/* $OpenBSD: ssh.c,v 1.16 2007/05/29 13:56:13 pyr 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 <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 <sys/queue.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#include <machine/autoconf.h>
#include <machine/cpu.h>
#include <mvme68k/dev/sshreg.h>
#include <mvme68k/dev/sshvar.h>
/*
* 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 *);
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 *);
void sshintr(struct ssh_softc *);
void sshinitialize(struct ssh_softc *);
void ssh_start(struct ssh_softc *, int, int, u_char *, int, u_char *, int);
int ssh_checkintr(struct ssh_softc *, u_char, u_char, u_char, int *);
void scsi_period_to_ssh(struct ssh_softc *, int);
/* 53C710 script */
const
#include <mvme68k/dev/ssh_script.out>
/* 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
/*
* 0x01 - full debug
* 0x02 - DMA chaining
* 0x04 - sshintr
* 0x08 - phase mismatch
* 0x10 - <not used>
* 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;
#else
#define SSH_TRACE(a,b,c,d)
#endif
/*
* 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;
/* XXXX ?? */
if (flags & SCSI_DATA_UIO)
panic("ssh: scsi data uio requested");
/* XXXX ?? */
if (sc->sc_nexus && flags & SCSI_POLL)
panic("ssh_scsicmd: busy");
s = splbio();
acb = TAILQ_FIRST(&sc->free_list);
if (acb) {
TAILQ_REMOVE(&sc->free_list, acb, chain);
}
splx(s);
if (acb == NULL) {
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;
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 (!TAILQ_EMPTY(&sc->nexus_list))
printf("%s: ssh_poll called with disconnected device\n",
sc->sc_dev.dv_xname);
for (;;) {
/* use cmd_wait values? */
i = 50000;
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;
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,
TAILQ_FIRST(&sc->ready_list),
TAILQ_FIRST(&sc->ready_list)->xs->sc_link->target);
return;
}
#endif
TAILQ_FOREACH(acb, &sc->ready_list, chain) {
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;
struct scsi_link *slp;
struct ssh_softc *sc;
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<<slp->lun);
if (!TAILQ_EMPTY(&sc->ready_list))
dosched = 1; /* start next command */
--sc->sc_active;
SSH_TRACE('d','a',stat,0)
} else if (TAILQ_LAST(&sc->ready_list, acb_list) ==
TAILQ_NEXT(acb, chain)) {
TAILQ_REMOVE(&sc->ready_list, acb, chain);
SSH_TRACE('d','r',stat,0)
} else {
register struct ssh_acb *acb2;
TAILQ_FOREACH(acb2, &sc->nexus_list, chain)
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 (TAILQ_NEXT(acb, chain) != NULL) {
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((vaddr_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(1);
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;
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++) {
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 = TAILQ_FIRST(&sc->nexus_list))) {
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 */
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;
#ifdef DEBUG
int i;
#endif
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((vaddr_t)&acb->msgout[0]);
acb->ds.cmdlen = clen;
acb->ds.cmdbuf = (char *) kvtop((vaddr_t)cbuf);
acb->ds.stslen = 1;
acb->ds.stsbuf = (char *) kvtop((vaddr_t)&acb->stat[0]);
acb->ds.msglen = 1;
acb->ds.msgbuf = (char *) kvtop((vaddr_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((vaddr_t)&acb->msg[1]);
acb->ds.extmsgbuf = (char *) kvtop((vaddr_t)&acb->msg[2]);
acb->ds.synmsgbuf = (char *) kvtop((vaddr_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 ((vaddr_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) {
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
/* push data cache for all data the 53c710 needs to access */
dma_cachectl((caddr_t)acb, sizeof (struct ssh_acb));
dma_cachectl(cbuf, clen);
if (buf != NULL && len != 0)
dma_cachectl(buf, len);
#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 (TAILQ_EMPTY(&sc->nexus_list)) {
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((vaddr_t)&acb->ds);
rp->ssh_dsp = sc->sc_scriptspa;
SSH_TRACE('s',1,0,0)
} else {
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;
int dfifo, dbc, sstat1;
dfifo = rp->ssh_dfifo;
dbc = rp->ssh_dbc0;
sstat1 = rp->ssh_sstat1;
rp->ssh_ctest8 |= SSH_CTEST8_CLF;
while ((rp->ssh_ctest1 & SSH_CTEST1_FMT) != SSH_CTEST1_FMT)
;
rp->ssh_ctest8 &= ~SSH_CTEST8_CLF;
#ifdef DEBUG
++sshints;
#if 0
if (ssh_debug & 0x100) {
dma_cachectl(&acb->stat[0], 1);
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);
Debugger();
}
#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(&acb->ds)) {
printf ("ssh: invalid dsa: %x %x\n", rp->ssh_dsa,
kvtop(&acb->ds));
panic("*** ssh DSA invalid ***");
}
#endif
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);
}
}
dma_cachectl(&acb->stat[0], 1);
*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 (!TAILQ_EMPTY(&sc->nexus_list))
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
dma_cachectl((caddr_t)acb, sizeof(*acb));
}
#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 %lx\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 (!TAILQ_EMPTY(&sc->nexus_list))
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 (!TAILQ_EMPTY(&sc->nexus_list))
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 (!TAILQ_EMPTY(&sc->nexus_list))
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 %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 (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;
dma_cachectl((caddr_t)&acb->ds.chain,
j * sizeof(acb->ds.chain[0]));
}
++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 (!TAILQ_EMPTY(&sc->ready_list))
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 (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
*/
TAILQ_FOREACH(acb, &sc->nexus_list, chain) {
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;
dma_cachectl(&acb->stat[0], 1); /* XXX necessary? */
rp->ssh_dsa = kvtop((vaddr_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 %p\n",
sc->sc_dev.dv_xname, reselid,
TAILQ_FIRST(&sc->nexus_list));
panic("unable to find reselecting device");
}
dma_cachectl((caddr_t)acb, sizeof(*acb));
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;
/* reselect was interrupted (by Sig_P or select) */
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((vaddr_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 */
dma_cachectl(&acb->msg[1],1);
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? */
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);
}
}
if (sstat0 == 0 && dstat & SSH_DSTAT_SIR) {
dma_cachectl(&acb->stat[0], 1);
dma_cachectl(&acb->msg[0], 1);
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: Invalid instruction detected\n");
bad_phase:
/*
* 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 %p\n", target, &acb->ds);
printf ("scripts %lx ds %lx rp %lx dsp %lx dcmd %lx\n", sc->sc_scriptspa,
kvtop((vaddr_t)&acb->ds), kvtop((vaddr_t)rp), rp->ssh_dsp,
*((long *)&rp->ssh_dcmd));
printf ("sshchkintr: istat %x dstat %x sstat0 %x dsps %lx "
"dsa %lx 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
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
*/
void
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) {
splx(s);
return;
}
/* 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;
sc->sc_istat = 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]);
}
#else
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]);
return;
}
#endif
#ifdef DEBUG
if (ssh_debug & 5) {
dma_cachectl(&sc->sc_nexus->stat[0], 1);
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);
}
/*
* This is based on the Progressive Peripherals 33MHz Zeus driver and will
* not be correct for other 53c710 boards.
*
*/
void
scsi_period_to_ssh (sc, target)
struct ssh_softc *sc;
int target;
{
int period, offset, sxfer, sbcl;
period = sc->sc_nexus->msg[4];
offset = sc->sc_nexus->msg[5];
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);
sc->sc_sync[target].sxfer = sxfer;
sc->sc_sync[target].sbcl = sbcl;
#ifdef DEBUG
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;
#if SSH_TRACE_SIZE
ssh_dump_trace();
#endif
printf("acb@%x ", 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: %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();
printf("%s@%x regs %x istat %x\n",
sc->sc_dev.dv_xname, sc, rp, rp->ssh_istat);
if (acb = TAILQ_FIRST(&sc->free_list)) {
printf("Free list:\n");
while (acb) {
ssh_dump_acb(acb);
acb = TAILQ_NEXT(acb, chain);
}
}
if (acb = TAILQ_FIRST(&sc->ready_list)) {
printf("Ready list:\n");
while (acb) {
ssh_dump_acb(acb);
acb = TAILQ_NEXT(acb, chain);
}
}
if (acb = TAILQ_FIRST(&sc->nexus_list)) {
printf("Nexus list:\n");
while (acb) {
ssh_dump_acb(acb);
acb = TAILQ_NEXT(acb, chain);
}
}
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
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