/* $NetBSD: sbic.c,v 1.17 2012/10/27 17:17:23 chs Exp $ */
/*
* Copyright (c) 2001 Richard Earnshaw
* All rights reserved.
*
* 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. The name of the company nor the name of the author may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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
* POSSIBILITY OF SUCH DAMAGE.
*
* 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.
*
* Copyright (c) 1994 Christian E. Hopps
*
* 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.
*
* from: sbic.c,v 1.21 1996/01/07 22:01:54
*/
/*
* WD 33C93 scsi adaptor driver
*/
#if 0
/*
* The UPROTECTED_CSR code is bogus. It can read the csr (SCSI Status
* register) at times when an interrupt may be pending. Doing this will
* clear the interrupt, so we won't see it at times when we really need
* to.
*/
#define UNPROTECTED_CSR
#endif
#ifndef DEBUG
#define DEBUG
#endif
/* #define SBIC_DEBUG(a) a */
#include "opt_ddb.h"
#include <sys/param.h>
__KERNEL_RCSID(0, "$NetBSD: sbic.c,v 1.17 2012/10/27 17:17:23 chs Exp $");
#include <sys/systm.h>
#include <sys/callout.h>
#include <sys/kernel.h> /* For hz */
#include <sys/device.h>
#include <sys/buf.h>
#include <sys/bus.h>
#include <uvm/uvm_extern.h>
#include <machine/intr.h>
#include <dev/scsipi/scsi_all.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsiconf.h>
#include <acorn32/podulebus/sbicreg.h>
#include <acorn32/podulebus/sbicvar.h>
/*
* SCSI delays
* In u-seconds, primarily for state changes on the SPC.
*/
#define SBIC_CMD_WAIT 50000 /* wait per step of 'immediate' cmds */
#define SBIC_DATA_WAIT 50000 /* wait per data in/out step */
#define SBIC_INIT_WAIT 50000 /* wait per step (both) during init */
#define SBIC_WAIT(regs, until, timeo) sbicwait(regs, until, timeo, __LINE__)
static int sbicicmd (struct sbic_softc *, int, int,
struct sbic_acb *);
static int sbicgo (struct sbic_softc *, struct scsipi_xfer *);
static int sbicwait (sbic_regmap_p, char, int , int);
static int sbicselectbus (struct sbic_softc *, sbic_regmap_p, u_char,
u_char, u_char);
static int sbicxfstart (sbic_regmap_p, int, u_char, int);
static int sbicxfout (sbic_regmap_p regs, int, void *, int);
static int sbicfromscsiperiod (struct sbic_softc *, sbic_regmap_p, int);
static int sbictoscsiperiod (struct sbic_softc *, sbic_regmap_p, int);
static int sbicpoll (struct sbic_softc *);
static int sbicnextstate (struct sbic_softc *, u_char, u_char);
static int sbicmsgin (struct sbic_softc *);
static int sbicxfin (sbic_regmap_p regs, int, void *);
static int sbicabort (struct sbic_softc *, sbic_regmap_p, const char *);
static void sbicxfdone (struct sbic_softc *, sbic_regmap_p, int);
static void sbicerror (struct sbic_softc *, sbic_regmap_p, u_char);
static void sbicreset (struct sbic_softc *);
static void sbic_scsidone (struct sbic_acb *, int);
static void sbic_sched (struct sbic_softc *);
static void sbic_save_ptrs (struct sbic_softc *, sbic_regmap_p);
/*
* Synch xfer parameters, and timing conversions
*/
int sbic_min_period = SBIC_SYN_MIN_PERIOD; /* in cycles = f(ICLK,FSn) */
int sbic_max_offset = SBIC_SYN_MAX_OFFSET; /* pure number */
int sbic_cmd_wait = SBIC_CMD_WAIT;
int sbic_data_wait = SBIC_DATA_WAIT;
int sbic_init_wait = SBIC_INIT_WAIT;
/*
* was broken before.. now if you want this you get it for all drives
* on sbic controllers.
*/
u_char sbic_inhibit_sync[8];
int sbic_enable_reselect = 1;
int sbic_clock_override = 0;
int sbic_no_dma = 1; /* was 0 */
int sbic_parallel_operations = 1;
#ifdef DEBUG
sbic_regmap_p debug_sbic_regs;
int sbicdma_ops = 0; /* total DMA operations */
int sbicdma_saves = 0;
#define QPRINTF(a) if (sbic_debug > 1) printf a
#define DBGPRINTF(x,p) if (p) printf x
#define DBG(x) x
int sbic_debug = 0;
int sync_debug = 0;
int sbic_dma_debug = 0;
int reselect_debug = 0;
int data_pointer_debug = 0;
u_char debug_asr, debug_csr, routine;
void sbicdumpstate (void);
void sbictimeout (struct sbic_softc *);
void sbic_dump (struct sbic_softc *);
void sbic_dump_acb (struct sbic_acb *);
#define CSR_TRACE_SIZE 32
#if CSR_TRACE_SIZE
#define CSR_TRACE(w,c,a,x) do { \
int _s = splbio(); \
csr_trace[csr_traceptr].whr = (w); csr_trace[csr_traceptr].csr = (c); \
csr_trace[csr_traceptr].asr = (a); csr_trace[csr_traceptr].xtn = (x); \
csr_traceptr = (csr_traceptr + 1) & (CSR_TRACE_SIZE - 1); \
splx(_s); \
} while (0)
int csr_traceptr;
int csr_tracesize = CSR_TRACE_SIZE;
struct {
u_char whr;
u_char csr;
u_char asr;
u_char xtn;
} csr_trace[CSR_TRACE_SIZE];
#else
#define CSR_TRACE
#endif
#define SBIC_TRACE_SIZE 0
#if SBIC_TRACE_SIZE
#define SBIC_TRACE(dev) do { \
int s = splbio(); \
sbic_trace[sbic_traceptr].sp = &s; \
sbic_trace[sbic_traceptr].line = __LINE__; \
sbic_trace[sbic_traceptr].sr = s; \
sbic_trace[sbic_traceptr].csr = csr_traceptr; \
sbic_traceptr = (sbic_traceptr + 1) & (SBIC_TRACE_SIZE - 1); \
splx(s); \
} while (0)
int sbic_traceptr;
int sbic_tracesize = SBIC_TRACE_SIZE;
struct {
void *sp;
u_short line;
u_short sr;
int csr;
} sbic_trace[SBIC_TRACE_SIZE];
#else
#define SBIC_TRACE(dev)
#endif
#else
#define QPRINTF(a)
#define DBGPRINTF(x,p)
#define DBG(x)
#define CSR_TRACE
#define SBIC_TRACE
#endif
#ifndef SBIC_DEBUG
#define SBIC_DEBUG(x)
#endif
/*
* default minphys routine for sbic based controllers
*/
void
sbic_minphys(struct buf *bp)
{
/*
* No max transfer at this level.
*/
minphys(bp);
}
/*
* Save DMA pointers. Take into account partial transfer. Shut down DMA.
*/
static void
sbic_save_ptrs(struct sbic_softc *dev, sbic_regmap_p regs)
{
int count, asr, s;
struct sbic_acb* acb;
SBIC_TRACE(dev);
if (!(dev->sc_flags & SBICF_INDMA))
return; /* DMA not active */
s = splbio();
acb = dev->sc_nexus;
if (acb == NULL) {
splx(s);
return;
}
count = -1;
do {
GET_SBIC_asr(regs, asr);
if (asr & SBIC_ASR_DBR) {
printf("sbic_save_ptrs: asr %02x canceled!\n", asr);
splx(s);
SBIC_TRACE(dev);
return;
}
} while (asr & (SBIC_ASR_BSY | SBIC_ASR_CIP));
/* Save important state */
/* must be done before dmastop */
SBIC_TC_GET(regs, count);
/* Shut down DMA ====CAREFUL==== */
dev->sc_dmastop(dev->sc_dmah, dev->sc_dmat, acb);
dev->sc_flags &= ~SBICF_INDMA;
#ifdef DIAGNOSTIC
{
int count2;
SBIC_TC_GET(regs, count2);
if (count2 != count)
panic("sbic_save_ptrs: DMA was still active(%d,%d)",
count, count2);
}
#endif
/* Note where we got to before stopping. We need this to resume
later. */
acb->offset += acb->sc_tcnt - count;
SBIC_TC_PUT(regs, 0);
DBGPRINTF(("SBIC saving tgt %d data pointers: Offset now %d ASR:%02x",
dev->target, acb->offset, asr), data_pointer_debug >= 1);
acb->sc_tcnt = 0;
DBG(sbicdma_saves++);
splx(s);
SBIC_TRACE(dev);
}
/*
* used by specific sbic controller
*
* it appears that the higher level code does nothing with LUN's
* so I will too. I could plug it in, however so could they
* in scsi_scsi_cmd().
*/
void
sbic_scsi_request(struct scsipi_channel *chan,
scsipi_adapter_req_t req, void *arg)
{
struct scsipi_xfer *xs;
struct sbic_acb *acb;
struct sbic_softc *dev = device_private(chan->chan_adapter->adapt_dev);
struct scsipi_periph *periph;
int flags, s, stat;
switch (req) {
case ADAPTER_REQ_RUN_XFER:
xs = arg;
periph = xs->xs_periph;
SBIC_TRACE(dev);
flags = xs->xs_control;
if (flags & XS_CTL_DATA_UIO)
panic("sbic: scsi data uio requested");
if (dev->sc_nexus && (flags & XS_CTL_POLL))
panic("sbic_scsicmd: busy");
s = splbio();
acb = dev->free_list.tqh_first;
if (acb)
TAILQ_REMOVE(&dev->free_list, acb, chain);
splx(s);
if (acb == NULL) {
DBG(printf("sbic_scsicmd: unable to queue request for "
"target %d\n", periph->periph_target));
#if defined(DDB) && defined(DEBUG)
Debugger();
#endif
xs->error = XS_RESOURCE_SHORTAGE;
SBIC_TRACE(dev);
scsipi_done(xs);
return;
}
acb->flags = ACB_ACTIVE;
if (flags & XS_CTL_DATA_IN)
acb->flags |= ACB_DATAIN;
acb->xs = xs;
memcpy(&acb->cmd, xs->cmd, xs->cmdlen);
acb->clen = xs->cmdlen;
acb->data = xs->data;
acb->datalen = xs->datalen;
QPRINTF(("sbic_scsi_request: Cmd %02x (len %d), Data %p(%d)\n",
(unsigned) acb->cmd.opcode, acb->clen, xs->data,
xs->datalen));
if (flags & XS_CTL_POLL) {
s = splbio();
/*
* This has major side effects -- it locks up the
* machine.
*/
dev->sc_flags |= SBICF_ICMD;
do {
while (dev->sc_nexus)
sbicpoll(dev);
dev->sc_nexus = acb;
dev->sc_stat[0] = -1;
dev->target = periph->periph_target;
dev->lun = periph->periph_lun;
stat = sbicicmd(dev, periph->periph_target,
periph->periph_lun, acb);
} while (dev->sc_nexus != acb);
sbic_scsidone(acb, stat);
splx(s);
SBIC_TRACE(dev);
return;
}
s = splbio();
TAILQ_INSERT_TAIL(&dev->ready_list, acb, chain);
if (dev->sc_nexus) {
splx(s);
SBIC_TRACE(dev);
return;
}
/*
* Nothing is active, try to start it now.
*/
sbic_sched(dev);
splx(s);
SBIC_TRACE(dev);
/* TODO: add sbic_poll to do XS_CTL_POLL operations */
return;
case ADAPTER_REQ_GROW_RESOURCES:
case ADAPTER_REQ_SET_XFER_MODE:
/* XXX Not supported. */
return;
}
}
/*
* attempt to start the next available command
*/
static void
sbic_sched(struct sbic_softc *dev)
{
struct scsipi_xfer *xs;
struct scsipi_periph *periph;
struct sbic_acb *acb;
int flags, /*phase,*/ stat, i;
SBIC_TRACE(dev);
if (dev->sc_nexus)
return; /* a command is current active */
SBIC_TRACE(dev);
for (acb = dev->ready_list.tqh_first; acb; acb = acb->chain.tqe_next) {
periph = acb->xs->xs_periph;
i = periph->periph_target;
if (!(dev->sc_tinfo[i].lubusy & (1 << periph->periph_lun))) {
struct sbic_tinfo *ti = &dev->sc_tinfo[i];
TAILQ_REMOVE(&dev->ready_list, acb, chain);
dev->sc_nexus = acb;
periph = acb->xs->xs_periph;
ti = &dev->sc_tinfo[periph->periph_target];
ti->lubusy |= (1 << periph->periph_lun);
break;
}
}
SBIC_TRACE(dev);
if (acb == NULL)
return; /* did not find an available command */
xs = acb->xs;
periph = xs->xs_periph;
flags = xs->xs_control;
if (flags & XS_CTL_RESET)
sbicreset(dev);
DBGPRINTF(("sbic_sched(%d,%d)\n", periph->periph_target,
periph->periph_lun), data_pointer_debug > 1);
DBG(if (data_pointer_debug > 1) sbic_dump_acb(acb));
dev->sc_stat[0] = -1;
dev->target = periph->periph_target;
dev->lun = periph->periph_lun;
/* Decide if we can use DMA for this transfer. */
if ((flags & XS_CTL_POLL) == 0
&& !sbic_no_dma
&& dev->sc_dmaok(dev->sc_dmah, dev->sc_dmat, acb))
acb->flags |= ACB_DMA;
if ((flags & XS_CTL_POLL) ||
(!sbic_parallel_operations && (acb->flags & ACB_DMA) == 0))
stat = sbicicmd(dev, periph->periph_target,
periph->periph_lun, acb);
else if (sbicgo(dev, xs) == 0 && xs->error != XS_SELTIMEOUT) {
SBIC_TRACE(dev);
return;
} else
stat = dev->sc_stat[0];
sbic_scsidone(acb, stat);
SBIC_TRACE(dev);
}
static void
sbic_scsidone(struct sbic_acb *acb, int stat)
{
struct scsipi_xfer *xs;
struct scsipi_periph *periph;
struct sbic_softc *dev;
/* int s;*/
int dosched = 0;
xs = acb->xs;
periph = xs->xs_periph;
dev = device_private(periph->periph_channel->chan_adapter->adapt_dev);
SBIC_TRACE(dev);
#ifdef DIAGNOSTIC
if (acb == NULL || xs == NULL) {
printf("sbic_scsidone -- (%d,%d) no scsipi_xfer\n",
dev->target, dev->lun);
#ifdef DDB
Debugger();
#endif
return;
}
#endif
DBGPRINTF(("scsidone: (%d,%d)->(%d,%d)%02x acbfl=%x\n",
periph->periph_target, periph->periph_lun,
dev->target, dev->lun, stat, acb->flags),
data_pointer_debug > 1);
DBG(if (xs->xs_periph->periph_target == dev->sc_channel.chan_id)
panic("target == hostid"));
xs->status = stat;
xs->resid = 0;
if (xs->error == XS_NOERROR) {
if (stat == SCSI_CHECK || stat == SCSI_BUSY)
xs->error = XS_BUSY;
}
/*
* 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 == dev->sc_nexus) {
dev->sc_nexus = NULL;
dev->sc_tinfo[periph->periph_target].lubusy &=
~(1 << periph->periph_lun);
if (dev->ready_list.tqh_first)
dosched = 1; /* start next command */
} else if (dev->ready_list.tqh_last == &acb->chain.tqe_next) {
TAILQ_REMOVE(&dev->ready_list, acb, chain);
} else {
register struct sbic_acb *acb2;
for (acb2 = dev->nexus_list.tqh_first; acb2;
acb2 = acb2->chain.tqe_next) {
if (acb2 == acb) {
TAILQ_REMOVE(&dev->nexus_list, acb, chain);
dev->sc_tinfo[periph->periph_target].lubusy
&= ~(1 << periph->periph_lun);
break;
}
}
if (acb2)
;
else if (acb->chain.tqe_next) {
TAILQ_REMOVE(&dev->ready_list, acb, chain);
} else {
printf("%s: can't find matching acb\n",
device_xname(dev->sc_dev));
#ifdef DDB
Debugger();
#endif
}
}
/* Put it on the free list. */
acb->flags = ACB_FREE;
TAILQ_INSERT_HEAD(&dev->free_list, acb, chain);
dev->sc_tinfo[periph->periph_target].cmds++;
scsipi_done(xs);
if (dosched)
sbic_sched(dev);
SBIC_TRACE(dev);
}
static int
sbicwait(sbic_regmap_p regs, char until, int timeo, int line)
{
u_char val;
int csr;
SBIC_TRACE((struct sbic_softc *)0);
if (timeo == 0)
timeo = 1000000; /* some large value.. */
GET_SBIC_asr(regs,val);
while ((val & until) == 0) {
if (timeo-- == 0) {
GET_SBIC_csr(regs, csr);
printf("sbicwait TIMEO @%d with asr=x%x csr=x%x\n",
line, val, csr);
#if defined(DDB) && defined(DEBUG)
Debugger();
#endif
return val; /* Maybe I should abort */
break;
}
DELAY(1);
GET_SBIC_asr(regs,val);
}
SBIC_TRACE((struct sbic_softc *)0);
return val;
}
static int
sbicabort(struct sbic_softc *dev, sbic_regmap_p regs, const char *where)
{
u_char csr, asr;
GET_SBIC_asr(regs, asr);
GET_SBIC_csr(regs, csr);
printf ("%s: abort %s: csr = 0x%02x, asr = 0x%02x\n",
device_xname(dev->sc_dev), where, csr, asr);
#if 0
/* Clean up running command */
if (dev->sc_nexus != NULL) {
dev->sc_nexus->xs->error = XS_DRIVER_STUFFUP;
sbic_scsidone(dev->sc_nexus, dev->sc_stat[0]);
}
while (acb = dev->nexus_list.tqh_first) {
acb->xs->error = XS_DRIVER_STUFFUP;
sbic_scsidone(acb, -1 /*acb->stat[0]*/);
}
#endif
/* Clean up chip itself */
if (dev->sc_flags & SBICF_SELECTED) {
while (asr & SBIC_ASR_DBR) {
/* sbic is jammed w/data. need to clear it */
/* But we don't know what direction it needs to go */
GET_SBIC_data(regs, asr);
printf("%s: abort %s: clearing data buffer 0x%02x\n",
device_xname(dev->sc_dev), where, asr);
GET_SBIC_asr(regs, asr);
/* Not the read direction, then */
if (asr & SBIC_ASR_DBR)
SET_SBIC_data(regs, asr);
GET_SBIC_asr(regs, asr);
}
WAIT_CIP(regs);
printf("%s: sbicabort - sending ABORT command\n",
device_xname(dev->sc_dev));
SET_SBIC_cmd(regs, SBIC_CMD_ABORT);
WAIT_CIP(regs);
GET_SBIC_asr(regs, asr);
if (asr & (SBIC_ASR_BSY | SBIC_ASR_LCI)) {
/* ok, get more drastic.. */
printf("%s: sbicabort - asr %x, trying to reset\n",
device_xname(dev->sc_dev), asr);
sbicreset(dev);
dev->sc_flags &= ~SBICF_SELECTED;
return -1;
}
printf("%s: sbicabort - sending DISC command\n",
device_xname(dev->sc_dev));
SET_SBIC_cmd(regs, SBIC_CMD_DISC);
do {
asr = SBIC_WAIT (regs, SBIC_ASR_INT, 0);
GET_SBIC_csr (regs, csr);
CSR_TRACE('a',csr,asr,0);
} while ((csr != SBIC_CSR_DISC) && (csr != SBIC_CSR_DISC_1)
&& (csr != SBIC_CSR_CMD_INVALID));
/* lets just hope it worked.. */
dev->sc_flags &= ~SBICF_SELECTED;
}
return -1;
}
/*
* Initialize driver-private structures
*/
int
sbicinit(struct sbic_softc *dev)
{
sbic_regmap_p regs;
u_int i;
/* u_int my_id, s;*/
/* u_char csr;*/
struct sbic_acb *acb;
u_int inhibit_sync;
extern u_long scsi_nosync;
extern int shift_nosync;
SBIC_DEBUG(printf("sbicinit:\n"));
regs = &dev->sc_sbicp;
if ((dev->sc_flags & SBICF_ALIVE) == 0) {
TAILQ_INIT(&dev->ready_list);
TAILQ_INIT(&dev->nexus_list);
TAILQ_INIT(&dev->free_list);
callout_init(&dev->sc_timo_ch, 0);
dev->sc_nexus = NULL;
acb = dev->sc_acb;
memset(acb, 0, sizeof(dev->sc_acb));
SBIC_DEBUG(printf("sbicinit: %d\n", __LINE__));
for (i = 0; i < sizeof(dev->sc_acb) / sizeof(*acb); i++) {
TAILQ_INSERT_TAIL(&dev->free_list, acb, chain);
acb++;
}
memset(dev->sc_tinfo, 0, sizeof(dev->sc_tinfo));
/* make sure timeout is really not needed */
DBG(callout_reset(&dev->sc_timo_ch, 30 * hz,
(void *)sbictimeout, dev));
} else
panic("sbic: reinitializing driver!");
SBIC_DEBUG(printf("sbicinit: %d\n", __LINE__));
dev->sc_flags |= SBICF_ALIVE;
dev->sc_flags &= ~SBICF_SELECTED;
/* initialize inhibit array */
if (scsi_nosync) {
SBIC_DEBUG(printf("sbicinit: %d\n", __LINE__));
inhibit_sync = (scsi_nosync >> shift_nosync) & 0xff;
shift_nosync += 8;
DBGPRINTF(("%s: Inhibiting synchronous transfer %02x\n",
device_xname(dev->sc_dev), inhibit_sync), inhibit_sync);
for (i = 0; i < 8; ++i)
if (inhibit_sync & (1 << i))
sbic_inhibit_sync[i] = 1;
}
SBIC_DEBUG(printf("sbicinit: %d\n", __LINE__));
sbicreset(dev);
return 0;
}
static void
sbicreset(struct sbic_softc *dev)
{
sbic_regmap_p regs;
u_int my_id, s;
/* u_int i;*/
u_char csr;
/* struct sbic_acb *acb;*/
SBIC_DEBUG(printf("sbicreset: %d\n", __LINE__));
regs = &dev->sc_sbicp;
SBIC_DEBUG(printf("sbicreset: regs = %08x\n", regs));
#if 0
if (dev->sc_flags & SBICF_ALIVE) {
SET_SBIC_cmd(regs, SBIC_CMD_ABORT);
WAIT_CIP(regs);
}
#else
SET_SBIC_cmd(regs, SBIC_CMD_ABORT);
SBIC_DEBUG(printf("sbicreset: %d\n", __LINE__));
WAIT_CIP(regs);
SBIC_DEBUG(printf("sbicreset: %d\n", __LINE__));
#endif
s = splbio();
my_id = dev->sc_channel.chan_id & SBIC_ID_MASK;
/* Enable advanced mode */
my_id |= SBIC_ID_EAF /*| SBIC_ID_EHP*/ ;
SET_SBIC_myid(regs, my_id);
SBIC_DEBUG(printf("sbicreset: %d\n", __LINE__));
/*
* Disable interrupts (in dmainit) then reset the chip
*/
SET_SBIC_cmd(regs, SBIC_CMD_RESET);
DELAY(25);
SBIC_WAIT(regs, SBIC_ASR_INT, 0);
GET_SBIC_csr(regs, csr); /* clears interrupt also */
if (dev->sc_clkfreq < 110)
my_id |= SBIC_ID_FS_8_10;
else if (dev->sc_clkfreq < 160)
my_id |= SBIC_ID_FS_12_15;
else if (dev->sc_clkfreq < 210)
my_id |= SBIC_ID_FS_16_20;
SET_SBIC_myid(regs, my_id);
SBIC_DEBUG(printf("sbicreset: %d\n", __LINE__));
/*
* Set up various chip parameters
*/
SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI /* | SBIC_CTL_HSP */
| dev->sc_dmamode);
/*
* don't allow (re)selection (SBIC_RID_ES)
* until we can handle target mode!!
*/
SET_SBIC_rselid(regs, SBIC_RID_ER);
SET_SBIC_syn(regs, 0); /* asynch for now */
/*
* anything else was zeroed by reset
*/
splx(s);
#if 0
if ((dev->sc_flags & SBICF_ALIVE) == 0) {
TAILQ_INIT(&dev->ready_list);
TAILQ_INIT(&dev->nexus_list);
TAILQ_INIT(&dev->free_list);
dev->sc_nexus = NULL;
acb = dev->sc_acb;
memset(acb, 0, sizeof(dev->sc_acb));
for (i = 0; i < sizeof(dev->sc_acb) / sizeof(*acb); i++) {
TAILQ_INSERT_TAIL(&dev->free_list, acb, chain);
acb++;
}
memset(dev->sc_tinfo, 0, sizeof(dev->sc_tinfo));
} else {
if (dev->sc_nexus != NULL) {
dev->sc_nexus->xs->error = XS_DRIVER_STUFFUP;
sbic_scsidone(dev->sc_nexus, dev->sc_stat[0]);
}
while (acb = dev->nexus_list.tqh_first) {
acb->xs->error = XS_DRIVER_STUFFUP;
sbic_scsidone(acb, -1 /*acb->stat[0]*/);
}
}
dev->sc_flags |= SBICF_ALIVE;
#endif
dev->sc_flags &= ~SBICF_SELECTED;
}
static void
sbicerror(struct sbic_softc *dev, sbic_regmap_p regs, u_char csr)
{
#ifdef DIAGNOSTIC
if (dev->sc_nexus == NULL)
panic("sbicerror");
#endif
if (dev->sc_nexus->xs->xs_control & XS_CTL_SILENT)
return;
printf("%s: ", device_xname(dev->sc_dev));
printf("csr == 0x%02x\n", csr); /* XXX */
}
/*
* select the bus, return when selected or error.
*/
static int
sbicselectbus(struct sbic_softc *dev, sbic_regmap_p regs, u_char target,
u_char lun, u_char our_addr)
{
u_char asr, csr, id;
SBIC_TRACE(dev);
QPRINTF(("sbicselectbus %d\n", target));
/*
* if we're already selected, return (XXXX panic maybe?)
*/
if (dev->sc_flags & SBICF_SELECTED) {
SBIC_TRACE(dev);
return 1;
}
/*
* issue select
*/
SBIC_TC_PUT(regs, 0);
SET_SBIC_selid(regs, target);
SET_SBIC_timeo(regs, SBIC_TIMEOUT(250,dev->sc_clkfreq));
/*
* set sync or async
*/
if (dev->sc_sync[target].state == SYNC_DONE)
SET_SBIC_syn(regs, SBIC_SYN (dev->sc_sync[target].offset,
dev->sc_sync[target].period));
else
SET_SBIC_syn(regs, SBIC_SYN (0, sbic_min_period));
GET_SBIC_asr(regs, asr);
if (asr & (SBIC_ASR_INT | SBIC_ASR_BSY)) {
/* This means we got ourselves reselected upon */
/* printf("sbicselectbus: INT/BSY asr %02x\n", asr);*/
#ifdef DDB
/* Debugger();*/
#endif
SBIC_TRACE(dev);
return 1;
}
SET_SBIC_cmd(regs, SBIC_CMD_SEL_ATN);
/*
* wait for select (merged from separate function may need
* cleanup)
*/
WAIT_CIP(regs);
do {
asr = SBIC_WAIT(regs, SBIC_ASR_INT | SBIC_ASR_LCI, 0);
if (asr & SBIC_ASR_LCI) {
DBGPRINTF(("sbicselectbus: late LCI asr %02x\n", asr),
reselect_debug);
SBIC_TRACE(dev);
return 1;
}
GET_SBIC_csr (regs, csr);
CSR_TRACE('s',csr,asr,target);
QPRINTF(("%02x ", csr));
if (csr == SBIC_CSR_RSLT_NI || csr == SBIC_CSR_RSLT_IFY) {
DBGPRINTF(("sbicselectbus: reselected asr %02x\n",
asr), reselect_debug);
/* We need to handle this now so we don't lock
up later */
sbicnextstate(dev, csr, asr);
SBIC_TRACE(dev);
return 1;
}
if (csr == SBIC_CSR_SLT || csr == SBIC_CSR_SLT_ATN) {
panic("sbicselectbus: target issued select!");
return 1;
}
} while (csr != (SBIC_CSR_MIS_2 | MESG_OUT_PHASE) &&
csr != (SBIC_CSR_MIS_2 | CMD_PHASE) &&
csr != SBIC_CSR_SEL_TIMEO);
/* Enable (or not) reselection */
if (!sbic_enable_reselect && dev->nexus_list.tqh_first == NULL)
SET_SBIC_rselid (regs, 0);
else
SET_SBIC_rselid (regs, SBIC_RID_ER);
if (csr == (SBIC_CSR_MIS_2 | CMD_PHASE)) {
dev->sc_flags |= SBICF_SELECTED; /* device ignored ATN */
GET_SBIC_selid(regs, id);
dev->target = id;
GET_SBIC_tlun(regs,dev->lun);
if (dev->lun & SBIC_TLUN_VALID)
dev->lun &= SBIC_TLUN_MASK;
else
dev->lun = lun;
} else if (csr == (SBIC_CSR_MIS_2 | MESG_OUT_PHASE)) {
/*
* Send identify message
* (SCSI-2 requires an identify msg (?))
*/
GET_SBIC_selid(regs, id);
dev->target = id;
GET_SBIC_tlun(regs,dev->lun);
if (dev->lun & SBIC_TLUN_VALID)
dev->lun &= SBIC_TLUN_MASK;
else
dev->lun = lun;
/*
* handle drives that don't want to be asked
* whether to go sync at all.
*/
if (sbic_inhibit_sync[id]
&& dev->sc_sync[id].state == SYNC_START) {
DBGPRINTF(("Forcing target %d asynchronous.\n", id),
sync_debug);
dev->sc_sync[id].offset = 0;
dev->sc_sync[id].period = sbic_min_period;
dev->sc_sync[id].state = SYNC_DONE;
}
if (dev->sc_sync[id].state != SYNC_START){
if ((dev->sc_nexus->xs->xs_control & XS_CTL_POLL)
|| (dev->sc_flags & SBICF_ICMD)
|| !sbic_enable_reselect)
SEND_BYTE(regs, MSG_IDENTIFY | lun);
else
SEND_BYTE(regs, MSG_IDENTIFY_DR | lun);
} else {
/*
* try to initiate a sync transfer.
* So compose the sync message we're going
* to send to the target
*/
DBGPRINTF(("Sending sync request to target %d ... ",
id), sync_debug);
/*
* setup scsi message sync message request
*/
dev->sc_msg[0] = MSG_IDENTIFY | lun;
dev->sc_msg[1] = MSG_EXT_MESSAGE;
dev->sc_msg[2] = 3;
dev->sc_msg[3] = MSG_SYNC_REQ;
dev->sc_msg[4] = sbictoscsiperiod(dev, regs,
sbic_min_period);
dev->sc_msg[5] = sbic_max_offset;
if (sbicxfstart(regs, 6, MESG_OUT_PHASE,
sbic_cmd_wait))
sbicxfout(regs, 6, dev->sc_msg,
MESG_OUT_PHASE);
dev->sc_sync[id].state = SYNC_SENT;
DBGPRINTF(("sent\n"), sync_debug);
}
asr = SBIC_WAIT (regs, SBIC_ASR_INT, 0);
GET_SBIC_csr (regs, csr);
CSR_TRACE('y',csr,asr,target);
QPRINTF(("[%02x]", csr));
DBGPRINTF(("csr-result of last msgout: 0x%x\n", csr),
sync_debug && dev->sc_sync[id].state == SYNC_SENT);
if (csr != SBIC_CSR_SEL_TIMEO)
dev->sc_flags |= SBICF_SELECTED;
}
if (csr == SBIC_CSR_SEL_TIMEO)
dev->sc_nexus->xs->error = XS_SELTIMEOUT;
QPRINTF(("\n"));
SBIC_TRACE(dev);
return csr == SBIC_CSR_SEL_TIMEO;
}
static int
sbicxfstart(sbic_regmap_p regs, int len, u_char phase, int wait)
{
u_char id;
switch (phase) {
case DATA_IN_PHASE:
case MESG_IN_PHASE:
GET_SBIC_selid (regs, id);
id |= SBIC_SID_FROM_SCSI;
SET_SBIC_selid (regs, id);
SBIC_TC_PUT (regs, (unsigned)len);
break;
case DATA_OUT_PHASE:
case MESG_OUT_PHASE:
case CMD_PHASE:
GET_SBIC_selid (regs, id);
id &= ~SBIC_SID_FROM_SCSI;
SET_SBIC_selid (regs, id);
SBIC_TC_PUT (regs, (unsigned)len);
break;
default:
SBIC_TC_PUT (regs, 0);
}
QPRINTF(("sbicxfstart %d, %d, %d\n", len, phase, wait));
return 1;
}
static int
sbicxfout(sbic_regmap_p regs, int len, void *bp, int phase)
{
#ifdef UNPROTECTED_CSR
u_char orig_csr
#endif
u_char asr, *buf;
/* u_char csr;*/
int wait;
buf = bp;
wait = sbic_data_wait;
QPRINTF(("sbicxfout {%d} %02x %02x %02x %02x %02x "
"%02x %02x %02x %02x %02x\n", len, buf[0], buf[1], buf[2],
buf[3], buf[4], buf[5], buf[6], buf[7], buf[8], buf[9]));
#ifdef UNPROTECTED_CSR
GET_SBIC_csr (regs, orig_csr);
CSR_TRACE('>',orig_csr,0,0);
#endif
/*
* sigh.. WD-PROTO strikes again.. sending the command in one go
* causes the chip to lock up if talking to certain (misbehaving?)
* targets. Anyway, this procedure should work for all targets, but
* it's slightly slower due to the overhead
*/
WAIT_CIP (regs);
SET_SBIC_cmd (regs, SBIC_CMD_XFER_INFO);
for (;len > 0; len--) {
GET_SBIC_asr (regs, asr);
while ((asr & SBIC_ASR_DBR) == 0) {
if ((asr & SBIC_ASR_INT) || --wait < 0) {
DBGPRINTF(("sbicxfout fail: l%d i%x w%d\n",
len, asr, wait), sbic_debug);
return len;
}
/* DELAY(1);*/
GET_SBIC_asr (regs, asr);
}
SET_SBIC_data (regs, *buf);
buf++;
}
SBIC_TC_GET(regs, len);
QPRINTF(("sbicxfout done %d bytes\n", len));
/*
* this leaves with one csr to be read
*/
return 0;
}
/* returns # bytes left to read */
static int
sbicxfin(sbic_regmap_p regs, int len, void *bp)
{
int wait;
/* int read;*/
u_char *obp, *buf;
#ifdef UNPROTECTED_CSR
u_char orig_csr, csr;
#endif
u_char asr;
wait = sbic_data_wait;
obp = bp;
buf = bp;
#ifdef UNPROTECTED_CSR
GET_SBIC_csr (regs, orig_csr);
CSR_TRACE('<',orig_csr,0,0);
QPRINTF(("sbicxfin %d, csr=%02x\n", len, orig_csr));
#endif
WAIT_CIP (regs);
SET_SBIC_cmd (regs, SBIC_CMD_XFER_INFO);
for (;len > 0; len--) {
GET_SBIC_asr (regs, asr);
if ((asr & SBIC_ASR_PE)) {
DBG(printf("sbicxfin parity error: l%d i%x w%d\n",
len, asr, wait));
#if defined(DDB) && defined(DEBUG)
Debugger();
#endif
DBG(return ((unsigned long)buf - (unsigned long)bp));
}
while ((asr & SBIC_ASR_DBR) == 0) {
if ((asr & SBIC_ASR_INT) || --wait < 0) {
DBG(if (sbic_debug) {
QPRINTF(("sbicxfin fail:{%d} %02x %02x %02x %02x %02x %02x "
"%02x %02x %02x %02x\n", len, obp[0], obp[1], obp[2],
obp[3], obp[4], obp[5], obp[6], obp[7], obp[8], obp[9]));
printf("sbicxfin fail: l%d i%x w%d\n", len, asr, wait); });
return len;
}
#ifdef UNPROTECTED_CSR
if (!(asr & SBIC_ASR_BSY)) {
GET_SBIC_csr(regs, csr);
CSR_TRACE('<',csr,asr,len);
QPRINTF(("[CSR%02xASR%02x]", csr, asr));
}
#endif
/* DELAY(1);*/
GET_SBIC_asr (regs, asr);
}
GET_SBIC_data (regs, *buf);
/* QPRINTF(("asr=%02x, csr=%02x, data=%02x\n", asr, csr, *buf));*/
buf++;
}
QPRINTF(("sbicxfin {%d} %02x %02x %02x %02x %02x %02x "
"%02x %02x %02x %02x\n", len, obp[0], obp[1], obp[2],
obp[3], obp[4], obp[5], obp[6], obp[7], obp[8], obp[9]));
/* this leaves with one csr to be read */
return len;
}
/*
* SCSI 'immediate' command: issue a command to some SCSI device
* and get back an 'immediate' response (i.e., do programmed xfer
* to get the response data). 'cbuf' is a buffer containing a scsi
* command of length clen bytes. 'buf' is a buffer of length 'len'
* bytes for data. The transfer direction is determined by the device
* (i.e., by the scsi bus data xfer phase). If 'len' is zero, the
* command must supply no data.
*/
static int
sbicicmd(struct sbic_softc *dev, int target, int lun, struct sbic_acb *acb)
{
sbic_regmap_p regs;
u_char phase, csr, asr;
int wait;
/* int newtarget, cmd_sent, parity_err;*/
/* int discon;*/
int i;
void *cbuf, *buf;
int clen, len;
#define CSR_LOG_BUF_SIZE 0
#if CSR_LOG_BUF_SIZE
int bufptr;
int csrbuf[CSR_LOG_BUF_SIZE];
bufptr = 0;
#endif
cbuf = &acb->cmd;
clen = acb->clen;
buf = acb->data;
len = acb->datalen;
SBIC_TRACE(dev);
regs = &dev->sc_sbicp;
acb->sc_tcnt = 0;
DBG(routine = 3);
DBG(debug_sbic_regs = regs); /* store this to allow debug calls */
DBGPRINTF(("sbicicmd(%d,%d):%d\n", target, lun, len),
data_pointer_debug > 1);
/*
* set the sbic into non-DMA mode
*/
SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI /*| SBIC_CTL_HSP*/);
dev->sc_stat[0] = 0xff;
dev->sc_msg[0] = 0xff;
i = 1; /* pre-load */
/* We're stealing the SCSI bus */
dev->sc_flags |= SBICF_ICMD;
do {
/*
* select the SCSI bus (it's an error if bus isn't free)
*/
if (!(dev->sc_flags & SBICF_SELECTED)
&& sbicselectbus(dev, regs, target, lun,
dev->sc_scsiaddr)) {
/*printf("sbicicmd trying to select busy bus!\n");*/
dev->sc_flags &= ~SBICF_ICMD;
return -1;
}
/*
* Wait for a phase change (or error) then let the
* device sequence us through the various SCSI phases.
*/
wait = sbic_cmd_wait;
GET_SBIC_asr (regs, asr);
GET_SBIC_csr (regs, csr);
CSR_TRACE('I',csr,asr,target);
QPRINTF((">ASR:%02xCSR:%02x<", asr, csr));
#if CSR_LOG_BUF_SIZE
csrbuf[bufptr++] = csr;
#endif
switch (csr) {
case SBIC_CSR_S_XFERRED:
case SBIC_CSR_DISC:
case SBIC_CSR_DISC_1:
dev->sc_flags &= ~SBICF_SELECTED;
GET_SBIC_cmd_phase (regs, phase);
if (phase == 0x60) {
GET_SBIC_tlun (regs, dev->sc_stat[0]);
i = 0; /* done */
/* break;*/ /* Bypass all the state gobldygook */
} else {
DBGPRINTF(("sbicicmd: handling disconnect\n"),
reselect_debug > 1);
i = SBIC_STATE_DISCONNECT;
}
break;
case SBIC_CSR_XFERRED | CMD_PHASE:
case SBIC_CSR_MIS | CMD_PHASE:
case SBIC_CSR_MIS_1 | CMD_PHASE:
case SBIC_CSR_MIS_2 | CMD_PHASE:
if (sbicxfstart(regs, clen, CMD_PHASE, sbic_cmd_wait))
if (sbicxfout(regs, clen,
cbuf, CMD_PHASE))
i = sbicabort(dev, regs,
"icmd sending cmd");
#if 0
GET_SBIC_csr(regs, csr); /* Lets us reload tcount */
WAIT_CIP(regs);
GET_SBIC_asr(regs, asr);
CSR_TRACE('I',csr,asr,target);
if (asr & (SBIC_ASR_BSY | SBIC_ASR_LCI | SBIC_ASR_CIP))
printf("next: cmd sent asr %02x, csr %02x\n",
asr, csr);
#endif
break;
#if 0
case SBIC_CSR_XFERRED | DATA_OUT_PHASE:
case SBIC_CSR_XFERRED | DATA_IN_PHASE:
case SBIC_CSR_MIS | DATA_OUT_PHASE:
case SBIC_CSR_MIS | DATA_IN_PHASE:
case SBIC_CSR_MIS_1 | DATA_OUT_PHASE:
case SBIC_CSR_MIS_1 | DATA_IN_PHASE:
case SBIC_CSR_MIS_2 | DATA_OUT_PHASE:
case SBIC_CSR_MIS_2 | DATA_IN_PHASE:
if (acb->datalen <= 0)
i = sbicabort(dev, regs, "icmd out of data");
else {
wait = sbic_data_wait;
if (sbicxfstart(regs, acb->datalen,
SBIC_PHASE(csr), wait))
if (csr & 0x01)
/* data in? */
i = sbicxfin(regs, acb->datalen, acb->data);
else
i = sbicxfout(regs, acb->datalen, acb->data,
SBIC_PHASE(csr));
acb->data += acb->datalen - i;
acb->datalen = i;
i = 1;
}
break;
#endif
case SBIC_CSR_XFERRED | STATUS_PHASE:
case SBIC_CSR_MIS | STATUS_PHASE:
case SBIC_CSR_MIS_1 | STATUS_PHASE:
case SBIC_CSR_MIS_2 | STATUS_PHASE:
/*
* the sbic does the status/cmd-complete reading ok,
* so do this with its hi-level commands.
*/
DBGPRINTF(("SBICICMD status phase\n"), sbic_debug);
SBIC_TC_PUT(regs, 0);
SET_SBIC_cmd_phase(regs, 0x46);
SET_SBIC_cmd(regs, SBIC_CMD_SEL_ATN_XFER);
break;
#if THIS_IS_A_RESERVED_STATE
case BUS_FREE_PHASE: /* This is not legal */
if (dev->sc_stat[0] != 0xff)
goto out;
break;
#endif
default:
i = sbicnextstate(dev, csr, asr);
}
/*
* make sure the last command was taken,
* ie. we're not hunting after an ignored command..
*/
GET_SBIC_asr(regs, asr);
/* tapes may take a loooong time.. */
while (asr & SBIC_ASR_BSY){
if (asr & SBIC_ASR_DBR) {
printf("sbicicmd: Waiting while sbic is "
"jammed, CSR:%02x,ASR:%02x\n",
csr, asr);
#ifdef DDB
Debugger();
#endif
/* SBIC is jammed */
/* DUNNO which direction */
/* Try old direction */
GET_SBIC_data(regs,i);
GET_SBIC_asr(regs, asr);
if (asr & SBIC_ASR_DBR) /* Wants us to write */
SET_SBIC_data(regs,i);
}
GET_SBIC_asr(regs, asr);
}
/*
* wait for last command to complete
*/
if (asr & SBIC_ASR_LCI) {
printf("sbicicmd: last command ignored\n");
}
else if (i == 1) /* Bsy */
SBIC_WAIT(regs, SBIC_ASR_INT, wait);
/*
* do it again
*/
} while (i > 0 && dev->sc_stat[0] == 0xff);
/* Sometimes we need to do an extra read of the CSR */
GET_SBIC_csr(regs, csr);
CSR_TRACE('I',csr,asr,0xff);
#if CSR_LOG_BUF_SIZE
if (reselect_debug > 1)
for (i = 0; i < bufptr; i++)
printf("CSR:%02x", csrbuf[i]);
#endif
DBGPRINTF(("sbicicmd done(%d,%d):%d =%d=\n",
dev->target, lun,
acb->datalen,
dev->sc_stat[0]),
data_pointer_debug > 1);
QPRINTF(("=STS:%02x=", dev->sc_stat[0]));
dev->sc_flags &= ~SBICF_ICMD;
SBIC_TRACE(dev);
return dev->sc_stat[0];
}
/*
* Finish SCSI xfer command: After the completion interrupt from
* a read/write operation, sequence through the final phases in
* programmed i/o. This routine is a lot like sbicicmd except we
* skip (and don't allow) the select, cmd out and data in/out phases.
*/
static void
sbicxfdone(struct sbic_softc *dev, sbic_regmap_p regs, int target)
{
u_char phase, asr, csr;
int s;
SBIC_TRACE(dev);
QPRINTF(("{"));
s = splbio();
/*
* have the sbic complete on its own
*/
SBIC_TC_PUT(regs, 0);
SET_SBIC_cmd_phase(regs, 0x46);
SET_SBIC_cmd(regs, SBIC_CMD_SEL_ATN_XFER);
do {
asr = SBIC_WAIT (regs, SBIC_ASR_INT, 0);
GET_SBIC_csr (regs, csr);
CSR_TRACE('f',csr,asr,target);
QPRINTF(("%02x:", csr));
} while ((csr != SBIC_CSR_DISC) && (csr != SBIC_CSR_DISC_1)
&& (csr != SBIC_CSR_S_XFERRED));
dev->sc_flags &= ~SBICF_SELECTED;
GET_SBIC_cmd_phase (regs, phase);
QPRINTF(("}%02x", phase));
if (phase == 0x60)
GET_SBIC_tlun(regs, dev->sc_stat[0]);
else
sbicerror(dev, regs, csr);
QPRINTF(("=STS:%02x=\n", dev->sc_stat[0]));
splx(s);
SBIC_TRACE(dev);
}
/*
* No DMA chains
*/
static int
sbicgo(struct sbic_softc *dev, struct scsipi_xfer *xs)
{
int i, usedma;
/* int dmaflags, count; */
/* int wait;*/
/* u_char cmd;*/
u_char asr = 0, csr = 0;
/* u_char *addr; */
sbic_regmap_p regs;
struct sbic_acb *acb;
SBIC_TRACE(dev);
dev->target = xs->xs_periph->periph_target;
dev->lun = xs->xs_periph->periph_lun;
acb = dev->sc_nexus;
regs = &dev->sc_sbicp;
usedma = acb->flags & ACB_DMA;
DBG(routine = 1);
DBG(debug_sbic_regs = regs); /* store this to allow debug calls */
DBGPRINTF(("sbicgo(%d,%d)\n", dev->target, dev->lun),
data_pointer_debug > 1);
/*
* set the sbic into DMA mode
*/
if (usedma)
SET_SBIC_control(regs,
SBIC_CTL_EDI | SBIC_CTL_IDI | dev->sc_dmamode);
else
SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI);
/*
* select the SCSI bus (it's an error if bus isn't free)
*/
if (sbicselectbus(dev, regs, dev->target, dev->lun,
dev->sc_scsiaddr)) {
/* printf("sbicgo: Trying to select busy bus!\n"); */
SBIC_TRACE(dev);
/* Not done: may need to be rescheduled */
return 0;
}
dev->sc_stat[0] = 0xff;
/*
* Allocate the DMA chain
*/
/* Mark end of segment */
acb->sc_tcnt = 0;
SBIC_TRACE(dev);
/* Enable interrupts */
dev->sc_enintr(dev);
if (usedma) {
int tcnt;
acb->offset = 0;
acb->sc_tcnt = 0;
/* Note, this does not start DMA */
tcnt = dev->sc_dmasetup(dev->sc_dmah, dev->sc_dmat, acb,
(acb->flags & ACB_DATAIN) != 0);
DBG(dev->sc_dmatimo = tcnt ? 1 : 0);
DBG(++sbicdma_ops); /* count total DMA operations */
}
SBIC_TRACE(dev);
/*
* enintr() also enables interrupts for the sbic
*/
DBG(debug_asr = asr);
DBG(debug_csr = csr);
/*
* Lets cycle a while then let the interrupt handler take over
*/
GET_SBIC_asr(regs, asr);
do {
GET_SBIC_csr(regs, csr);
CSR_TRACE('g', csr, asr, dev->target);
DBG(debug_csr = csr);
DBG(routine = 1);
QPRINTF(("go[0x%x]", csr));
i = sbicnextstate(dev, csr, asr);
WAIT_CIP(regs);
GET_SBIC_asr(regs, asr);
DBG(debug_asr = asr);
if (asr & SBIC_ASR_LCI)
printf("sbicgo: LCI asr:%02x csr:%02x\n", asr, csr);
} while (i == SBIC_STATE_RUNNING &&
(asr & (SBIC_ASR_INT | SBIC_ASR_LCI)));
CSR_TRACE('g',csr,asr,i<<4);
SBIC_TRACE(dev);
if (i == SBIC_STATE_DONE && dev->sc_stat[0] == 0xff)
printf("sbicgo: done & stat = 0xff\n");
if (i == SBIC_STATE_DONE && dev->sc_stat[0] != 0xff) {
/* if (i == SBIC_STATE_DONE && dev->sc_stat[0]) { */
/* Did we really finish that fast? */
return 1;
}
return 0;
}
int
sbicintr(struct sbic_softc *dev)
{
sbic_regmap_p regs;
u_char asr, csr;
/* u_char *tmpaddr;*/
/* struct sbic_acb *acb;*/
int i;
/* int newtarget, newlun;*/
/* unsigned tcnt;*/
regs = &dev->sc_sbicp;
/*
* pending interrupt?
*/
GET_SBIC_asr (regs, asr);
if ((asr & SBIC_ASR_INT) == 0)
return 0;
SBIC_TRACE(dev);
do {
GET_SBIC_csr(regs, csr);
CSR_TRACE('i',csr,asr,dev->target);
DBG(debug_csr = csr);
DBG(routine = 2);
QPRINTF(("intr[0x%x]", csr));
i = sbicnextstate(dev, csr, asr);
WAIT_CIP(regs);
GET_SBIC_asr(regs, asr);
DBG(debug_asr = asr);
#if 0
if (asr & SBIC_ASR_LCI)
printf("sbicintr: LCI asr:%02x csr:%02x\n", asr, csr);
#endif
} while (i == SBIC_STATE_RUNNING &&
(asr & (SBIC_ASR_INT | SBIC_ASR_LCI)));
CSR_TRACE('i', csr, asr, i << 4);
SBIC_TRACE(dev);
return 1;
}
/*
* Run commands and wait for disconnect
*/
static int
sbicpoll(struct sbic_softc *dev)
{
sbic_regmap_p regs;
u_char asr, csr;
/* struct sbic_pending* pendp;*/
int i;
/* unsigned tcnt;*/
SBIC_TRACE(dev);
regs = &dev->sc_sbicp;
do {
GET_SBIC_asr (regs, asr);
DBG(debug_asr = asr);
GET_SBIC_csr(regs, csr);
CSR_TRACE('p', csr, asr, dev->target);
DBG(debug_csr = csr);
DBG(routine = 2);
QPRINTF(("poll[0x%x]", csr));
i = sbicnextstate(dev, csr, asr);
WAIT_CIP(regs);
GET_SBIC_asr(regs, asr);
/* tapes may take a loooong time.. */
while (asr & SBIC_ASR_BSY){
if (asr & SBIC_ASR_DBR) {
printf("sbipoll: Waiting while sbic is "
"jammed, CSR:%02x,ASR:%02x\n",
csr, asr);
#ifdef DDB
Debugger();
#endif
/* SBIC is jammed */
/* DUNNO which direction */
/* Try old direction */
GET_SBIC_data(regs,i);
GET_SBIC_asr(regs, asr);
if (asr & SBIC_ASR_DBR) /* Wants us to write */
SET_SBIC_data(regs,i);
}
GET_SBIC_asr(regs, asr);
}
if (asr & SBIC_ASR_LCI)
printf("sbicpoll: LCI asr:%02x csr:%02x\n", asr, csr);
else if (i == 1) /* BSY */
SBIC_WAIT(regs, SBIC_ASR_INT, sbic_cmd_wait);
} while (i == SBIC_STATE_RUNNING);
CSR_TRACE('p', csr, asr, i << 4);
SBIC_TRACE(dev);
return 1;
}
/*
* Handle a single msgin
*/
static int
sbicmsgin(struct sbic_softc *dev)
{
sbic_regmap_p regs;
int recvlen;
u_char asr, csr, *tmpaddr;
regs = &dev->sc_sbicp;
dev->sc_msg[0] = 0xff;
dev->sc_msg[1] = 0xff;
GET_SBIC_asr(regs, asr);
DBGPRINTF(("sbicmsgin asr=%02x\n", asr), reselect_debug > 1);
sbic_save_ptrs(dev, regs);
GET_SBIC_selid (regs, csr);
SET_SBIC_selid (regs, csr | SBIC_SID_FROM_SCSI);
SBIC_TC_PUT(regs, 0);
tmpaddr = dev->sc_msg;
recvlen = 1;
do {
while (recvlen--) {
GET_SBIC_asr(regs, asr);
GET_SBIC_csr(regs, csr);
QPRINTF(("sbicmsgin ready to go (csr,asr)=(%02x,%02x)\n",
csr, asr));
RECV_BYTE(regs, *tmpaddr);
CSR_TRACE('m', csr, asr, *tmpaddr);
#if 1
/*
* get the command completion interrupt, or we
* can't send a new command (LCI)
*/
SBIC_WAIT(regs, SBIC_ASR_INT, 0);
GET_SBIC_csr(regs, csr);
CSR_TRACE('X', csr, asr, dev->target);
#else
WAIT_CIP(regs);
do {
GET_SBIC_asr(regs, asr);
csr = 0xff;
GET_SBIC_csr(regs, csr);
CSR_TRACE('X', csr, asr, dev->target);
if (csr == 0xff)
printf("sbicmsgin waiting: csr %02x "
"asr %02x\n", csr, asr);
} while (csr == 0xff);
#endif
DBGPRINTF(("sbicmsgin: got %02x csr %02x asr %02x\n",
*tmpaddr, csr, asr), reselect_debug > 1);
#if do_parity_check
if (asr & SBIC_ASR_PE) {
printf("Parity error");
/* This code simply does not work. */
WAIT_CIP(regs);
SET_SBIC_cmd(regs, SBIC_CMD_SET_ATN);
WAIT_CIP(regs);
GET_SBIC_asr(regs, asr);
WAIT_CIP(regs);
SET_SBIC_cmd(regs, SBIC_CMD_CLR_ACK);
WAIT_CIP(regs);
if (!(asr & SBIC_ASR_LCI))
/* Target wants to send garbled msg*/
continue;
printf("--fixing\n");
/* loop until a msgout phase occurs on
target */
while ((csr & 0x07) != MESG_OUT_PHASE) {
while ((asr & SBIC_ASR_BSY) &&
!(asr &
(SBIC_ASR_DBR | SBIC_ASR_INT)))
GET_SBIC_asr(regs, asr);
if (asr & SBIC_ASR_DBR)
panic("msgin: jammed again!");
GET_SBIC_csr(regs, csr);
CSR_TRACE('e', csr, asr, dev->target);
if ((csr & 0x07) != MESG_OUT_PHASE) {
sbicnextstate(dev, csr, asr);
sbic_save_ptrs(dev, regs);
}
}
/* Should be msg out by now */
SEND_BYTE(regs, MSG_PARITY_ERROR);
}
else
#endif
tmpaddr++;
if (recvlen) {
/* Clear ACK */
WAIT_CIP(regs);
GET_SBIC_asr(regs, asr);
GET_SBIC_csr(regs, csr);
CSR_TRACE('X',csr,asr,dev->target);
QPRINTF(("sbicmsgin pre byte CLR_ACK (csr,asr)=(%02x,%02x)\n",
csr, asr));
SET_SBIC_cmd(regs, SBIC_CMD_CLR_ACK);
SBIC_WAIT(regs, SBIC_ASR_INT, 0);
}
};
if (dev->sc_msg[0] == 0xff) {
printf("sbicmsgin: sbic swallowed our message\n");
break;
}
DBGPRINTF(("msgin done csr 0x%x asr 0x%x msg 0x%x\n",
csr, asr, dev->sc_msg[0]), sync_debug);
/*
* test whether this is a reply to our sync
* request
*/
if (MSG_ISIDENTIFY(dev->sc_msg[0])) {
QPRINTF(("IFFY"));
/* Got IFFY msg -- ack it */
} else if (dev->sc_msg[0] == MSG_REJECT
&& dev->sc_sync[dev->target].state == SYNC_SENT) {
QPRINTF(("REJECT of SYN"));
DBGPRINTF(("target %d rejected sync, going async\n",
dev->target), sync_debug);
dev->sc_sync[dev->target].period = sbic_min_period;
dev->sc_sync[dev->target].offset = 0;
dev->sc_sync[dev->target].state = SYNC_DONE;
SET_SBIC_syn(regs,
SBIC_SYN(dev->sc_sync[dev->target].offset,
dev->sc_sync[dev->target].period));
} else if ((dev->sc_msg[0] == MSG_REJECT)) {
QPRINTF(("REJECT"));
/*
* we'll never REJECt a REJECT message..
*/
} else if ((dev->sc_msg[0] == MSG_SAVE_DATA_PTR)) {
QPRINTF(("MSG_SAVE_DATA_PTR"));
/*
* don't reject this either.
*/
} else if ((dev->sc_msg[0] == MSG_DISCONNECT)) {
QPRINTF(("DISCONNECT"));
DBGPRINTF(("sbicmsgin: got disconnect msg %s\n",
(dev->sc_flags & SBICF_ICMD) ? "rejecting" : ""),
reselect_debug > 1 &&
dev->sc_msg[0] == MSG_DISCONNECT);
if (dev->sc_flags & SBICF_ICMD) {
/* We're in immediate mode. Prevent
disconnects. */
/* prepare to reject the message, NACK */
SET_SBIC_cmd(regs, SBIC_CMD_SET_ATN);
WAIT_CIP(regs);
}
} else if (dev->sc_msg[0] == MSG_CMD_COMPLETE) {
QPRINTF(("CMD_COMPLETE"));
/* !! KLUDGE ALERT !! quite a few drives don't seem to
* really like the current way of sending the
* sync-handshake together with the ident-message, and
* they react by sending command-complete and
* disconnecting right after returning the valid sync
* handshake. So, all I can do is reselect the drive,
* and hope it won't disconnect again. I don't think
* this is valid behavior, but I can't help fixing a
* problem that apparently exists.
*
* Note: we should not get here on `normal' command
* completion, as that condition is handled by the
* high-level sel&xfer resume command used to walk
* thru status/cc-phase.
*/
DBGPRINTF(("GOT MSG %d! target %d acting weird.."
" waiting for disconnect...\n",
dev->sc_msg[0], dev->target), sync_debug);
/* Check to see if sbic is handling this */
GET_SBIC_asr(regs, asr);
if (asr & SBIC_ASR_BSY)
return SBIC_STATE_RUNNING;
/* Let's try this: Assume it works and set
status to 00 */
dev->sc_stat[0] = 0;
} else if (dev->sc_msg[0] == MSG_EXT_MESSAGE
&& tmpaddr == &dev->sc_msg[1]) {
QPRINTF(("ExtMSG\n"));
/* Read in whole extended message */
SET_SBIC_cmd(regs, SBIC_CMD_CLR_ACK);
SBIC_WAIT(regs, SBIC_ASR_INT, 0);
GET_SBIC_asr(regs, asr);
GET_SBIC_csr(regs, csr);
QPRINTF(("CLR ACK asr %02x, csr %02x\n", asr, csr));
RECV_BYTE(regs, *tmpaddr);
CSR_TRACE('x',csr,asr,*tmpaddr);
/* Wait for command completion IRQ */
SBIC_WAIT(regs, SBIC_ASR_INT, 0);
recvlen = *tmpaddr++;
QPRINTF(("Recving ext msg, asr %02x csr %02x len %02x\n",
asr, csr, recvlen));
} else if (dev->sc_msg[0] == MSG_EXT_MESSAGE &&
dev->sc_msg[1] == 3 &&
dev->sc_msg[2] == MSG_SYNC_REQ) {
QPRINTF(("SYN"));
dev->sc_sync[dev->target].period =
sbicfromscsiperiod(dev,
regs, dev->sc_msg[3]);
dev->sc_sync[dev->target].offset = dev->sc_msg[4];
dev->sc_sync[dev->target].state = SYNC_DONE;
SET_SBIC_syn(regs,
SBIC_SYN(dev->sc_sync[dev->target].offset,
dev->sc_sync[dev->target].period));
printf("%s: target %d now synchronous,"
" period=%dns, offset=%d.\n",
device_xname(dev->sc_dev), dev->target,
dev->sc_msg[3] * 4, dev->sc_msg[4]);
} else {
DBGPRINTF(("sbicmsgin: Rejecting message 0x%02x\n",
dev->sc_msg[0]), sbic_debug || sync_debug);
/* prepare to reject the message, NACK */
SET_SBIC_cmd(regs, SBIC_CMD_SET_ATN);
WAIT_CIP(regs);
}
/* Clear ACK */
WAIT_CIP(regs);
GET_SBIC_asr(regs, asr);
GET_SBIC_csr(regs, csr);
CSR_TRACE('X',csr,asr,dev->target);
QPRINTF(("sbicmsgin pre CLR_ACK (csr,asr)=(%02x,%02x)%d\n",
csr, asr, recvlen));
SET_SBIC_cmd(regs, SBIC_CMD_CLR_ACK);
SBIC_WAIT(regs, SBIC_ASR_INT, 0);
}
#if 0
while ((csr == SBIC_CSR_MSGIN_W_ACK) ||
(SBIC_PHASE(csr) == MESG_IN_PHASE));
#else
while (recvlen > 0);
#endif
QPRINTF(("sbicmsgin finished: csr %02x, asr %02x\n",csr, asr));
/* Should still have one CSR to read */
return SBIC_STATE_RUNNING;
}
/*
* sbicnextstate()
* return:
* 0 == done
* 1 == working
* 2 == disconnected
* -1 == error
*/
static int
sbicnextstate(struct sbic_softc *dev, u_char csr, u_char asr)
{
sbic_regmap_p regs;
struct sbic_acb *acb;
/* int i;*/
int newtarget, newlun, wait;
/* unsigned tcnt;*/
SBIC_TRACE(dev);
regs = &dev->sc_sbicp;
acb = dev->sc_nexus;
QPRINTF(("next[%02x,%02x]",asr,csr));
switch (csr) {
case SBIC_CSR_XFERRED | CMD_PHASE:
case SBIC_CSR_MIS | CMD_PHASE:
case SBIC_CSR_MIS_1 | CMD_PHASE:
case SBIC_CSR_MIS_2 | CMD_PHASE:
sbic_save_ptrs(dev, regs);
if (sbicxfstart(regs, acb->clen, CMD_PHASE, sbic_cmd_wait))
if (sbicxfout(regs, acb->clen,
&acb->cmd, CMD_PHASE))
goto abort;
break;
case SBIC_CSR_XFERRED | STATUS_PHASE:
case SBIC_CSR_MIS | STATUS_PHASE:
case SBIC_CSR_MIS_1 | STATUS_PHASE:
case SBIC_CSR_MIS_2 | STATUS_PHASE:
/*
* this should be the normal i/o completion case.
* get the status & cmd complete msg then let the
* device driver look at what happened.
*/
sbicxfdone(dev,regs,dev->target);
if (acb->flags & ACB_DMA) {
DBG(dev->sc_dmatimo = 0);
dev->sc_dmafinish(dev->sc_dmah, dev->sc_dmat, acb);
dev->sc_flags &= ~SBICF_INDMA;
}
sbic_scsidone(acb, dev->sc_stat[0]);
SBIC_TRACE(dev);
return SBIC_STATE_DONE;
case SBIC_CSR_XFERRED | DATA_OUT_PHASE:
case SBIC_CSR_XFERRED | DATA_IN_PHASE:
case SBIC_CSR_MIS | DATA_OUT_PHASE:
case SBIC_CSR_MIS | DATA_IN_PHASE:
case SBIC_CSR_MIS_1 | DATA_OUT_PHASE:
case SBIC_CSR_MIS_1 | DATA_IN_PHASE:
case SBIC_CSR_MIS_2 | DATA_OUT_PHASE:
case SBIC_CSR_MIS_2 | DATA_IN_PHASE:
{
int i = 0;
if ((acb->xs->xs_control & XS_CTL_POLL) ||
(dev->sc_flags & SBICF_ICMD) ||
(acb->flags & ACB_DMA) == 0) {
/* Do PIO */
SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI);
if (acb->datalen <= 0) {
printf("sbicnextstate:xfer count %d asr%x csr%x\n",
acb->datalen, asr, csr);
goto abort;
}
wait = sbic_data_wait;
if (sbicxfstart(regs, acb->datalen,
SBIC_PHASE(csr), wait)) {
if (SBIC_PHASE(csr) == DATA_IN_PHASE)
/* data in? */
i = sbicxfin(regs, acb->datalen,
acb->data);
else
i = sbicxfout(regs, acb->datalen,
acb->data, SBIC_PHASE(csr));
}
acb->data += acb->datalen - i;
acb->datalen = i;
} else {
/* Transfer = using DMA */
/*
* do scatter-gather dma
* hacking the controller chip, ouch..
*/
SET_SBIC_control(regs,
SBIC_CTL_EDI | SBIC_CTL_IDI | dev->sc_dmamode);
/*
* set next dma addr and dec count
*/
sbic_save_ptrs(dev, regs);
if (acb->offset >= acb->datalen) {
printf("sbicnextstate:xfer offset %d asr%x csr%x\n",
acb->offset, asr, csr);
goto abort;
}
DBGPRINTF(("next dmanext: %d(offset %d)\n",
dev->target, acb->offset),
data_pointer_debug > 1);
DBG(dev->sc_dmatimo = 1);
acb->sc_tcnt =
dev->sc_dmanext(dev->sc_dmah, dev->sc_dmat,
acb, acb->offset);
DBGPRINTF(("dmanext transfering %ld bytes\n",
acb->sc_tcnt), data_pointer_debug);
SBIC_TC_PUT(regs, (unsigned)acb->sc_tcnt);
SET_SBIC_cmd(regs, SBIC_CMD_XFER_INFO);
dev->sc_flags |= SBICF_INDMA;
}
break;
}
case SBIC_CSR_XFERRED | MESG_IN_PHASE:
case SBIC_CSR_MIS | MESG_IN_PHASE:
case SBIC_CSR_MIS_1 | MESG_IN_PHASE:
case SBIC_CSR_MIS_2 | MESG_IN_PHASE:
SBIC_TRACE(dev);
return sbicmsgin(dev);
case SBIC_CSR_MSGIN_W_ACK:
/* Dunno what I'm ACKing */
SET_SBIC_cmd(regs, SBIC_CMD_CLR_ACK);
printf("Acking unknown msgin CSR:%02x",csr);
break;
case SBIC_CSR_XFERRED | MESG_OUT_PHASE:
case SBIC_CSR_MIS | MESG_OUT_PHASE:
case SBIC_CSR_MIS_1 | MESG_OUT_PHASE:
case SBIC_CSR_MIS_2 | MESG_OUT_PHASE:
DBGPRINTF(("sending REJECT msg to last msg.\n"), sync_debug);
sbic_save_ptrs(dev, regs);
/*
* Should only get here on reject, since it's always
* US that initiate a sync transfer.
*/
SEND_BYTE(regs, MSG_REJECT);
WAIT_CIP(regs);
if (asr & (SBIC_ASR_BSY | SBIC_ASR_LCI | SBIC_ASR_CIP))
printf("next: REJECT sent asr %02x\n", asr);
SBIC_TRACE(dev);
return SBIC_STATE_RUNNING;
case SBIC_CSR_DISC:
case SBIC_CSR_DISC_1:
dev->sc_flags &= ~(SBICF_INDMA | SBICF_SELECTED);
/* Try to schedule another target */
DBGPRINTF(("sbicnext target %d disconnected\n", dev->target),
reselect_debug > 1);
TAILQ_INSERT_HEAD(&dev->nexus_list, acb, chain);
++dev->sc_tinfo[dev->target].dconns;
dev->sc_nexus = NULL;
if ((acb->xs->xs_control & XS_CTL_POLL)
|| (dev->sc_flags & SBICF_ICMD)
|| (!sbic_parallel_operations)) {
SBIC_TRACE(dev);
return SBIC_STATE_DISCONNECT;
}
sbic_sched(dev);
SBIC_TRACE(dev);
return SBIC_STATE_DISCONNECT;
case SBIC_CSR_RSLT_NI:
case SBIC_CSR_RSLT_IFY:
GET_SBIC_rselid(regs, newtarget);
/* check SBIC_RID_SIV? */
newtarget &= SBIC_RID_MASK;
if (csr == SBIC_CSR_RSLT_IFY) {
/* Read IFY msg to avoid lockup */
GET_SBIC_data(regs, newlun);
WAIT_CIP(regs);
newlun &= SBIC_TLUN_MASK;
CSR_TRACE('r',csr,asr,newtarget);
} else {
/* Need to get IFY message */
for (newlun = 256; newlun; --newlun) {
GET_SBIC_asr(regs, asr);
if (asr & SBIC_ASR_INT)
break;
delay(1);
}
newlun = 0; /* XXXX */
if ((asr & SBIC_ASR_INT) == 0) {
DBGPRINTF(("RSLT_NI - no IFFY message? asr %x\n",
asr), reselect_debug);
} else {
GET_SBIC_csr(regs,csr);
CSR_TRACE('n',csr,asr,newtarget);
if ((csr == (SBIC_CSR_MIS | MESG_IN_PHASE)) ||
(csr == (SBIC_CSR_MIS_1 | MESG_IN_PHASE)) ||
(csr == (SBIC_CSR_MIS_2 | MESG_IN_PHASE))) {
sbicmsgin(dev);
newlun = dev->sc_msg[0] & 7;
} else {
printf("RSLT_NI - not MESG_IN_PHASE %x\n",
csr);
}
}
}
DBGPRINTF(("sbicnext: reselect %s from targ %d lun %d\n",
csr == SBIC_CSR_RSLT_NI ? "NI" : "IFY",
newtarget, newlun),
reselect_debug > 1 ||
(reselect_debug && csr == SBIC_CSR_RSLT_NI));
if (dev->sc_nexus) {
DBGPRINTF(("%s: reselect %s with active command\n",
device_xname(dev->sc_dev),
csr == SBIC_CSR_RSLT_NI ? "NI" : "IFY"),
reselect_debug > 1);
#if defined(DDB) && defined (DEBUG)
/* Debugger();*/
#endif
TAILQ_INSERT_HEAD(&dev->ready_list, dev->sc_nexus,
chain);
dev->sc_tinfo[dev->target].lubusy &= ~(1 << dev->lun);
dev->sc_nexus = NULL;
}
/* Reload sync values for this target */
if (dev->sc_sync[newtarget].state == SYNC_DONE)
SET_SBIC_syn(regs,
SBIC_SYN(dev->sc_sync[newtarget].offset,
dev->sc_sync[newtarget].period));
else
SET_SBIC_syn(regs, SBIC_SYN (0, sbic_min_period));
for (acb = dev->nexus_list.tqh_first; acb;
acb = acb->chain.tqe_next) {
if (acb->xs->xs_periph->periph_target != newtarget ||
acb->xs->xs_periph->periph_lun != newlun)
continue;
TAILQ_REMOVE(&dev->nexus_list, acb, chain);
dev->sc_nexus = acb;
dev->sc_flags |= SBICF_SELECTED;
dev->target = newtarget;
dev->lun = newlun;
break;
}
if (acb == NULL) {
printf("%s: reselect %s targ %d not in nexus_list %p\n",
device_xname(dev->sc_dev),
csr == SBIC_CSR_RSLT_NI ? "NI" : "IFY", newtarget,
&dev->nexus_list.tqh_first);
panic("bad reselect in sbic");
}
if (csr == SBIC_CSR_RSLT_IFY)
SET_SBIC_cmd(regs, SBIC_CMD_CLR_ACK);
break;
default:
abort:
/*
* Something unexpected happened -- deal with it.
*/
printf("sbicnextstate: aborting csr %02x asr %02x\n", csr,
asr);
#ifdef DDB
Debugger();
#endif
DBG(dev->sc_dmatimo = 0);
if (dev->sc_flags & SBICF_INDMA) {
dev->sc_dmafinish(dev->sc_dmah, dev->sc_dmat, acb);
dev->sc_flags &= ~SBICF_INDMA;
DBG(dev->sc_dmatimo = 0);
}
SET_SBIC_control(regs, SBIC_CTL_EDI | SBIC_CTL_IDI);
sbicerror(dev, regs, csr);
sbicabort(dev, regs, "next");
sbic_scsidone(acb, -1);
SBIC_TRACE(dev);
return SBIC_STATE_ERROR;
}
SBIC_TRACE(dev);
return SBIC_STATE_RUNNING;
}
static int
sbictoscsiperiod(struct sbic_softc *dev, sbic_regmap_p regs, int a)
{
unsigned int fs;
/*
* cycle = DIV / (2*CLK)
* DIV = FS+2
* best we can do is 200ns at 20 MHz, 2 cycles
*/
GET_SBIC_myid(regs,fs);
fs = (fs >> 6) + 2; /* DIV */
fs = (fs * 10000) / (dev->sc_clkfreq << 1); /* Cycle, in ns */
if (a < 2)
a = 8; /* map to Cycles */
return (fs * a) >> 2; /* in 4 ns units */
}
static int
sbicfromscsiperiod(struct sbic_softc *dev, sbic_regmap_p regs, int p)
{
register unsigned int fs, ret;
/* Just the inverse of the above */
GET_SBIC_myid(regs, fs);
fs = (fs >> 6) + 2; /* DIV */
fs = (fs * 10000) / (dev->sc_clkfreq << 1); /* Cycle, in ns */
ret = p << 2; /* in ns units */
ret = ret / fs; /* in Cycles */
if (ret < sbic_min_period)
return sbic_min_period;
/* verify rounding */
if (sbictoscsiperiod(dev, regs, ret) < p)
ret++;
return (ret >= 8) ? 0 : ret;
}
#ifdef DEBUG
void
sbicdumpstate(void)
{
u_char csr, asr;
GET_SBIC_asr(debug_sbic_regs,asr);
GET_SBIC_csr(debug_sbic_regs,csr);
printf("%s: asr:csr(%02x:%02x)->(%02x:%02x)\n",
(routine == 1) ? "sbicgo" :
(routine == 2) ? "sbicintr" :
(routine == 3) ? "sbicicmd" :
(routine == 4) ? "sbicnext" : "unknown",
debug_asr, debug_csr, asr, csr);
}
void
sbictimeout(struct sbic_softc *dev)
{
int s, asr;
s = splbio();
if (dev->sc_dmatimo) {
if (dev->sc_dmatimo > 1) {
printf("%s: DMA timeout #%d\n",
device_xname(dev->sc_dev), dev->sc_dmatimo - 1);
GET_SBIC_asr(&dev->sc_sbicp, asr);
if (asr & SBIC_ASR_INT) {
/* We need to service a missed IRQ */
printf("Servicing a missed int:(%02x,%02x)->(%02x,?)\n",
debug_asr, debug_csr, asr);
sbicintr(dev);
}
sbicdumpstate();
}
dev->sc_dmatimo++;
}
splx(s);
callout_reset(&dev->sc_timo_ch, 30 * hz,
(void *)sbictimeout, dev);
}
void
sbic_dump_acb(struct sbic_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->xs_periph->periph_target,
acb->xs->xs_periph->periph_lun, acb->flags, acb->clen);
for (i = acb->clen; i; --i)
printf(" %02x", *b++);
printf("\n");
printf(" xs: %8p data %8p:%04x ", acb->xs, acb->xs->data,
acb->xs->datalen);
printf("tcnt %lx\n", acb->sc_tcnt);
}
void
sbic_dump(struct sbic_softc *dev)
{
sbic_regmap_p regs;
u_char csr, asr;
struct sbic_acb *acb;
int s;
int i;
s = splbio();
regs = &dev->sc_sbicp;
#if CSR_TRACE_SIZE
printf("csr trace: ");
i = csr_traceptr;
do {
printf("%c%02x%02x%02x ", csr_trace[i].whr,
csr_trace[i].csr, csr_trace[i].asr, csr_trace[i].xtn);
switch(csr_trace[i].whr) {
case 'g':
printf("go "); break;
case 's':
printf("select "); break;
case 'y':
printf("select+ "); break;
case 'i':
printf("intr "); break;
case 'f':
printf("finish "); break;
case '>':
printf("out "); break;
case '<':
printf("in "); break;
case 'm':
printf("msgin "); break;
case 'x':
printf("msginx "); break;
case 'X':
printf("msginX "); break;
case 'r':
printf("reselect "); break;
case 'I':
printf("icmd "); break;
case 'a':
printf("abort "); break;
default:
printf("? ");
}
switch(csr_trace[i].csr) {
case 0x11:
printf("INITIATOR"); break;
case 0x16:
printf("S_XFERRED"); break;
case 0x20:
printf("MSGIN_ACK"); break;
case 0x41:
printf("DISC"); break;
case 0x42:
printf("SEL_TIMEO"); break;
case 0x80:
printf("RSLT_NI"); break;
case 0x81:
printf("RSLT_IFY"); break;
case 0x85:
printf("DISC_1"); break;
case 0x18: case 0x19: case 0x1a:
case 0x1b: case 0x1e: case 0x1f:
case 0x28: case 0x29: case 0x2a:
case 0x2b: case 0x2e: case 0x2f:
case 0x48: case 0x49: case 0x4a:
case 0x4b: case 0x4e: case 0x4f:
case 0x88: case 0x89: case 0x8a:
case 0x8b: case 0x8e: case 0x8f:
switch(csr_trace[i].csr & 0xf0) {
case 0x10:
printf("DONE_"); break;
case 0x20:
printf("STOP_"); break;
case 0x40:
printf("ERR_"); break;
case 0x80:
printf("REQ_"); break;
}
switch(csr_trace[i].csr & 7) {
case 0:
printf("DATA_OUT"); break;
case 1:
printf("DATA_IN"); break;
case 2:
printf("CMD"); break;
case 3:
printf("STATUS"); break;
case 6:
printf("MSG_OUT"); break;
case 7:
printf("MSG_IN"); break;
default:
printf("invld phs");
}
break;
default: printf("****"); break;
}
if (csr_trace[i].asr & SBIC_ASR_INT)
printf(" ASR_INT");
if (csr_trace[i].asr & SBIC_ASR_LCI)
printf(" ASR_LCI");
if (csr_trace[i].asr & SBIC_ASR_BSY)
printf(" ASR_BSY");
if (csr_trace[i].asr & SBIC_ASR_CIP)
printf(" ASR_CIP");
printf("\n");
i = (i + 1) & (CSR_TRACE_SIZE - 1);
} while (i != csr_traceptr);
#endif
GET_SBIC_asr(regs, asr);
if ((asr & SBIC_ASR_INT) == 0)
GET_SBIC_csr(regs, csr);
else
csr = 0;
printf("%s@%p regs %p asr %x csr %x\n", device_xname(dev->sc_dev),
dev, regs, asr, csr);
if ((acb = dev->free_list.tqh_first)) {
printf("Free list:\n");
while (acb) {
sbic_dump_acb(acb);
acb = acb->chain.tqe_next;
}
}
if ((acb = dev->ready_list.tqh_first)) {
printf("Ready list:\n");
while (acb) {
sbic_dump_acb(acb);
acb = acb->chain.tqe_next;
}
}
if ((acb = dev->nexus_list.tqh_first)) {
printf("Nexus list:\n");
while (acb) {
sbic_dump_acb(acb);
acb = acb->chain.tqe_next;
}
}
if (dev->sc_nexus) {
printf("nexus:\n");
sbic_dump_acb(dev->sc_nexus);
}
printf("targ %d lun %d flags %x\n",
dev->target, dev->lun, dev->sc_flags);
for (i = 0; i < 8; ++i) {
if (dev->sc_tinfo[i].cmds > 2) {
printf("tgt %d: cmds %d disc %d lubusy %x\n",
i, dev->sc_tinfo[i].cmds,
dev->sc_tinfo[i].dconns,
dev->sc_tinfo[i].lubusy);
}
}
splx(s);
}
#endif