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diff --git a/sys/arch/mvme88k/dev/siop.c b/sys/arch/mvme88k/dev/siop.c
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+/* $NetBSD: siop.c,v 1.23 1995/08/18 15:28:08 chopps 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. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. 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.
+ *
+ * @(#)siop.c 7.5 (Berkeley) 5/4/91
+ */
+
+/*
+ * 53C710 scsi adaptor driver
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+#include <sys/disklabel.h>
+#include <sys/dkstat.h>
+#include <sys/buf.h>
+#include <sys/malloc.h>
+#include <scsi/scsi_all.h>
+#include <scsi/scsiconf.h>
+#include <machine/autoconf.h>
+#if defined(MVME187)
+#include <mvme88k/dev/siopreg.h>
+#include <mvme88k/dev/siopvar.h>
+#else
+#include <mvme68k/dev/siopreg.h>
+#include <mvme68k/dev/siopvar.h>
+#endif /* MVME187 */
+
+#if defined(MVME187)
+#include "machine/mmu.h"
+#endif /* defined(MVME187) */
+
+
+extern u_int kvtop();
+
+/*
+ * 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 siop_select __P((struct siop_softc *));
+void siopabort __P((struct siop_softc *, siop_regmap_p, char *));
+void sioperror __P((struct siop_softc *, siop_regmap_p, u_char));
+void siopstart __P((struct siop_softc *));
+int siop_checkintr __P((struct siop_softc *, u_char, u_char, u_char, int *));
+void siopreset __P((struct siop_softc *));
+void siopsetdelay __P((int));
+void siop_scsidone __P((struct siop_acb *, int));
+void siop_sched __P((struct siop_softc *));
+int siop_poll __P((struct siop_softc *, struct siop_acb *));
+void siopintr __P((struct siop_softc *));
+void scsi_period_to_siop __P((struct siop_softc *, int));
+void siop_start __P((struct siop_softc *, int, int, u_char *, int, u_char *, int));
+void siop_dump_acb __P((struct siop_acb *));
+
+/* 53C710 script */
+const
+#if defined(MVME187)
+#include <mvme88k/dev/siop_script.out>
+#else
+#include <mvme68k/dev/siop_script.out>
+#endif /* MVME187 */
+
+u_long scsi_nosync = 0;
+int shift_nosync;
+
+/* default to not inhibit sync negotiation on any drive */
+u_char siop_inhibit_sync[8] = { 0, 0, 0, 0, 0, 0, 0 }; /* initialize, so patchable */
+u_char siop_allow_disc[8] = {3, 3, 3, 3, 3, 3, 3, 3};
+int siop_no_dma = 0;
+
+int siop_reset_delay = 250; /* delay after reset, in milleseconds */
+
+int siop_cmd_wait = SCSI_CMD_WAIT;
+int siop_data_wait = SCSI_DATA_WAIT;
+int siop_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; /* siop_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 - siopintr
+ * 0x08 - phase mismatch
+ * 0x10 - <not used>
+ * 0x20 - panic on unhandled exceptions
+ * 0x100 - disconnect/reselect
+ */
+int siop_debug = 0;
+int siopsync_debug = 0;
+int siopdma_hits = 0;
+int siopdma_misses = 0;
+int siopchain_ints = 0;
+int siopstarts = 0;
+int siopints = 0;
+int siopphmm = 0;
+#define SIOP_TRACE_SIZE 128
+#define SIOP_TRACE(a,b,c,d) \
+ siop_trbuf[siop_trix] = (a); \
+ siop_trbuf[siop_trix+1] = (b); \
+ siop_trbuf[siop_trix+2] = (c); \
+ siop_trbuf[siop_trix+3] = (d); \
+ siop_trix = (siop_trix + 4) & (SIOP_TRACE_SIZE - 1);
+u_char siop_trbuf[SIOP_TRACE_SIZE];
+int siop_trix;
+void siop_dump __P((struct siop_softc *));
+void siop_dump_trace __P((void));
+#else
+#define SIOP_TRACE(a,b,c,d)
+#endif
+
+int kludge_city = 1;
+
+/*
+ * default minphys routine for siop based controllers
+ */
+void
+siop_minphys(bp)
+ struct buf *bp;
+{
+
+ /*
+ * No max transfer at this level.
+ */
+ minphys(bp);
+}
+
+/*
+ * used by specific siop controller
+ *
+ */
+int
+siop_scsicmd(xs)
+ struct scsi_xfer *xs;
+{
+ struct siop_acb *acb;
+ struct siop_softc *sc;
+ struct scsi_link *slp;
+ int flags, s;
+
+ slp = xs->sc_link;
+ sc = slp->adapter_softc;
+ flags = xs->flags;
+
+ /* XXXX ?? */
+ if (flags & SCSI_DATA_UIO)
+ panic("siop: scsi data uio requested");
+
+ /* XXXX ?? */
+ if (sc->sc_nexus && flags & SCSI_POLL)
+/* panic("siop_scsicmd: busy");*/
+ printf("siop_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;
+
+#if defined(MVME187)
+ /*
+ * 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 siop_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);
+ }
+#endif
+ s = splbio();
+ TAILQ_INSERT_TAIL(&sc->ready_list, acb, chain);
+
+ if (sc->sc_nexus == NULL)
+ siop_sched(sc);
+
+ splx(s);
+
+ if (flags & SCSI_POLL || siop_no_dma)
+ return(siop_poll(sc, acb));
+ return(SUCCESSFULLY_QUEUED);
+}
+
+int
+siop_poll(sc, acb)
+ struct siop_softc *sc;
+ struct siop_acb *acb;
+{
+ siop_regmap_p rp = sc->sc_siopp;
+ 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: siop_poll called with disconnected device\n",
+ sc->sc_dev.dv_xname);
+ for (;;) {
+ /* use cmd_wait values? */
+ i = 50000;
+ spl0();
+ while (((istat = rp->siop_istat) &
+ (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) {
+ if (--i <= 0) {
+#ifdef DEBUG
+ printf ("waiting: tgt %d cmd %02x sbcl %02x dsp %lx (+%lx) dcmd %lx ds %p timeout %d\n",
+ xs->sc_link->target, acb->cmd.opcode,
+ rp->siop_sbcl, rp->siop_dsp,
+ rp->siop_dsp - sc->sc_scriptspa,
+ *((long *)&rp->siop_dcmd), &acb->ds, acb->xs->timeout);
+#endif
+ i = 50000;
+ --to;
+ if (to <= 0) {
+ siopreset(sc);
+ return(COMPLETE);
+ }
+ }
+ delay(10);
+ }
+ sstat0 = rp->siop_sstat0;
+ delay(10);
+ dstat = rp->siop_dstat;
+ if (siop_checkintr(sc, istat, dstat, sstat0, &status)) {
+ if (acb != sc->sc_nexus)
+ printf("%s: siop_poll disconnected device completed\n",
+ sc->sc_dev.dv_xname);
+ else if ((sc->sc_flags & SIOP_INTDEFER) == 0) {
+ sc->sc_flags &= ~SIOP_INTSOFF;
+ rp->siop_sien = sc->sc_sien;
+ rp->siop_dien = sc->sc_dien;
+ }
+ siop_scsidone(sc->sc_nexus, status);
+ }
+ if (xs->flags & ITSDONE)
+ break;
+ }
+ splx(s);
+ return (COMPLETE);
+}
+
+/*
+ * start next command that's ready
+ */
+void
+siop_sched(sc)
+ struct siop_softc *sc;
+{
+ struct scsi_link *slp;
+ struct siop_acb *acb;
+ int i;
+
+#ifdef DEBUG
+ if (sc->sc_nexus) {
+ printf("%s: siop_sched- nexus %p/%d ready %p/%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 siop_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: siop_sched didn't find ready command\n",
+ sc->sc_dev.dv_xname);
+#endif
+ return;
+ }
+
+ if (acb->xs->flags & SCSI_RESET)
+ siopreset(sc);
+
+#if 0
+ acb->cmd.bytes[0] |= slp->lun << 5; /* XXXX */
+#endif
+ ++sc->sc_active;
+ siop_select(sc);
+}
+
+void
+siop_scsidone(acb, stat)
+ struct siop_acb *acb;
+ int stat;
+{
+ struct scsi_xfer *xs;
+ struct scsi_link *slp;
+ struct siop_softc *sc;
+ int dosched = 0;
+
+ if (acb == NULL || (xs = acb->xs) == NULL) {
+#ifdef DIAGNOSTIC
+ printf("siop_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;
+ siop_sched(sc);
+ }
+ SIOP_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<<slp->lun);
+ if (sc->ready_list.tqh_first)
+ dosched = 1; /* start next command */
+ --sc->sc_active;
+ SIOP_TRACE('d','a',stat,0)
+ } else if (sc->ready_list.tqh_last == &acb->chain.tqe_next) {
+ TAILQ_REMOVE(&sc->ready_list, acb, chain);
+ SIOP_TRACE('d','r',stat,0)
+ } else {
+ register struct siop_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<<slp->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
+ }
+ SIOP_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)
+ siop_sched(sc);
+}
+
+void
+siopabort(sc, rp, where)
+ register struct siop_softc *sc;
+ siop_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->siop_dstat, rp->siop_sstat0, rp->siop_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 ("siopabort: cleanup!\n");
+ sc->sc_iob[i].sc_xs = NULL;
+ }
+ }
+#endif /* fix_this */
+/* sc->sc_active = 0; */
+ }
+}
+
+void
+siopinitialize(sc)
+ struct siop_softc *sc;
+{
+ int i;
+ u_int inhibit_sync;
+ extern u_long scsi_nosync;
+ extern int shift_nosync;
+
+ /*
+ * Need to check that scripts is on a long word boundary.
+ * Also should verify that dev doesn't span non-contiguous
+ * physical pages.
+ */
+
+ dma_cachectl((vm_offset_t)scripts, sizeof(scripts), DMA_CACHE_SYNC);
+
+ sc->sc_scriptspa = kvtop(scripts);
+
+ /*
+ * malloc sc_acb to ensure that DS is on a long word boundary.
+ */
+
+ MALLOC(sc->sc_acb, struct siop_acb *,
+ sizeof(struct siop_acb) * SIOP_NACB, M_DEVBUF, M_NOWAIT);
+ if (sc->sc_acb == NULL)
+ panic("siopinitialize: 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 (sc->sc_clock_freq <= 25) {
+ sc->sc_dcntl |= 0x80; /* SCLK/1 */
+ sc->sc_tcp[0] = sc->sc_tcp[1];
+ } else if (sc->sc_clock_freq <= 37) {
+ sc->sc_dcntl |= 0x40; /* SCLK/1.5 */
+ sc->sc_tcp[0] = sc->sc_tcp[2];
+ } else if (sc->sc_clock_freq <= 50) {
+ sc->sc_dcntl |= 0x00; /* SCLK/2 */
+ sc->sc_tcp[0] = sc->sc_tcp[3];
+ } else {
+ sc->sc_dcntl |= 0xc0; /* SCLK/3 */
+ sc->sc_tcp[0] = 3000 / sc->sc_clock_freq;
+ }
+
+ if (scsi_nosync) {
+ inhibit_sync = (scsi_nosync >> shift_nosync) & 0xff;
+ shift_nosync += 8;
+#ifdef DEBUG
+ if (inhibit_sync)
+ printf("%s: Inhibiting synchronous transfer %02x\n",
+ sc->sc_dev.dv_xname, inhibit_sync);
+#endif
+ for (i = 0; i < 8; ++i)
+ if (inhibit_sync & (1 << i))
+ siop_inhibit_sync[i] = 1;
+ }
+
+ siopreset (sc);
+}
+
+void
+siopreset(sc)
+ struct siop_softc *sc;
+{
+ siop_regmap_p rp;
+ u_int i, s;
+ u_char dummy;
+ struct siop_acb *acb;
+
+ rp = sc->sc_siopp;
+
+ if (sc->sc_flags & SIOP_ALIVE)
+ siopabort(sc, rp, "reset");
+
+ printf("%s: ", sc->sc_dev.dv_xname); /* XXXX */
+
+ s = splbio();
+
+ /*
+ * Reset the chip
+ * XXX - is this really needed?
+ */
+ rp->siop_istat |= SIOP_ISTAT_ABRT; /* abort current script */
+ rp->siop_istat |= SIOP_ISTAT_RST; /* reset chip */
+ rp->siop_istat &= ~SIOP_ISTAT_RST;
+ /*
+ * Reset SCSI bus (do we really want this?)
+ */
+ rp->siop_sien = 0;
+ rp->siop_scntl1 |= SIOP_SCNTL1_RST;
+ delay(25);
+ rp->siop_scntl1 &= ~SIOP_SCNTL1_RST;
+
+ /*
+ * Set up various chip parameters
+ */
+ rp->siop_scntl0 = SIOP_ARB_FULL | SIOP_SCNTL0_EPC | SIOP_SCNTL0_EPG;
+ rp->siop_scntl1 = SIOP_SCNTL1_ESR;
+ rp->siop_dcntl = sc->sc_dcntl;
+ rp->siop_dmode = 0x80; /* burst length = 4 */
+ rp->siop_sien = 0x00; /* don't enable interrupts yet */
+ rp->siop_dien = 0x00; /* don't enable interrupts yet */
+ rp->siop_scid = 1 << sc->sc_link.adapter_target;
+ rp->siop_dwt = 0x00;
+ rp->siop_ctest0 = (SIOP_CTEST0_EAN|SIOP_CTEST0_BTD);
+ rp->siop_ctest7 = sc->sc_ctest7;
+
+ /* will need to re-negotiate sync xfers */
+ bzero(&sc->sc_sync, sizeof (sc->sc_sync));
+
+ i = rp->siop_istat;
+ if (i & SIOP_ISTAT_SIP)
+ dummy = rp->siop_sstat0;
+ delay(1);
+ if (i & SIOP_ISTAT_DIP)
+ dummy = rp->siop_dstat;
+
+ splx (s);
+
+ delay (siop_reset_delay * 1000);
+ printf("siop id %d reset V%d\n", sc->sc_link.adapter_target,
+ rp->siop_ctest8 >> 4);
+
+ if ((sc->sc_flags & SIOP_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 siop_acb) * SIOP_NACB);
+ for (i = 0; i < SIOP_NACB; i++) {
+
+ pmap_cache_ctrl(pmap_kernel(),
+ M88K_TRUNC_PAGE((vm_offset_t)acb),
+ M88K_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;
+ siop_scsidone(sc->sc_nexus, sc->sc_nexus->stat[0]);
+ }
+ while ((acb = sc->nexus_list.tqh_first) != 0) {
+ acb->xs->error = XS_DRIVER_STUFFUP;
+ siop_scsidone(acb, acb->stat[0]);
+ }
+ }
+
+ sc->sc_flags |= SIOP_ALIVE;
+ sc->sc_flags &= ~(SIOP_INTDEFER|SIOP_INTSOFF);
+ /* enable SCSI and DMA interrupts */
+ /* XXX turn on SEL interrupt? nivas */
+ sc->sc_sien = SIOP_SIEN_M_A | SIOP_SIEN_STO | /*SIOP_SIEN_SEL |*/ SIOP_SIEN_SGE |
+ SIOP_SIEN_UDC | SIOP_SIEN_RST | SIOP_SIEN_PAR;
+ sc->sc_dien = SIOP_DIEN_BF | SIOP_DIEN_ABRT | SIOP_DIEN_SIR |
+ /*SIOP_DIEN_WTD |*/ SIOP_DIEN_IID;
+ rp->siop_sien = sc->sc_sien;
+ rp->siop_dien = sc->sc_dien;
+}
+
+/*
+ * Setup Data Storage for 53C710 and start SCRIPTS processing
+ */
+
+void
+siop_start (sc, target, lun, cbuf, clen, buf, len)
+ struct siop_softc *sc;
+ int target;
+ int lun;
+ u_char *cbuf;
+ int clen;
+ u_char *buf;
+ int len;
+{
+ siop_regmap_p rp = sc->sc_siopp;
+ int nchain;
+ int count, tcount;
+ char *addr, *dmaend;
+ struct siop_acb *acb = sc->sc_nexus;
+#ifdef DEBUG
+ int i;
+#endif
+
+#ifdef DEBUG
+ if (siop_debug & 0x100 && rp->siop_sbcl & SIOP_BSY) {
+ printf ("ACK! siop was busy: rp %p script %p dsa %p active %ld\n",
+ rp, &scripts, &acb->ds, sc->sc_active);
+ printf ("istat %02x sfbr %02x lcrc %02x sien %02x dien %02x\n",
+ rp->siop_istat, rp->siop_sfbr, rp->siop_lcrc,
+ rp->siop_sien, rp->siop_dien);
+#ifdef DDB
+ /*Debugger();*/
+#endif
+ }
+#endif
+ acb->msgout[0] = MSG_IDENTIFY | lun;
+ if (siop_allow_disc[target] & 2 ||
+ (siop_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(&acb->msgout[0]);
+ acb->ds.cmdlen = clen;
+ acb->ds.cmdbuf = (char *) kvtop(cbuf);
+ acb->ds.stslen = 1;
+ acb->ds.stsbuf = (char *) kvtop(&acb->stat[0]);
+ acb->ds.msglen = 1;
+ acb->ds.msgbuf = (char *) kvtop(&acb->msg[0]);
+ acb->msg[1] = -1;
+ acb->ds.msginlen = 1;
+ acb->ds.extmsglen = 1;
+ acb->ds.synmsglen = 3;
+ acb->ds.msginbuf = (char *) kvtop(&acb->msg[1]);
+ acb->ds.extmsgbuf = (char *) kvtop(&acb->msg[2]);
+ acb->ds.synmsgbuf = (char *) kvtop(&acb->msg[3]);
+ bzero(&acb->ds.chain, sizeof (acb->ds.chain));
+
+ if (sc->sc_sync[target].state == SYNC_START) {
+ if (siop_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 (siopsync_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] = SIOP_MAX_OFFSET;
+ acb->ds.idlen = 6;
+ sc->sc_sync[target].state = SYNC_SENT;
+#ifdef DEBUG
+ if (siopsync_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 (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
+ ++siopdma_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 */
+ ++siopdma_misses;
+#endif
+ }
+ ++nchain;
+ }
+#ifdef DEBUG
+ if (nchain != 1 && len != 0 && siop_debug & 3) {
+ printf ("DMA chaining set: %d\n", nchain);
+ for (i = 0; i < nchain; ++i) {
+ printf (" [%d] %8p %lx\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 siop_softc), DMA_CACHE_SYNC);
+ dma_cachectl(acb, sizeof (*acb), DMA_CACHE_SYNC);
+#endif
+ dma_cachectl((vm_offset_t)cbuf, clen, DMA_CACHE_SYNC);
+
+#if defined(MVME187)
+ /*
+ * 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);
+ }
+ }
+#endif
+
+#ifdef DEBUG
+ if (siop_debug & 0x100 && rp->siop_sbcl & SIOP_BSY) {
+ printf ("ACK! siop was busy at start: rp %p script %p dsa %p active %ld\n",
+ rp, &scripts, &acb->ds, sc->sc_active);
+#ifdef DDB
+ /*Debugger();*/
+#endif
+ }
+#endif
+ if (sc->nexus_list.tqh_first == NULL) {
+ if (rp->siop_istat & SIOP_ISTAT_CON) {
+ printf("%s: siop_select while connected:RABSAMCI %x scntl_con %x\n",
+ sc->sc_dev.dv_xname,
+ rp->siop_sbcl, rp->siop_scntl1 & SIOP_SCNTL1_CON);
+ }
+
+ rp->siop_temp = 0;
+ rp->siop_sbcl = sc->sc_sync[target].sbcl;
+ rp->siop_dsa = kvtop(&acb->ds);
+ rp->siop_dsp = sc->sc_scriptspa;
+ SIOP_TRACE('s',1,0,0)
+ } else {
+ /*
+ * SIOP 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->siop_istat & SIOP_ISTAT_CON) == 0) {
+ rp->siop_istat = SIOP_ISTAT_SIGP;
+ SIOP_TRACE('s',2,0,0);
+ }
+ else {
+ SIOP_TRACE('s',3,rp->siop_istat,0);
+ }
+ }
+#ifdef DEBUG
+ ++siopstarts;
+#endif
+}
+
+/*
+ * Process a DMA or SCSI interrupt from the 53C710 SIOP
+ */
+
+int
+siop_checkintr(sc, istat, dstat, sstat0, status)
+ struct siop_softc *sc;
+ u_char istat;
+ u_char dstat;
+ u_char sstat0;
+ int *status;
+{
+ siop_regmap_p rp = sc->sc_siopp;
+ struct siop_acb *acb = sc->sc_nexus;
+ int target = 0;
+ int dfifo, dbc, sstat1;
+ int dummy;
+
+ dfifo = rp->siop_dfifo;
+ dbc = rp->siop_dbc0;
+ sstat1 = rp->siop_sstat1;
+
+ /*
+ * Flush DMA and SCSI FIFOs.
+ */
+ rp->siop_ctest8 |= SIOP_CTEST8_CLF;
+ while ((rp->siop_ctest1 & SIOP_CTEST1_FMT) != SIOP_CTEST1_FMT)
+ ;
+
+#ifdef DEBUG
+ ++siopints;
+#if 0
+ if (siop_debug & 0x100) {
+ cmmu_inval_cache(kvtop(&acb->stat[0]), 1); /* XXX */
+ printf ("siopchkintr: istat %x dstat %x sstat0 %x dsps %x sbcl %x sts %x msg %x\n",
+ istat, dstat, sstat0, rp->siop_dsps, rp->siop_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->siop_dsp && (rp->siop_dsp < sc->sc_scriptspa ||
+ rp->siop_dsp >= sc->sc_scriptspa + sizeof(scripts))) {
+ printf ("%s: dsp not within script dsp %lx scripts %lx:%lx",
+ sc->sc_dev.dv_xname, rp->siop_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
+ SIOP_TRACE('i',dstat,istat,(istat&SIOP_ISTAT_DIP)?rp->siop_dsps&0xff:sstat0);
+ if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff00) {
+ /* Normal completion status, or check condition */
+#ifdef DEBUG
+ if (rp->siop_dsa != kvtop(&acb->ds)) {
+ printf ("siop: invalid dsa: %lx %x\n", rp->siop_dsa,
+ kvtop((caddr_t)&acb->ds));
+ panic("*** siop 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 (siopsync_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_siop (sc, target);
+ }
+ }
+#if CACHECTL
+ /*cmmu_inval_cache(kvtop(&acb->stat[0]), 1);*/
+ dma_cachectl(&acb->stat[0], 1);
+#endif
+ *status = acb->stat[0];
+#ifdef DEBUG
+ if (rp->siop_sbcl & SIOP_BSY) {
+ /*printf ("ACK! siop 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->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect;
+ return 1;
+ }
+
+ if (dstat & SIOP_DSTAT_SIR && (rp->siop_dsps == 0xff01 ||
+ rp->siop_dsps == 0xff02)) {
+
+ if (acb == NULL) {
+ printf("%s: Disconnect with no active command?\n",
+ sc->sc_dev.dv_xname);
+ return (0);
+ }
+#ifdef DEBUG
+ if (siop_debug & 0x100)
+ printf ("%s: ID %02x disconnected TEMP %lx (+%lx) curbuf %lx curlen %lx buf %p len %lx dfifo %x dbc %x sstat1 %x starts %d acb %p\n",
+ sc->sc_dev.dv_xname, 1 << target, rp->siop_temp,
+ rp->siop_temp ? rp->siop_temp - sc->sc_scriptspa : 0,
+ acb->iob_curbuf, acb->iob_curlen,
+ acb->ds.chain[0].databuf, acb->ds.chain[0].datalen, dfifo, dbc, sstat1, siopstarts, acb);
+#endif
+ /*
+ * 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->siop_temp) {
+ int n = rp->siop_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 %lx/%lx chain[0] %p/%lx\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 (siop_debug & 0x100) {
+ printf("%s: TEMP offset %d", sc->sc_dev.dv_xname, n);
+ printf(" curbuf %lx curlen %lx\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 (siop_debug & 0x100)
+ printf ("%s: adjusting DMA chain\n",
+ sc->sc_dev.dv_xname);
+ if (rp->siop_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: ");
+ printf("curbuf %lx curlen %lx i %d\n",
+ acb->iob_curbuf, acb->iob_curlen, i);
+#ifdef DDB
+ Debugger();
+#endif
+ }
+#ifdef DEBUG
+ if (siop_debug & 0x100)
+ printf(" chain[0]: %p/%lx -> %lx/%lx\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 (siop_debug & 0x100)
+ printf(" chain[%d]: %p/%lx -> %p/%lx\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 & SIOP_INTSOFF;
+ sc->sc_nexus = NULL;
+ TAILQ_INSERT_HEAD(&sc->nexus_list, acb, chain);
+ /* start script to wait for reselect */
+ rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect;
+ if (sc->ready_list.tqh_first)
+ siop_sched(sc);
+ return (0);
+ }
+
+ if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff03) {
+
+ int reselid = rp->siop_scratch & 0x7f;
+ int reselun = rp->siop_sfbr & 0x07;
+
+ sc->sc_sstat1 = rp->siop_sbcl; /* XXXX save current SBCL */
+
+#ifdef DEBUG
+ if (siop_debug & 0x100)
+ printf ("%s: target ID %02x reselected dsps %lx\n",
+ sc->sc_dev.dv_xname, reselid,
+ rp->siop_dsps);
+ if ((rp->siop_sfbr & 0x80) == 0)
+ printf("%s: Reselect message in was not identify: %x\n",
+ sc->sc_dev.dv_xname, rp->siop_sfbr);
+#endif
+ /*
+ * If we were trying to start a command when the reselect
+ * occured, 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 (siop_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->siop_dsa = kvtop(&acb->ds);
+ rp->siop_sxfer = sc->sc_sync[acb->xs->sc_link->target].sxfer;
+ rp->siop_sbcl = sc->sc_sync[acb->xs->sc_link->target].sbcl;
+ break;
+ }
+ if (acb == NULL) {
+ printf("%s: target ID %02x reselect nexus_list %p\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->siop_temp = 0;
+ rp->siop_dsp = sc->sc_scriptspa + Ent_switch;
+ return (0);
+ }
+
+ if (dstat & SIOP_DSTAT_SIR && rp->siop_dsps == 0xff04) {
+
+ target = sc->sc_nexus->xs->sc_link->target;
+ rp->siop_temp = 0;
+ rp->siop_dsa = kvtop(&sc->sc_nexus->ds);
+ rp->siop_sxfer = sc->sc_sync[target].sxfer;
+ rp->siop_sbcl = sc->sc_sync[target].sbcl;
+ rp->siop_dsp = sc->sc_scriptspa;
+ return (0);
+ }
+
+ if (dstat & SIOP_DSTAT_SIR && rp->siop_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(&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->siop_sfbr, acb->msg[1], rp->siop_sbcl);
+ siopreset (sc);
+ *status = -1;
+ return 0; /* siopreset has cleaned up */
+ }
+
+ if (dstat & SIOP_DSTAT_SIR && rp->siop_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->siop_sbcl, rp->siop_sbdl);
+ if (rp->siop_sbcl == 0xa7) {
+ /* It is now, just continue the script? */
+ rp->siop_dcntl |= SIOP_DCNTL_STD;
+ return (0);
+ }
+
+ siopreset (sc);
+ *status = -1;
+ return 0; /* siopreset has cleaned up */
+ }
+
+ if (sstat0 & SIOP_SSTAT0_M_A) { /* Phase mismatch */
+
+#ifdef DEBUG
+ printf("%s: Phase mismatch - expecting %x got %x\n",
+ sc->sc_dev.dv_xname, rp->siop_dcmd & 0x07,
+ rp->siop_sstat2 & 0x07);
+ ++siopphmm;
+#endif
+ if (acb == NULL) {
+ printf("%s: Phase mismatch with no active command- expecting %x got %x\n",
+ sc->sc_dev.dv_xname,
+ *((long *)&rp->siop_dcmd) & 0x07000000,
+ rp->siop_sstat2 & 0x07);
+ goto bad_phase;
+ }
+
+ if (acb->iob_len) {
+ int adjust;
+ adjust = ((dfifo - (dbc & 0x7f)) & 0x7f);
+ if (sstat1 & SIOP_SSTAT1_ORF)
+ ++adjust;
+ if (sstat1 & SIOP_SSTAT1_OLF)
+ ++adjust;
+ /* XXX what's with this siop_dcmd here? nivas */
+ acb->iob_curlen = *((long *)&rp->siop_dcmd) & 0xffffff;
+ acb->iob_curlen += adjust;
+ acb->iob_curbuf = *((long *)&rp->siop_dnad) - adjust;
+#ifdef DEBUG
+ if (siop_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->siop_sbcl, siopstarts, 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
+ SIOP_TRACE('m',rp->siop_sbcl,(rp->siop_dsp>>8),rp->siop_dsp);
+ if (siop_debug & 9)
+ printf ("Phase mismatch: %x dsp +%lx dcmd %lx\n",
+ rp->siop_sbcl,
+ rp->siop_dsp - sc->sc_scriptspa,
+ *((long *)&rp->siop_dcmd));
+#endif
+ if ((rp->siop_sbcl & SIOP_REQ) == 0) {
+ printf ("Phase mismatch: REQ not asserted! %02x dsp %lx\n",
+ rp->siop_sbcl, rp->siop_dsp);
+#if defined(DEBUG) && defined(DDB)
+ Debugger();
+#endif
+ goto bad_phase;
+ }
+#if XXX
+ switch (rp->siop_sbcl & 7)
+#endif
+ switch (rp->siop_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->siop_dsp = sc->sc_scriptspa + Ent_switch;
+ break;
+ default:
+ goto bad_phase;
+ }
+ return 0;
+ }
+
+ if (sstat0 & SIOP_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->siop_dsp, *((long *)&rp->siop_dcmd), rp->siop_dsps);
+
+ if ((istat & SIOP_ISTAT_CON) == 0) {
+ printf("selection of %x timeout\n", rp->siop_sdid);
+ } else if ((rp->siop_ctest0 & SIOP_CTEST0_BTD) == 0) {
+ printf("No SCSI activity for 250ms(ctest0 %x %x dsps %x)\n",
+ rp->siop_ctest0,
+ rp->siop_ctest0,
+ rp->siop_dsps);
+ } else {
+ printf("Waited > 250ms for disconnect\n");
+ }
+
+#ifdef DEBUG
+ printf ("scripts %x dsp %x dcmd %x\n", sc->sc_scriptspa,
+ rp->siop_dsp, *((long *)&rp->siop_dcmd));
+
+ printf("msg %x status %x\n", acb->msg[0], acb->stat[0]);
+
+ if (rp->siop_sbcl & SIOP_BSY) {
+ printf ("ACK! siop 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->siop_sbcl, rp->siop_sdid, istat, dstat, sstat0);
+ if (!(rp->siop_sbcl & SIOP_BSY)) {
+ printf ("Yikes, it's not busy now!\n");
+#if 0
+ *status = -1;
+ if (sc->nexus_list.tqh_first)
+ rp->siop_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->siop_dsp;
+ rp->siop_dsp = dummy;
+ } else {
+ rp->siop_dcntl |= SIOP_DCNTL_STD;
+ }
+ return (0);
+#ifdef DDB
+ Debugger();
+#endif
+ }
+#endif
+ if (rp->siop_sbcl & SIOP_BSY) {
+ if (!(rp->siop_sbcl & SIOP_BSY)) {
+ printf ("Yikes, it's not busy now!\n");
+ *status = -1;
+ if (sc->nexus_list.tqh_first)
+ rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect;
+ return 1;
+ }
+
+ rp->siop_dcntl |= SIOP_DCNTL_STD;
+
+ return 0;
+ }
+
+ *status = -1;
+ if (acb)
+ acb->xs->error = XS_SELTIMEOUT;
+ if (sc->nexus_list.tqh_first)
+ rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect;
+ return 1;
+ }
+
+ if (acb)
+ target = acb->xs->sc_link->target;
+ else
+ target = 7;
+
+ if (sstat0 & SIOP_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
+ siopabort (sc, rp, "siopchkintr");
+#endif
+ *status = STS_BUSY;
+ if (sc->nexus_list.tqh_first)
+ rp->siop_dsp = sc->sc_scriptspa + Ent_wait_reselect;
+ return (acb != NULL);
+ }
+
+ if (sstat0 == 0 && dstat & SIOP_DSTAT_SIR) {
+#if CACHECTL
+ /*cmmu_inval_cache(kvtop(&acb->stat[0]), 1); */
+ /*cmmu_inval_cache(kvtop(&acb->msg[0]), 1); */
+ dma_cachectl (&acb->stat[0], 1);
+ dma_cachectl (&acb->msg[0], 1);
+#endif
+ printf ("SIOP interrupt: %lx sts %x msg %x %x sbcl %x\n",
+ rp->siop_dsps, acb->stat[0], acb->msg[0], acb->msg[1],
+ rp->siop_sbcl);
+ siopreset (sc);
+ *status = -1;
+ return 0; /* siopreset has cleaned up */
+ }
+
+ if (sstat0 & SIOP_SSTAT0_SGE)
+ printf ("SIOP: SCSI Gross Error\n");
+
+ if (sstat0 & SIOP_SSTAT0_PAR)
+ printf ("SIOP: Parity Error\n");
+
+ if (dstat & SIOP_DSTAT_IID) {
+ printf ("SIOP: Illegal instruction detected (dsp %x dcmd %x dsps %x)\n",
+ rp->siop_dsp, *((long *)&rp->siop_dcmd),
+ rp->siop_dsps);
+
+ if (*((long *)&rp->siop_dcmd) & 0xf8000000 == 0x48000000) { /* wait disconnect */
+ printf("SIOP 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 ("siopchkintr: target %x ds %p\n", target, &acb->ds);
+ printf ("scripts %lx ds %x rp %x dsp %lx dcmd %lx\n", sc->sc_scriptspa,
+ kvtop(&acb->ds), kvtop(rp), rp->siop_dsp,
+ *((long *)&rp->siop_dcmd));
+ printf ("siopchkintr: istat %x dstat %x sstat0 %x dsps %lx dsa %lx sbcl %x sts %x msg %x %x sfbr %x\n",
+ istat, dstat, sstat0, rp->siop_dsps, rp->siop_dsa,
+ rp->siop_sbcl, acb->stat[0], acb->msg[0], acb->msg[1], rp->siop_sfbr);
+#ifdef DEBUG
+ if (siop_debug & 0x20)
+ panic("siopchkintr: **** temp ****");
+#endif
+#ifdef DDB
+ Debugger ();
+#endif
+#endif /* XXX */
+
+ *status = -1;
+ siopreset (sc); /* hard reset */
+ return 0; /* siopreset cleaned up */
+}
+
+void
+siop_select(sc)
+ struct siop_softc *sc;
+{
+ siop_regmap_p rp;
+ struct siop_acb *acb = sc->sc_nexus;
+
+#ifdef DEBUG
+ if (siop_debug & 1)
+ printf ("%s: select ", sc->sc_dev.dv_xname);
+#endif
+
+ rp = sc->sc_siopp;
+ if (acb->xs->flags & SCSI_POLL || siop_no_dma) {
+ sc->sc_flags |= SIOP_INTSOFF;
+ sc->sc_flags &= ~SIOP_INTDEFER;
+ if ((rp->siop_istat & 0x08) == 0) {
+ rp->siop_sien = 0;
+ rp->siop_dien = 0;
+ }
+#if 0
+ } else if ((sc->sc_flags & SIOP_INTDEFER) == 0) {
+ sc->sc_flags &= ~SIOP_INTSOFF;
+ if ((rp->siop_istat & 0x08) == 0) {
+ rp->siop_sien = sc->sc_sien;
+ rp->siop_dien = sc->sc_dien;
+ }
+#endif
+ }
+#ifdef DEBUG
+ if (siop_debug & 1)
+ printf ("siop_select: target %x cmd %02x ds %p\n",
+ acb->xs->sc_link->target, acb->cmd.opcode,
+ &sc->sc_nexus->ds);
+#endif
+
+ siop_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
+ */
+
+void
+siopintr (sc)
+ register struct siop_softc *sc;
+{
+ siop_regmap_p rp;
+ register u_char istat, dstat, sstat0;
+ int status;
+ int s = splbio();
+
+ istat = sc->sc_istat;
+ if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) {
+ /* is this possible? we won't come here if there is not int!!! XXX */
+ splx(s);
+ return;
+ }
+
+ /* Got a valid interrupt on this device */
+ rp = sc->sc_siopp;
+ dstat = sc->sc_dstat;
+ sstat0 = sc->sc_sstat0;
+ if (dstat & SIOP_DSTAT_SIR)
+ sc->sc_intcode = rp->siop_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 (siop_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 nexus %p status %x\n",
+ sc->sc_dev.dv_xname, istat, dstat, sstat0,
+ sc->sc_nexus, sc->sc_nexus ? sc->sc_nexus->stat[0] : 0);
+ }
+#endif
+
+#ifdef DEBUG
+ if (siop_debug & 5) {
+#if CACHECTL
+ /*cmmu_inval_cache(kvtop(&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->siop_dsps, rp->siop_sbcl,
+ sc->sc_nexus->stat[0], sc->sc_nexus->msg[0]);
+ }
+#endif
+ if (sc->sc_flags & SIOP_INTDEFER) {
+ sc->sc_flags &= ~(SIOP_INTDEFER | SIOP_INTSOFF);
+ rp->siop_sien = sc->sc_sien;
+ rp->siop_dien = sc->sc_dien;
+ }
+ if (siop_checkintr (sc, istat, dstat, sstat0, &status)) {
+ if (status == 0xff)
+ printf ("siopintr: status == 0xff\n");
+ if ((sc->sc_flags & (SIOP_INTSOFF | SIOP_INTDEFER)) != SIOP_INTSOFF) {
+#if 0
+ if (rp->siop_sbcl & SIOP_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->siop_sbcl, rp->siop_sfbr, rp->siop_lcrc,
+ rp->siop_dsp - sc->sc_scriptspa);
+ }
+#endif
+ siop_scsidone(sc->sc_nexus, sc->sc_nexus ?
+ sc->sc_nexus->stat[0] : -1);
+ }
+ }
+ splx(s);
+}
+
+/*
+ * 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_siop (sc, target)
+ struct siop_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 <= SIOP_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 ("siop sync old: siop_sxfr %02x, siop_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("siop 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 <= SIOP_MAX_OFFSET) ?
+ offset : SIOP_MAX_OFFSET);
+#ifdef DEBUG_SYNC
+ printf("siop 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 ("siop sync: siop_sxfr %02x, siop_sbcl %02x\n", sxfer, sbcl);
+#endif
+}
+
+#ifdef DEBUG
+
+#if SIOP_TRACE_SIZE
+void
+siop_dump_trace()
+{
+ int i;
+
+ printf("siop trace: next index %d\n", siop_trix);
+ i = siop_trix;
+ do {
+ printf("%3d: '%c' %02x %02x %02x\n", i, siop_trbuf[i],
+ siop_trbuf[i + 1], siop_trbuf[i + 2], siop_trbuf[i + 3]);
+ i = (i + 4) & (SIOP_TRACE_SIZE - 1);
+ } while (i != siop_trix);
+}
+#endif
+
+void
+siop_dump_acb(acb)
+ struct siop_acb *acb;
+{
+ u_char *b = (u_char *) &acb->cmd;
+ int i;
+
+ printf("acb@%p ", acb);
+ if (acb->xs == NULL) {
+ printf("<unused>\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: %p data %p:%04x ", acb->xs, acb->xs->data,
+ acb->xs->datalen);
+ printf("va %p:%lx ", acb->iob_buf, acb->iob_len);
+ printf("cur %lx:%lx\n", acb->iob_curbuf, acb->iob_curlen);
+}
+
+void
+siop_dump(sc)
+ struct siop_softc *sc;
+{
+ struct siop_acb *acb;
+ siop_regmap_p rp = sc->sc_siopp;
+ int s;
+ int i;
+
+ s = splbio();
+#if SIOP_TRACE_SIZE
+ siop_dump_trace();
+#endif
+ printf("%s@%p regs %p istat %x\n",
+ sc->sc_dev.dv_xname, sc, rp, rp->siop_istat);
+ if ((acb = sc->free_list.tqh_first) != 0) {
+ printf("Free list:\n");
+ while (acb) {
+ siop_dump_acb(acb);
+ acb = acb->chain.tqe_next;
+ }
+ }
+ if ((acb = sc->ready_list.tqh_first) != 0) {
+ printf("Ready list:\n");
+ while (acb) {
+ siop_dump_acb(acb);
+ acb = acb->chain.tqe_next;
+ }
+ }
+ if ((acb = sc->nexus_list.tqh_first) != 0) {
+ printf("Nexus list:\n");
+ while (acb) {
+ siop_dump_acb(acb);
+ acb = acb->chain.tqe_next;
+ }
+ }
+ if (sc->sc_nexus) {
+ printf("Nexus:\n");
+ siop_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
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-01 23:01:36 +0000