sbcl & SSH_BSY)) { printf ("Yikes, it's not busy now!\n"); #if 0 *status = -1; if (sc->nexus_list.tqh_first) rp->ssh_dsp = sc->sc_scriptspa + Ent_wait_reselect; return 1; #endif } /* rp->ssh_dcntl |= SSH_DCNTL_STD;*/ return (0); #ifdef DDB Debugger(); #endif } #endif *status = -1; acb->xs->error = XS_SELTIMEOUT; if (sc->nexus_list.tqh_first) rp->ssh_dsp = sc->sc_scriptspa + Ent_wait_reselect; return 1; } if (acb) target = acb->xs->sc_link->target; else target = 7; if (sstat0 & SSH_SSTAT0_UDC) { #ifdef DEBUG if (acb == NULL) printf("%s: Unexpected disconnect with no active command?\n", sc->sc_dev.dv_xname); printf ("%s: target %d disconnected unexpectedly\n", sc->sc_dev.dv_xname, target); #endif #if 0 sshabort (sc, rp, "sshchkintr"); #endif *status = STS_BUSY; if (sc->nexus_list.tqh_first) rp->ssh_dsp = sc->sc_scriptspa + Ent_wait_reselect; return 1; } if (dstat & SSH_DSTAT_SIR && (rp->ssh_dsps == 0xff01 || rp->ssh_dsps == 0xff02)) { #ifdef DEBUG if (ssh_debug & 0x100) printf ("%s: ID %02x disconnected TEMP %x (+%x) curbuf %x curlen %x buf %x len %x dfifo %x dbc %x sstat1 %x starts %d acb %x\n", sc->sc_dev.dv_xname, 1 << target, rp->ssh_temp, rp->ssh_temp ? rp->ssh_temp - sc->sc_scriptspa : 0, acb->iob_curbuf, acb->iob_curlen, acb->ds.chain[0].databuf, acb->ds.chain[0].datalen, dfifo, dbc, sstat1, sshstarts, acb); #endif if (acb == NULL) { printf("%s: Disconnect with no active command?\n", sc->sc_dev.dv_xname); return (0); } /* * XXXX need to update iob_curbuf/iob_curlen to reflect * current data transferred. If device disconnected in * the middle of a DMA block, they should already be set * by the phase change interrupt. If the disconnect * occurs on a DMA block boundary, we have to figure out * which DMA block it was. */ if (acb->iob_len && rp->ssh_temp) { int n = rp->ssh_temp - sc->sc_scriptspa; if (acb->iob_curlen && acb->iob_curlen != acb->ds.chain[0].datalen) printf("%s: iob_curbuf/len already set? n %x iob %x/%x chain[0] %x/%x\n", sc->sc_dev.dv_xname, n, acb->iob_curbuf, acb->iob_curlen, acb->ds.chain[0].databuf, acb->ds.chain[0].datalen); if (n < Ent_datain) n = (n - Ent_dataout) / 16; else n = (n - Ent_datain) / 16; if (n <= 0 && n > DMAMAXIO) printf("TEMP invalid %d\n", n); else { acb->iob_curbuf = (u_long)acb->ds.chain[n].databuf; acb->iob_curlen = acb->ds.chain[n].datalen; } #ifdef DEBUG if (ssh_debug & 0x100) { printf("%s: TEMP offset %d", sc->sc_dev.dv_xname, n); printf(" curbuf %x curlen %x\n", acb->iob_curbuf, acb->iob_curlen); } #endif } /* * If data transfer was interrupted by disconnect, iob_curbuf * and iob_curlen should reflect the point of interruption. * Adjust the DMA chain so that the data transfer begins * at the appropriate place upon reselection. * XXX This should only be done on save data pointer message? */ if (acb->iob_curlen) { int i, j; #ifdef DEBUG if (ssh_debug & 0x100) printf ("%s: adjusting DMA chain\n", sc->sc_dev.dv_xname); if (rp->ssh_dsps == 0xff02) printf ("%s: ID %02x disconnected without Save Data Pointers\n", sc->sc_dev.dv_xname, 1 << target); #endif for (i = 0; i < DMAMAXIO; ++i) { if (acb->ds.chain[i].datalen == 0) break; if (acb->iob_curbuf >= (long)acb->ds.chain[i].databuf && acb->iob_curbuf < (long)(acb->ds.chain[i].databuf + acb->ds.chain[i].datalen)) break; } if (i >= DMAMAXIO || acb->ds.chain[i].datalen == 0) printf("couldn't find saved data pointer\n"); #ifdef DEBUG if (ssh_debug & 0x100) printf(" chain[0]: %x/%x -> %x/%x\n", acb->ds.chain[0].databuf, acb->ds.chain[0].datalen, acb->iob_curbuf, acb->iob_curlen); #endif acb->ds.chain[0].databuf = (char *)acb->iob_curbuf; acb->ds.chain[0].datalen = acb->iob_curlen; for (j = 1, ++i; i < DMAMAXIO && acb->ds.chain[i].datalen; ++i, ++j) { #ifdef DEBUG if (ssh_debug & 0x100) printf(" chain[%d]: %x/%x -> %x/%x\n", j, acb->ds.chain[j].databuf, acb->ds.chain[j].datalen, acb->ds.chain[i].databuf, acb->ds.chain[i].datalen); #endif acb->ds.chain[j].databuf = acb->ds.chain[i].databuf; acb->ds.chain[j].datalen = acb->ds.chain[i].datalen; } if (j < DMAMAXIO) acb->ds.chain[j].datalen = 0; #if CACHECTL dma_cachectl(acb->ds.chain, sizeof(acb->ds.chain)); #endif } ++sc->sc_tinfo[target].dconns; /* * add nexus to waiting list * clear nexus * try to start another command for another target/lun */ acb->status = sc->sc_flags & SSH_INTSOFF; TAILQ_INSERT_HEAD(&sc->nexus_list, acb, chain); sc->sc_nexus = NULL; /* no current device */ /* start script to wait for reselect */ if (sc->sc_nexus == NULL) rp->ssh_dsp = sc->sc_scriptspa + Ent_wait_reselect; /* XXXX start another command ? */ if (sc->ready_list.tqh_first) ssh_sched(sc); return (0); } if (dstat & SSH_DSTAT_SIR && rp->ssh_dsps == 0xff03) { int reselid = rp->ssh_scratch & 0x7f; int reselun = rp->ssh_sfbr & 0x07; sc->sc_sstat1 = rp->ssh_sbcl; /* XXXX save current SBCL */ #ifdef DEBUG if (ssh_debug & 0x100) printf ("%s: target ID %02x reselected dsps %x\n", sc->sc_dev.dv_xname, reselid, rp->ssh_dsps); if ((rp->ssh_sfbr & 0x80) == 0) printf("%s: Reselect message in was not identify: %x\n", sc->sc_dev.dv_xname, rp->ssh_sfbr); #endif /* * If we were trying to start a command when the reselect * occurred, need to put it at the head of the ready list, * mark target/lun unbusy and decrement sc_active count. */ if (sc->sc_nexus) { #ifdef DEBUG if (ssh_debug & 0x100) printf ("%s: reselect ID %02x w/active\n", sc->sc_dev.dv_xname, reselid); #endif TAILQ_INSERT_HEAD(&sc->ready_list, sc->sc_nexus, chain); sc->sc_tinfo[sc->sc_nexus->xs->sc_link->target].lubusy &= ~(1 << sc->sc_nexus->xs->sc_link->lun); --sc->sc_active; } /* * locate acb of reselecting device * set sc->sc_nexus to acb */ for (acb = sc->nexus_list.tqh_first; acb; acb = acb->chain.tqe_next) { if (reselid != (acb->ds.scsi_addr >> 16) || reselun != (acb->msgout[0] & 0x07)) continue; TAILQ_REMOVE(&sc->nexus_list, acb, chain); sc->sc_nexus = acb; sc->sc_flags |= acb->status; acb->status = 0; #if CACHECTL dma_cachectl(&acb->stat[0], sizeof(acb->stat[0])); #endif rp->ssh_dsa = kvtop((vm_offset_t)&acb->ds); rp->ssh_sxfer = sc->sc_sync[acb->xs->sc_link->target].sxfer; rp->ssh_sbcl = sc->sc_sync[acb->xs->sc_link->target].sbcl; break; } if (acb == NULL) { printf("%s: target ID %02x reselect nexus_list %x\n", sc->sc_dev.dv_xname, reselid, sc->nexus_list.tqh_first); panic("unable to find reselecting device"); } #if CACHECTL dma_cachectl (acb, sizeof(*acb)); #endif rp->ssh_temp = 0; rp->ssh_dcntl |= SSH_DCNTL_STD; return (0); } if (dstat & SSH_DSTAT_SIR && rp->ssh_dsps == 0xff04) { #ifdef DEBUG u_short ctest2 = rp->ssh_ctest2; #endif /* reselect was interrupted (by Sig_P or select) */ #ifdef DEBUG if (ssh_debug & 0x100 || (ctest2 & SSH_CTEST2_SIGP) == 0) printf ("%s: reselect interrupted (Sig_P?) scntl1 %x ctest2 %x sfbr %x istat %x/%x\n", sc->sc_dev.dv_xname, rp->ssh_scntl1, ctest2, rp->ssh_sfbr, istat, rp->ssh_istat); #endif /* XXX assumes it was not select */ if (sc->sc_nexus == NULL) { printf("%s: reselect interrupted, sc_nexus == NULL\n", sc->sc_dev.dv_xname); #if 0 ssh_dump(sc); #ifdef DDB Debugger(); #endif #endif rp->ssh_dcntl |= SSH_DCNTL_STD; return(0); } target = sc->sc_nexus->xs->sc_link->target; rp->ssh_temp = 0; rp->ssh_dsa = kvtop((vm_offset_t)&sc->sc_nexus->ds); rp->ssh_sxfer = sc->sc_sync[target].sxfer; rp->ssh_sbcl = sc->sc_sync[target].sbcl; rp->ssh_dsp = sc->sc_scriptspa; return (0); } if (dstat & SSH_DSTAT_SIR && rp->ssh_dsps == 0xff06) { if (acb == NULL) printf("%s: Bad message-in with no active command?\n", sc->sc_dev.dv_xname); /* Unrecognized message in byte */ #if CACHECTL /*cmmu_inval_cache(kvtop((vm_offset_t)&acb->msg[1]), 1);*/ dma_cachectl (&acb->msg[1],1); #endif printf ("%s: Unrecognized message in data sfbr %x msg %x sbcl %x\n", sc->sc_dev.dv_xname, rp->ssh_sfbr, acb->msg[1], rp->ssh_sbcl); /* what should be done here? */ /*DCIAS(kvtop((vm_offset_t)&acb->msg[1]));*/ rp->ssh_dsp = sc->sc_scriptspa + Ent_switch; return (0); } if (dstat & SSH_DSTAT_SIR && rp->ssh_dsps == 0xff0a) { /* Status phase wasn't followed by message in phase? */ printf ("%s: Status phase not followed by message in phase? sbcl %x sbdl %x\n", sc->sc_dev.dv_xname, rp->ssh_sbcl, rp->ssh_sbdl); if (rp->ssh_sbcl == 0xa7) { /* It is now, just continue the script? */ rp->ssh_dcntl |= SSH_DCNTL_STD; return (0); } sshreset (sc); *status = -1; return 0; /* sshreset has cleaned up */ } if (sstat0 & SSH_SSTAT0_M_A) { /* Phase mismatch */ #ifdef DEBUG printf("%s: Phase mismatch - expecting %x got %x\n", sc->sc_dev.dv_xname, rp->ssh_dcmd & 0x07, rp->ssh_sstat2 & 0x07); ++sshphmm; #endif if (acb == NULL) { printf("%s: Phase mismatch with no active command- expecting %x got %x\n", sc->sc_dev.dv_xname, *((long *)&rp->ssh_dcmd) & 0x07000000, rp->ssh_sstat2 & 0x07); goto bad_phase; } if (acb->iob_len) { int adjust; adjust = ((dfifo - (dbc & 0x7f)) & 0x7f); if (sstat1 & SSH_SSTAT1_ORF) ++adjust; if (sstat1 & SSH_SSTAT1_OLF) ++adjust; /* XXX what's with this ssh_dcmd here? nivas */ acb->iob_curlen = *((long *)&rp->ssh_dcmd) & 0xffffff; acb->iob_curlen += adjust; acb->iob_curbuf = *((long *)&rp->ssh_dnad) - adjust; #ifdef DEBUG if (ssh_debug & 0x100) { int i; printf ("Phase mismatch: curbuf %lx curlen %lx dfifo %x dbc %x sstat1 %x adjust %x sbcl %x starts %d acb %p\n", acb->iob_curbuf, acb->iob_curlen, dfifo, dbc, sstat1, adjust, rp->ssh_sbcl, sshstarts, acb); if (acb->ds.chain[1].datalen) { for (i = 0; acb->ds.chain[i].datalen; ++i) printf("chain[%d] addr %p len %lx\n", i, acb->ds.chain[i].databuf, acb->ds.chain[i].datalen); } } #endif #if 0 dma_cachectl(acb, sizeof(*acb), DMA_CACHE_SYNC); #endif } #ifdef DEBUG SSH_TRACE('m',rp->ssh_sbcl,(rp->ssh_dsp>>8),rp->ssh_dsp); if (ssh_debug & 9) printf ("Phase mismatch: %x dsp +%lx dcmd %lx\n", rp->ssh_sbcl, rp->ssh_dsp - sc->sc_scriptspa, *((long *)&rp->ssh_dcmd)); #endif if ((rp->ssh_sbcl & SSH_REQ) == 0) { printf ("Phase mismatch: REQ not asserted! %02x dsp %lx\n", rp->ssh_sbcl, rp->ssh_dsp); #if defined(DEBUG) && defined(DDB) Debugger(); #endif goto bad_phase; } #if XXX switch (rp->ssh_sbcl & 7) #endif switch (rp->ssh_sstat2 & 7) { case 0: /* data out */ case 1: /* data in */ case 2: /* command */ case 3: /* status */ case 6: /* message out */ case 7: /* message in */ rp->ssh_dsp = sc->sc_scriptspa + Ent_switch; break; default: goto bad_phase; } return 0; } if (sstat0 & SSH_SSTAT0_STO) { /* SCSI bus time out */ if (acb == NULL) { printf("%s: SCSI bus timeout with no active command?\n", sc->sc_dev.dv_xname); /*Debugger();*/ } printf ("STO: scripts %x dsp %x dcmd %x dsps %x\n", sc->sc_scriptspa, rp->ssh_dsp, *((long *)&rp->ssh_dcmd), rp->ssh_dsps); if ((istat & SSH_ISTAT_CON) == 0) { printf("selection of %x timeout\n", rp->ssh_sdid); } else if ((rp->ssh_ctest0 & SSH_CTEST0_BTD) == 0) { printf("No SCSI activity for 250ms(ctest0 %x %x dsps %x)\n", rp->ssh_ctest0, rp->ssh_ctest0, rp->ssh_dsps); } else { printf("Waited > 250ms for disconnect\n"); } #ifdef DEBUG printf ("scripts %x dsp %x dcmd %x\n", sc->sc_scriptspa, rp->ssh_dsp, *((long *)&rp->ssh_dcmd)); printf("msg %x status %x\n", acb->msg[0], acb->stat[0]); if (rp->ssh_sbcl & SSH_BSY) { printf ("ACK! ssh was busy at timeout: rp %p script %p dsa %p\n", rp, &scripts, &acb->ds); printf(" sbcl %x sdid %x istat %x dstat %x sstat0 %x\n", rp->ssh_sbcl, rp->ssh_sdid, istat, dstat, sstat0); if (!(rp->ssh_sbcl & SSH_BSY)) { printf ("Yikes, it's not busy now!\n"); #if 0 *status = -1; if (sc->nexus_list.tqh_first) rp->ssh_dsp = sc->sc_scriptspa + Ent_wait_reselect; return 1; #endif } /* * I am not sure if DCNTL_STD can be used to restart. * The manual discusses this bit only for manual start * mode and single step mode, which we are not using. * I will give it a shot... nivas */ if (kludge_city) { dummy = rp->ssh_dsp; rp->ssh_dsp = dummy; } else { rp->ssh_dcntl |= SSH_DCNTL_STD; } return (0); #ifdef DDB Debugger(); #endif } #endif if (rp->ssh_sbcl & SSH_BSY) { if (!(rp->ssh_sbcl & SSH_BSY)) { printf ("Yikes, it's not busy now!\n"); *status = -1; if (sc->nexus_list.tqh_first) rp->ssh_dsp = sc->sc_scriptspa + Ent_wait_reselect; return 1; } rp->ssh_dcntl |= SSH_DCNTL_STD; return 0; } *status = -1; if (acb) acb->xs->error = XS_SELTIMEOUT; if (sc->nexus_list.tqh_first) rp->ssh_dsp = sc->sc_scriptspa + Ent_wait_reselect; return 1; } if (acb) target = acb->xs->sc_link->target; else target = 7; if (sstat0 & SSH_SSTAT0_UDC) { #ifdef DEBUG if (acb == NULL) printf("%s: Unexpected disconnect with no active command?\n", sc->sc_dev.dv_xname); printf ("%s: target %d disconnected unexpectedly\n", sc->sc_dev.dv_xname, target); #endif #if 0 sshabort (sc, rp, "sshchkintr"); #endif *status = STS_BUSY; if (sc->nexus_list.tqh_first) rp->ssh_dsp = sc->sc_scriptspa + Ent_wait_reselect; return (acb != NULL); } if (sstat0 == 0 && dstat & SSH_DSTAT_SIR) { #if CACHECTL /*cmmu_inval_cache(kvtop((vm_offset_t)&acb->stat[0]), 1); */ /*cmmu_inval_cache(kvtop((vm_offset_t)&acb->msg[0]), 1); */ dma_cachectl (&acb->stat[0], 1); dma_cachectl (&acb->msg[0], 1); #endif printf ("SSH interrupt: %lx sts %x msg %x %x sbcl %x\n", rp->ssh_dsps, acb->stat[0], acb->msg[0], acb->msg[1], rp->ssh_sbcl); sshreset (sc); *status = -1; return 0; /* sshreset has cleaned up */ } if (sstat0 & SSH_SSTAT0_SGE) printf ("SSH: SCSI Gross Error\n"); if (sstat0 & SSH_SSTAT0_PAR) printf ("SSH: Parity Error\n"); if (dstat & SSH_DSTAT_IID) { printf ("SSH: Illegal instruction detected (dsp %x dcmd %x dsps %x)\n", rp->ssh_dsp, *((long *)&rp->ssh_dcmd), rp->ssh_dsps); if ((*((long *)&rp->ssh_dcmd) & 0xf8000000) == 0x48000000) { /* wait disconnect */ printf("SSH was executing wait disconnect\n"); } } bad_phase: #if XXX /* * temporary panic for unhandled conditions * displays various things about the 53C710 status and registers * then panics. * XXXX need to clean this up to print out the info, reset, and continue */ printf ("sshchkintr: target %x ds %x\n", target, &acb->ds); printf ("scripts %x ds %x rp %x dsp %x dcmd %x\n", sc->sc_scriptspa, kvtop((vm_offset_t)&acb->ds), kvtop((vm_offset_t)rp), rp->ssh_dsp, *((long *)&rp->ssh_dcmd)); printf ("sshchkintr: istat %x dstat %x sstat0 %x dsps %x " "dsa %x sbcl %x sts %x msg %x %x sfbr %x\n", istat, dstat, sstat0, rp->ssh_dsps, rp->ssh_dsa, rp->ssh_sbcl, acb->stat[0], acb->msg[0], acb->msg[1], rp->ssh_sfbr); #ifdef DEBUG if (ssh_debug & 0x20) panic("sshchkintr: **** temp ****"); #ifdef DDB /* Debugger(); */ #endif #endif #endif /* XXX */ sshreset (sc); /* hard reset */ *status = -1; return 0; /* sshreset cleaned up */ } void ssh_select(sc) struct ssh_softc *sc; { ssh_regmap_p rp; struct ssh_acb *acb = sc->sc_nexus; #ifdef DEBUG if (ssh_debug & 1) printf ("%s: select ", sc->sc_dev.dv_xname); #endif rp = sc->sc_sshp; if (acb->xs->flags & SCSI_POLL || ssh_no_dma) { sc->sc_flags |= SSH_INTSOFF; sc->sc_flags &= ~SSH_INTDEFER; if ((rp->ssh_istat & 0x08) == 0) { rp->ssh_sien = 0; rp->ssh_dien = 0; } #if 0 } else if ((sc->sc_flags & SSH_INTDEFER) == 0) { sc->sc_flags &= ~SSH_INTSOFF; if ((rp->ssh_istat & 0x08) == 0) { rp->ssh_sien = sc->sc_sien; rp->ssh_dien = sc->sc_dien; } #endif } #ifdef DEBUG if (ssh_debug & 1) printf ("ssh_select: target %x cmd %02x ds %x\n", acb->xs->sc_link->target, acb->cmd.opcode, &sc->sc_nexus->ds); #endif ssh_start(sc, acb->xs->sc_link->target, acb->xs->sc_link->lun, (u_char *)&acb->cmd, acb->clen, acb->daddr, acb->dleft); return; } /* * 53C710 interrupt handler */ int sshintr (sc) register struct ssh_softc *sc; { ssh_regmap_p rp; register u_char istat, dstat, sstat0; int status; int s = splbio(); istat = sc->sc_istat; if ((istat & (SSH_ISTAT_SIP | SSH_ISTAT_DIP)) == 0) { /* is this possible? we won't come here if there is not int!!! XXX */ splx(s); return (0); } /* Got a valid interrupt on this device */ rp = sc->sc_sshp; dstat = sc->sc_dstat; sstat0 = sc->sc_sstat0; if (dstat & SSH_DSTAT_SIR) sc->sc_intcode = rp->ssh_dsps; /* XXX use sc_intcode instead of dsps */ /* Clear the copies in sc */ sc->sc_istat = 0; sc->sc_dstat = 0; sc->sc_sstat0 = 0; #ifdef DEBUG if (ssh_debug & 1) printf ("%s: intr istat %x dstat %x sstat0 %x\n", sc->sc_dev.dv_xname, istat, dstat, sstat0); if (!sc->sc_active) { printf ("%s: spurious interrupt? istat %x dstat %x sstat0 %x status %x\n", sc->sc_dev.dv_xname, istat, dstat, sstat0, sc->sc_nexus->stat[0]); } #endif #ifdef DEBUG if (ssh_debug & 5) { #if CACHECTL /*cmmu_inval_cache(kvtop((vm_offset_t)&sc->sc_nexus->stat[0]), sizeof(sc->sc_nexus->stat[0])); */ dma_cachectl(&sc->sc_nexus->stat[0], sizeof(sc->sc_nexus->stat[0])); #endif printf ("%s: intr istat %x dstat %x sstat0 %x dsps %x sbcl %x sts %x msg %x\n", sc->sc_dev.dv_xname, istat, dstat, sstat0, rp->ssh_dsps, rp->ssh_sbcl, sc->sc_nexus->stat[0], sc->sc_nexus->msg[0]); } #endif if (sc->sc_flags & SSH_INTDEFER) { sc->sc_flags &= ~(SSH_INTDEFER | SSH_INTSOFF); rp->ssh_sien = sc->sc_sien; rp->ssh_dien = sc->sc_dien; } if (ssh_checkintr (sc, istat, dstat, sstat0, &status)) { #if 1 if (status == 0xff) printf ("sshintr: status == 0xff\n"); #endif if ((sc->sc_flags & (SSH_INTSOFF | SSH_INTDEFER)) != SSH_INTSOFF) { #if 0 if (rp->ssh_sbcl & SSH_BSY) { printf ("%s: SCSI bus busy at completion", sc->sc_dev.dv_xname); printf(" targ %d sbcl %02x sfbr %x lcrc %02x dsp +%x\n", sc->sc_nexus->xs->sc_link->target, rp->ssh_sbcl, rp->ssh_sfbr, rp->ssh_lcrc, rp->ssh_dsp - sc->sc_scriptspa); } #endif ssh_scsidone(sc->sc_nexus, sc->sc_nexus->stat[0]); } } splx(s); return (1); } /* * This is based on the Progressive Peripherals 33MHz Zeus driver and will * not be correct for other 53c710 boards. * XXX fix this - nivas */ void scsi_period_to_ssh (sc, target) struct ssh_softc *sc; int target; { int period, offset, sxfer, sbcl = 0; #ifdef DEBUG_SYNC int i; #endif period = sc->sc_nexus->msg[4]; offset = sc->sc_nexus->msg[5]; #ifdef DEBUG_SYNC sxfer = 0; if (offset <= SSH_MAX_OFFSET) sxfer = offset; for (i = 0; i < sizeof (sync_tab) / 2; ++i) { if (period <= sync_tab[i].p) { sxfer |= sync_tab[i].r & 0x70; sbcl = sync_tab[i].r & 0x03; break; } } printf ("ssh sync old: ssh_sxfr %02x, ssh_sbcl %02x\n", sxfer, sbcl); #endif for (sbcl = 1; sbcl < 4; ++sbcl) { sxfer = (period * 4 - 1) / sc->sc_tcp[sbcl] - 3; if (sxfer >= 0 && sxfer <= 7) break; } if (sbcl > 3) { printf("ssh_sync: unable to compute sync params for period %dns\n", period * 4); /* * XXX need to pick a value we can do and renegotiate */ sxfer = sbcl = 0; } else { sxfer = (sxfer << 4) | ((offset <= SSH_MAX_OFFSET) ? offset : SSH_MAX_OFFSET); #ifdef DEBUG_SYNC printf("ssh sync: params for period %dns: sxfer %x sbcl %x", period * 4, sxfer, sbcl); printf(" actual period %dns\n", sc->sc_tcp[sbcl] * ((sxfer >> 4) + 4)); #endif } sc->sc_sync[target].sxfer = sxfer; sc->sc_sync[target].sbcl = sbcl; #ifdef DEBUG_SYNC printf ("ssh sync: ssh_sxfr %02x, ssh_sbcl %02x\n", sxfer, sbcl); #endif } #ifdef DEBUG #if SSH_TRACE_SIZE void ssh_dump_trace() { int i; printf("ssh trace: next index %d\n", ssh_trix); i = ssh_trix; do { printf("%3d: '%c' %02x %02x %02x\n", i, ssh_trbuf[i], ssh_trbuf[i + 1], ssh_trbuf[i + 2], ssh_trbuf[i + 3]); i = (i + 4) & (SSH_TRACE_SIZE - 1); } while (i != ssh_trix); } #endif void ssh_dump_acb(acb) struct ssh_acb *acb; { u_char *b = (u_char *) &acb->cmd; int i; printf("acb@%p ", acb); if (acb->xs == NULL) { printf("\n"); return; } printf("(%d:%d) flags %2x clen %2d cmd ", acb->xs->sc_link->target, acb->xs->sc_link->lun, acb->flags, acb->clen); for (i = acb->clen; i; --i) printf(" %02x", *b++); printf("\n"); printf(" xs: %08x data %8x:%04x ", acb->xs, acb->xs->data, acb->xs->datalen); printf("va %8x:%04x ", acb->iob_buf, acb->iob_len); printf("cur %8x:%04x\n", acb->iob_curbuf, acb->iob_curlen); } void ssh_dump(sc) struct ssh_softc *sc; { struct ssh_acb *acb; ssh_regmap_p rp = sc->sc_sshp; int s; int i; s = splbio(); #if SSH_TRACE_SIZE ssh_dump_trace(); #endif printf("%s@%p regs %p istat %x\n", sc->sc_dev.dv_xname, sc, rp, rp->ssh_istat); if (acb = sc->free_list.tqh_first) { printf("Free list:\n"); while (acb) { ssh_dump_acb(acb); acb = acb->chain.tqe_next; } } if (acb = sc->ready_list.tqh_first) { printf("Ready list:\n"); while (acb) { ssh_dump_acb(acb); acb = acb->chain.tqe_next; } } if (acb = sc->nexus_list.tqh_first) { printf("Nexus list:\n"); while (acb) { ssh_dump_acb(acb); acb = acb->chain.tqe_next; } } if (sc->sc_nexus) { printf("Nexus:\n"); ssh_dump_acb(sc->sc_nexus); } for (i = 0; i < 8; ++i) { if (sc->sc_tinfo[i].cmds > 2) { printf("tgt %d: cmds %d disc %d senses %d lubusy %x\n", i, sc->sc_tinfo[i].cmds, sc->sc_tinfo[i].dconns, sc->sc_tinfo[i].senses, sc->sc_tinfo[i].lubusy); } } splx(s); } #endif