4.4BSD/usr/src/sys/hp300/dev/ac.c
/*
* Copyright (c) 1991 University of Utah.
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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: Utah $Hdr: ac.c 1.5 92/01/21$
*
* @(#)ac.c 8.1 (Berkeley) 6/10/93
*/
/*
* SCSI driver for MO autochanger.
*
* Very crude. Because of the lack of connect/disconnect support in the
* scsi driver, this driver can tie up the SCSI bus for a long time. It
* also grabs a DMA channel and holds it for the duration even though it
* never uses it.
*/
#include "ac.h"
#if NAC > 0
#include <sys/param.h>
#include <sys/buf.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <hp/dev/device.h>
#include <hp300/dev/scsireg.h>
#include <hp300/dev/acioctl.h>
#include <hp300/dev/acvar.h>
extern int scsi_test_unit_rdy();
extern int scsi_request_sense();
extern int scsiustart();
extern int scsigo();
extern void scsifree();
extern void scsireset();
extern void scsi_delay();
extern int scsi_immed_command();
int acinit(), acstart(), acgo(), acintr();
struct driver acdriver = {
acinit, "ac", acstart, acgo, acintr,
};
struct ac_softc ac_softc[NAC];
static struct buf acbuf[NAC];
static struct scsi_fmt_cdb accmd[NAC];
#ifdef DEBUG
int ac_debug = 0x0000;
#define ACD_FOLLOW 0x0001
#define ACD_OPEN 0x0002
#endif
acinit(hd)
register struct hp_device *hd;
{
int unit = hd->hp_unit;
register struct ac_softc *sc = &ac_softc[unit];
sc->sc_hd = hd;
sc->sc_punit = hd->hp_flags & 7;
if (acident(sc, hd) < 0)
return(0);
sc->sc_dq.dq_unit = unit;
sc->sc_dq.dq_ctlr = hd->hp_ctlr;
sc->sc_dq.dq_slave = hd->hp_slave;
sc->sc_dq.dq_driver = &acdriver;
sc->sc_bp = &acbuf[unit];
sc->sc_cmd = &accmd[unit];
sc->sc_flags = ACF_ALIVE;
return(1);
}
acident(sc, hd)
register struct ac_softc *sc;
register struct hp_device *hd;
{
int unit;
register int ctlr, slave;
int i, stat;
int tries = 5;
char idstr[32];
struct scsi_inquiry inqbuf;
static struct scsi_fmt_cdb inq = {
6,
CMD_INQUIRY, 0, 0, 0, sizeof(inqbuf), 0
};
ctlr = hd->hp_ctlr;
slave = hd->hp_slave;
unit = sc->sc_punit;
scsi_delay(-1);
/*
* See if device is ready
*/
while ((i = scsi_test_unit_rdy(ctlr, slave, unit)) != 0) {
if (i == -1 || --tries < 0)
/* doesn't exist or not a CCS device */
goto failed;
if (i == STS_CHECKCOND) {
u_char sensebuf[128];
struct scsi_xsense *sp;
scsi_request_sense(ctlr, slave, unit,
sensebuf, sizeof(sensebuf));
sp = (struct scsi_xsense *) sensebuf;
if (sp->class == 7 && sp->key == 6)
/* drive doing an RTZ -- give it a while */
DELAY(1000000);
}
DELAY(1000);
}
/*
* Find out if it is an autochanger
*/
if (scsi_immed_command(ctlr, slave, unit, &inq,
(u_char *)&inqbuf, sizeof(inqbuf), B_READ))
goto failed;
if (inqbuf.type != 8 || inqbuf.qual != 0x80 || inqbuf.version != 2)
goto failed;
bcopy((caddr_t)&inqbuf.vendor_id, (caddr_t)idstr, 28);
for (i = 27; i > 23; --i)
if (idstr[i] != ' ')
break;
idstr[i+1] = 0;
for (i = 23; i > 7; --i)
if (idstr[i] != ' ')
break;
idstr[i+1] = 0;
for (i = 7; i >= 0; --i)
if (idstr[i] != ' ')
break;
idstr[i+1] = 0;
printf("ac%d: %s %s rev %s\n", hd->hp_unit,
&idstr[0], &idstr[8], &idstr[24]);
scsi_delay(0);
return(inqbuf.type);
failed:
scsi_delay(0);
return(-1);
}
/*ARGSUSED*/
acopen(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
register int unit = minor(dev);
register struct ac_softc *sc = &ac_softc[unit];
int error = 0;
if (unit >= NAC || (sc->sc_flags & ACF_ALIVE) == 0)
return(ENXIO);
if (sc->sc_flags & ACF_OPEN)
return(EBUSY);
/*
* Since acgeteinfo can block we mark the changer open now.
*/
sc->sc_flags |= ACF_OPEN;
if (acgeteinfo(dev)) {
sc->sc_flags &= ~ACF_OPEN;
return(EIO);
return(0);
}
/*ARGSUSED*/
acclose(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
struct ac_softc *sc = &ac_softc[minor(dev)];
sc->sc_flags &= ~ACF_OPEN;
}
#define ACRESLEN(ep) \
(8 + (ep)->nmte*12 + (ep)->nse*12 + (ep)->niee*12 + (ep)->ndte*20)
/*ARGSUSED*/
acioctl(dev, cmd, data, flag, p)
dev_t dev;
int cmd;
caddr_t data;
int flag;
struct proc *p;
{
register struct ac_softc *sc = &ac_softc[minor(dev)];
char *dp;
int dlen, error = 0;
switch (cmd) {
default:
return (EINVAL);
/* perform an init element status and mode sense to reset state */
case ACIOCINIT:
error = accommand(dev, ACCMD_INITES, (caddr_t)0, 0);
if (!error)
error = acgeteinfo(dev);
break;
/* copy internal element information */
case ACIOCGINFO:
*(struct acinfo *)data = sc->sc_einfo;
break;
case ACIOCRAWES:
{
struct acbuffer *acbp = (struct acbuffer *)data;
dlen = ACRESLEN(&sc->sc_einfo);
dp = (char *) malloc(dlen, M_DEVBUF, M_WAITOK);
error = accommand(dev, ACCMD_READES, dp, dlen);
if (!error) {
dlen = *(int *)&dp[4] + 8;
if (dlen > acbp->buflen)
dlen = acbp->buflen;
error = copyout(dp, acbp->bufptr, dlen);
}
break;
}
case ACIOCGSTAT:
{
struct acbuffer *acbp = (struct acbuffer *)data;
dlen = ACRESLEN(&sc->sc_einfo);
dp = (char *) malloc(dlen, M_DEVBUF, M_WAITOK);
error = accommand(dev, ACCMD_READES, dp, dlen);
if (!error) {
int ne;
char *tbuf;
ne = sc->sc_einfo.nmte + sc->sc_einfo.nse +
sc->sc_einfo.niee + sc->sc_einfo.ndte;
dlen = ne * sizeof(struct aceltstat);
tbuf = (char *) malloc(dlen, M_DEVBUF, M_WAITOK);
acconvert(dp, tbuf, ne);
if (dlen > acbp->buflen)
dlen = acbp->buflen;
error = copyout(tbuf, acbp->bufptr, dlen);
free(tbuf, M_DEVBUF);
}
free(dp, M_DEVBUF);
break;
}
case ACIOCMOVE:
error = accommand(dev, ACCMD_MOVEM, data,
sizeof(struct acmove));
break;
}
return(error);
}
accommand(dev, command, bufp, buflen)
dev_t dev;
int command;
char *bufp;
int buflen;
{
int unit = minor(dev);
register struct ac_softc *sc = &ac_softc[unit];
register struct buf *bp = sc->sc_bp;
register struct scsi_fmt_cdb *cmd = sc->sc_cmd;
int error;
#ifdef DEBUG
if (ac_debug & ACD_FOLLOW)
printf("accommand(dev=%x, cmd=%x, buf=%x, buflen=%x)\n",
dev, command, bufp, buflen);
#endif
if (sc->sc_flags & ACF_ACTIVE)
panic("accommand: active!");
sc->sc_flags |= ACF_ACTIVE;
bzero((caddr_t)cmd->cdb, sizeof(cmd->cdb));
cmd->cdb[0] = command;
switch (command) {
case ACCMD_INITES:
cmd->len = 6;
break;
case ACCMD_READES:
cmd->len = 12;
*(short *)&cmd->cdb[2] = 0;
*(short *)&cmd->cdb[4] =
sc->sc_einfo.nmte + sc->sc_einfo.nse +
sc->sc_einfo.niee + sc->sc_einfo.ndte;
cmd->cdb[7] = buflen >> 16;
cmd->cdb[8] = buflen >> 8;
cmd->cdb[9] = buflen;
break;
case ACCMD_MODESENSE:
cmd->len = 6;
cmd->cdb[2] = 0x3F; /* all pages */
cmd->cdb[4] = buflen;
break;
case ACCMD_MOVEM:
cmd->len = 12;
*(short *)&cmd->cdb[2] = sc->sc_picker;
*(short *)&cmd->cdb[4] = *(short *)&bufp[0];
*(short *)&cmd->cdb[6] = *(short *)&bufp[2];
if (*(short *)&bufp[4] & AC_INVERT)
cmd->cdb[10] = 1;
bufp = 0;
buflen = 0;
break;
default:
panic("accommand: bad command");
}
bp->b_flags = B_BUSY|B_READ;
bp->b_dev = dev;
bp->b_un.b_addr = bufp;
bp->b_bcount = buflen;
bp->b_resid = 0;
bp->b_blkno = 0;
bp->b_error = 0;
if (scsireq(&sc->sc_dq))
acstart(unit);
error = biowait(bp);
sc->sc_flags &= ~ACF_ACTIVE;
return (error);
}
acstart(unit)
int unit;
{
#ifdef DEBUG
if (ac_debug & ACD_FOLLOW)
printf("acstart(unit=%x)\n", unit);
#endif
if (scsiustart(ac_softc[unit].sc_hd->hp_ctlr))
acgo(unit);
}
acgo(unit)
int unit;
{
register struct ac_softc *sc = &ac_softc[unit];
register struct buf *bp = sc->sc_bp;
struct hp_device *hp = sc->sc_hd;
int stat;
#ifdef DEBUG
if (ac_debug & ACD_FOLLOW)
printf("acgo(unit=%x): ", unit);
#endif
stat = scsigo(hp->hp_ctlr, hp->hp_slave, sc->sc_punit,
bp, sc->sc_cmd, 0);
#ifdef DEBUG
if (ac_debug & ACD_FOLLOW)
printf("scsigo returns %x\n", stat);
#endif
if (stat) {
bp->b_error = EIO;
bp->b_flags |= B_ERROR;
(void) biodone(bp);
scsifree(&sc->sc_dq);
}
}
acintr(unit, stat)
int unit, stat;
{
register struct ac_softc *sc = &ac_softc[unit];
register struct buf *bp = sc->sc_bp;
u_char sensebuf[78];
struct scsi_xsense *sp;
#ifdef DEBUG
if (ac_debug & ACD_FOLLOW)
printf("acintr(unit=%x, stat=%x)\n", unit, stat);
#endif
switch (stat) {
case 0:
bp->b_resid = 0;
break;
case STS_CHECKCOND:
scsi_request_sense(sc->sc_hd->hp_ctlr, sc->sc_hd->hp_slave,
sc->sc_punit, sensebuf, sizeof sensebuf);
sp = (struct scsi_xsense *)sensebuf;
printf("ac%d: acintr sense key=%x, ac=%x, acq=%x\n",
unit, sp->key, sp->info4, sp->len);
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
break;
default:
printf("ac%d: acintr unknown status 0x%x\n", unit, stat);
break;
}
(void) biodone(sc->sc_bp);
scsifree(&sc->sc_dq);
}
acgeteinfo(dev)
dev_t dev;
{
register struct ac_softc *sc = &ac_softc[minor(dev)];
register char *bp;
char msbuf[48];
int error;
bzero(msbuf, sizeof msbuf);
error = accommand(dev, ACCMD_MODESENSE, msbuf, sizeof msbuf);
if (error)
return(error);
bp = &msbuf[4];
while (bp < &msbuf[48]) {
switch (bp[0] & 0x3F) {
case 0x1D:
sc->sc_einfo = *(struct acinfo *)&bp[2];
sc->sc_picker = sc->sc_einfo.fmte; /* XXX */
return(0);
case 0x1E:
bp += 4;
break;
case 0x1F:
bp += 20;
break;
default:
printf("acgeteinfo: bad page type %x\n", bp[0]);
return(EIO);
}
}
return(EIO);
}
acconvert(sbuf, dbuf, ne)
char *sbuf, *dbuf;
int ne;
{
register struct aceltstat *ep = (struct aceltstat *)dbuf;
register struct ac_restatphdr *phdr;
register struct ac_restatdb *dbp;
struct ac_restathdr *hdr;
#ifdef DEBUG
register int bcount;
#endif
hdr = (struct ac_restathdr *)&sbuf[0];
sbuf += sizeof *hdr;
#ifdef DEBUG
if (ac_debug & ACD_FOLLOW)
printf("element status: first=%d, num=%d, len=%d\n",
hdr->ac_felt, hdr->ac_nelt, hdr->ac_bcount);
if (hdr->ac_nelt != ne) {
printf("acconvert: # of elements, %d != %d\n",
hdr->ac_nelt, ne);
if (hdr->ac_nelt < ne)
ne = hdr->ac_nelt;
}
bcount = hdr->ac_bcount;
#endif
while (ne) {
phdr = (struct ac_restatphdr *)sbuf;
sbuf += sizeof *phdr;
#ifdef DEBUG
bcount -= sizeof *phdr;
#endif
dbp = (struct ac_restatdb *)sbuf;
sbuf += phdr->ac_bcount;
#ifdef DEBUG
bcount -= phdr->ac_bcount;
#endif
while (dbp < (struct ac_restatdb *)sbuf) {
ep->type = phdr->ac_type;
ep->eaddr = dbp->ac_eaddr;
ep->flags = 0;
if (dbp->ac_full)
ep->flags |= AC_FULL;
if (dbp->ac_exc)
ep->flags |= AC_ERROR;
if (dbp->ac_acc)
ep->flags |= AC_ACCESS;
dbp = (struct ac_restatdb *)
((char *)dbp + phdr->ac_dlen);
ep++;
ne--;
}
#ifdef DEBUG
if (ne < 0 || bcount < 0)
panic("acconvert: inconsistant");
#endif
}
}
#endif