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NetBSD/sys/arch/hp300/dev/ct.c
thorpej 071aed40ac A foolish consistency; most parts of the kernel use bp->b_data, so 
change these from bp->b_un.b_addr to bp->b_data, as well.  This also
allows us more flexibility to experiment with other data buffer types
hung off of struct buf.
2000-05-19 18:54:22 +00:00

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/* $NetBSD: ct.c,v 1.25 2000/05/19 18:54:31 thorpej Exp $ */
/*-
* Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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 NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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) 1982, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* 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.
*
* @(#)ct.c 8.2 (Berkeley) 1/12/94
*/
/*
* CS80 cartridge tape driver (9144, 88140, 9145)
*
* Reminder:
* C_CC bit (character count option) when used in the CS/80 command
* 'set options' will cause the tape not to stream.
*
* TODO:
* make filesystem compatible
* make block mode work according to mtio(4) spec. (if possible)
* merge with cs80 disk driver
* finish support of 9145
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/mtio.h>
#include <sys/proc.h>
#include <sys/tprintf.h>
#include <hp300/dev/hpibvar.h>
#include <hp300/dev/ctreg.h>
/* number of eof marks to remember */
#define EOFS 128
struct ct_softc {
struct device sc_dev;
int sc_slave; /* HP-IB slave ID */
int sc_punit; /* physical unit */
struct ct_iocmd sc_ioc;
struct ct_rscmd sc_rsc;
struct ct_stat sc_stat;
struct ct_ssmcmd sc_ssmc;
struct ct_srcmd sc_src;
struct ct_soptcmd sc_soptc;
struct ct_ulcmd sc_ul;
struct ct_wfmcmd sc_wfm;
struct ct_clearcmd sc_clear;
struct buf_queue sc_tab;
int sc_active;
struct buf *sc_bp;
struct buf sc_bufstore; /* XXX */
int sc_blkno;
int sc_cmd;
int sc_resid;
char *sc_addr;
int sc_flags;
short sc_type;
tpr_t sc_tpr;
struct hpibqueue sc_hq; /* entry on hpib job queue */
int sc_eofp;
int sc_eofs[EOFS];
};
/* flags */
#define CTF_OPEN 0x01
#define CTF_ALIVE 0x02
#define CTF_WRT 0x04
#define CTF_CMD 0x08
#define CTF_IO 0x10
#define CTF_BEOF 0x20
#define CTF_AEOF 0x40
#define CTF_EOT 0x80
#define CTF_STATWAIT 0x100
#define CTF_CANSTREAM 0x200
#define CTF_WRTTN 0x400
int ctmatch __P((struct device *, struct cfdata *, void *));
void ctattach __P((struct device *, struct device *, void *));
struct cfattach ct_ca = {
sizeof(struct ct_softc), ctmatch, ctattach
};
extern struct cfdriver ct_cd;
int ctident __P((struct device *, struct ct_softc *,
struct hpibbus_attach_args *));
void ctreset __P((struct ct_softc *));
void ctaddeof __P((struct ct_softc *));
void ctustart __P((struct ct_softc *));
void cteof __P((struct ct_softc *, struct buf *));
void ctdone __P((struct ct_softc *, struct buf *));
void ctstart __P((void *));
void ctgo __P((void *));
void ctintr __P((void *));
void ctcommand __P((dev_t, int, int));
cdev_decl(ct);
bdev_decl(ct);
struct ctinfo {
short hwid;
short punit;
char *desc;
} ctinfo[] = {
{ CT7946ID, 1, "7946A" },
{ CT7912PID, 1, "7912P" },
{ CT7914PID, 1, "7914P" },
{ CT9144ID, 0, "9144" },
{ CT9145ID, 0, "9145" },
};
int nctinfo = sizeof(ctinfo) / sizeof(ctinfo[0]);
#define CT_NOREW 4
#define CT_STREAM 8
#define UNIT(x) (minor(x) & 3)
#define ctpunit(x) ((x) & 7)
#ifdef DEBUG
int ctdebug = 0;
#define CDB_FILES 0x01
#define CT_BSF 0x02
#endif
int
ctmatch(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct hpibbus_attach_args *ha = aux;
return (ctident(parent, NULL, ha));
}
void
ctattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct ct_softc *sc = (struct ct_softc *)self;
struct hpibbus_attach_args *ha = aux;
if (ctident(parent, sc, ha) == 0) {
printf("\n%s: didn't respond to describe command!\n",
sc->sc_dev.dv_xname);
return;
}
sc->sc_slave = ha->ha_slave;
sc->sc_punit = ha->ha_punit;
BUFQ_INIT(&sc->sc_tab);
/* Initialize hpib job queue entry. */
sc->sc_hq.hq_softc = sc;
sc->sc_hq.hq_slave = sc->sc_slave;
sc->sc_hq.hq_start = ctstart;
sc->sc_hq.hq_go = ctgo;
sc->sc_hq.hq_intr = ctintr;
ctreset(sc);
sc->sc_flags |= CTF_ALIVE;
}
int
ctident(parent, sc, ha)
struct device *parent;
struct ct_softc *sc;
struct hpibbus_attach_args *ha;
{
struct ct_describe desc;
u_char stat, cmd[3];
char name[7];
int i, id, n, type, canstream;
type = canstream = 0;
/* Verify that we have a CS80 device. */
if ((ha->ha_id & 0x200) == 0)
return (0);
/* Is it one of the tapes we support? */
for (id = 0; id < nctinfo; id++)
if (ha->ha_id == ctinfo[id].hwid)
break;
if (id == nctinfo)
return (0);
ha->ha_punit = ctinfo[id].punit;
/*
* So far, so good. Get drive parameters. Note command
* is always issued to unit 0.
*/
cmd[0] = C_SUNIT(0);
cmd[1] = C_SVOL(0);
cmd[2] = C_DESC;
hpibsend(parent->dv_unit, ha->ha_slave, C_CMD, cmd, sizeof(cmd));
hpibrecv(parent->dv_unit, ha->ha_slave, C_EXEC, &desc, 37);
hpibrecv(parent->dv_unit, ha->ha_slave, C_QSTAT, &stat, sizeof(stat));
bzero(name, sizeof(name));
if (stat == 0) {
n = desc.d_name;
for (i = 5; i >= 0; i--) {
name[i] = (n & 0xf) + '0';
n >>= 4;
}
}
switch (ha->ha_id) {
case CT7946ID:
if (bcmp(name, "079450", 6) == 0)
return (0); /* not really a 7946 */
/* fall into... */
case CT9144ID:
case CT9145ID:
type = CT9144;
canstream = 1;
break;
case CT7912PID:
case CT7914PID:
type = CT88140;
break;
}
if (sc != NULL) {
sc->sc_type = type;
sc->sc_flags = canstream ? CTF_CANSTREAM : 0;
printf(": %s %stape\n", ctinfo[id].desc,
canstream ? "streaming " : "");
}
return (1);
}
void
ctreset(sc)
struct ct_softc *sc;
{
int ctlr, slave;
u_char stat;
ctlr = sc->sc_dev.dv_parent->dv_unit;
slave = sc->sc_slave;
sc->sc_clear.unit = C_SUNIT(sc->sc_punit);
sc->sc_clear.cmd = C_CLEAR;
hpibsend(ctlr, slave, C_TCMD, &sc->sc_clear, sizeof(sc->sc_clear));
hpibswait(ctlr, slave);
hpibrecv(ctlr, slave, C_QSTAT, &stat, sizeof(stat));
sc->sc_src.unit = C_SUNIT(CTCTLR);
sc->sc_src.nop = C_NOP;
sc->sc_src.cmd = C_SREL;
sc->sc_src.param = C_REL;
hpibsend(ctlr, slave, C_CMD, &sc->sc_src, sizeof(sc->sc_src));
hpibswait(ctlr, slave);
hpibrecv(ctlr, slave, C_QSTAT, &stat, sizeof(stat));
sc->sc_ssmc.unit = C_SUNIT(sc->sc_punit);
sc->sc_ssmc.cmd = C_SSM;
sc->sc_ssmc.refm = REF_MASK;
sc->sc_ssmc.fefm = FEF_MASK;
sc->sc_ssmc.aefm = AEF_MASK;
sc->sc_ssmc.iefm = IEF_MASK;
hpibsend(ctlr, slave, C_CMD, &sc->sc_ssmc, sizeof(sc->sc_ssmc));
hpibswait(ctlr, slave);
hpibrecv(ctlr, slave, C_QSTAT, &stat, sizeof(stat));
sc->sc_soptc.unit = C_SUNIT(sc->sc_punit);
sc->sc_soptc.nop = C_NOP;
sc->sc_soptc.cmd = C_SOPT;
sc->sc_soptc.opt = C_SPAR;
hpibsend(ctlr, slave, C_CMD, &sc->sc_soptc, sizeof(sc->sc_soptc));
hpibswait(ctlr, slave);
hpibrecv(ctlr, slave, C_QSTAT, &stat, sizeof(stat));
}
/*ARGSUSED*/
int
ctopen(dev, flag, type, p)
dev_t dev;
int flag, type;
struct proc *p;
{
struct ct_softc *sc;
u_char stat;
int cc, ctlr, slave;
if (UNIT(dev) >= ct_cd.cd_ndevs ||
(sc = ct_cd.cd_devs[UNIT(dev)]) == NULL ||
(sc->sc_flags & CTF_ALIVE) == 0)
return (ENXIO);
if (sc->sc_flags & CTF_OPEN)
return (EBUSY);
ctlr = sc->sc_dev.dv_parent->dv_unit;
slave = sc->sc_slave;
sc->sc_soptc.unit = C_SUNIT(sc->sc_punit);
sc->sc_soptc.nop = C_NOP;
sc->sc_soptc.cmd = C_SOPT;
if ((dev & CT_STREAM) && (sc->sc_flags & CTF_CANSTREAM))
sc->sc_soptc.opt = C_SPAR | C_IMRPT;
else
sc->sc_soptc.opt = C_SPAR;
/*
* Check the return of hpibsend() and hpibswait().
* Drive could be loading/unloading a tape. If not checked,
* driver hangs.
*/
cc = hpibsend(ctlr, slave, C_CMD, &sc->sc_soptc, sizeof(sc->sc_soptc));
if (cc != sizeof(sc->sc_soptc))
return (EBUSY);
hpibswait(ctlr, slave);
cc = hpibrecv(ctlr, slave, C_QSTAT, &stat, sizeof(stat));
if (cc != sizeof(stat))
return(EBUSY);
sc->sc_tpr = tprintf_open(p);
sc->sc_flags |= CTF_OPEN;
return(0);
}
/*ARGSUSED*/
int
ctclose(dev, flag, fmt, p)
dev_t dev;
int flag, fmt;
struct proc *p;
{
struct ct_softc *sc = ct_cd.cd_devs[UNIT(dev)];
if ((sc->sc_flags & (CTF_WRT|CTF_WRTTN)) == (CTF_WRT|CTF_WRTTN) &&
(sc->sc_flags & CTF_EOT) == 0 ) { /* XXX return error if EOT ?? */
ctcommand(dev, MTWEOF, 2);
ctcommand(dev, MTBSR, 1);
if (sc->sc_eofp == EOFS - 1)
sc->sc_eofs[EOFS - 1]--;
else
sc->sc_eofp--;
#ifdef DEBUG
if(ctdebug & CT_BSF)
printf("%s: ctclose backup eofs prt %d blk %d\n",
sc->sc_dev.dv_xname, sc->sc_eofp,
sc->sc_eofs[sc->sc_eofp]);
#endif
}
if ((minor(dev) & CT_NOREW) == 0)
ctcommand(dev, MTREW, 1);
sc->sc_flags &= ~(CTF_OPEN | CTF_WRT | CTF_WRTTN);
tprintf_close(sc->sc_tpr);
#ifdef DEBUG
if (ctdebug & CDB_FILES)
printf("ctclose: flags %x\n", sc->sc_flags);
#endif
return(0); /* XXX */
}
void
ctcommand(dev, cmd, cnt)
dev_t dev;
int cmd;
int cnt;
{
struct ct_softc *sc = ct_cd.cd_devs[UNIT(dev)];
struct buf *bp = &sc->sc_bufstore;
struct buf *nbp = 0;
if (cmd == MTBSF && sc->sc_eofp == EOFS - 1) {
cnt = sc->sc_eofs[EOFS - 1] - cnt;
ctcommand(dev, MTREW, 1);
ctcommand(dev, MTFSF, cnt);
cnt = 2;
cmd = MTBSR;
}
if (cmd == MTBSF && sc->sc_eofp - cnt < 0) {
cnt = 1;
cmd = MTREW;
}
sc->sc_flags |= CTF_CMD;
sc->sc_bp = bp;
sc->sc_cmd = cmd;
bp->b_dev = dev;
if (cmd == MTFSF) {
nbp = (struct buf *)geteblk(MAXBSIZE);
bp->b_data = nbp->b_data;
bp->b_bcount = MAXBSIZE;
}
while (cnt-- > 0) {
bp->b_flags = B_BUSY;
if (cmd == MTBSF) {
sc->sc_blkno = sc->sc_eofs[sc->sc_eofp];
sc->sc_eofp--;
#ifdef DEBUG
if (ctdebug & CT_BSF)
printf("%s: backup eof pos %d blk %d\n",
sc->sc_dev.dv_xname, sc->sc_eofp,
sc->sc_eofs[sc->sc_eofp]);
#endif
}
ctstrategy(bp);
biowait(bp);
}
bp->b_flags = 0;
sc->sc_flags &= ~CTF_CMD;
if (nbp)
brelse(nbp);
}
void
ctstrategy(bp)
struct buf *bp;
{
int s, unit;
struct ct_softc *sc;
unit = UNIT(bp->b_dev);
sc = ct_cd.cd_devs[unit];
s = splbio();
BUFQ_INSERT_TAIL(&sc->sc_tab, bp);
if (sc->sc_active == 0) {
sc->sc_active = 1;
ctustart(sc);
}
splx(s);
}
void
ctustart(sc)
struct ct_softc *sc;
{
struct buf *bp;
bp = BUFQ_FIRST(&sc->sc_tab);
sc->sc_addr = bp->b_data;
sc->sc_resid = bp->b_bcount;
if (hpibreq(sc->sc_dev.dv_parent, &sc->sc_hq))
ctstart(sc);
}
void
ctstart(arg)
void *arg;
{
struct ct_softc *sc = arg;
struct buf *bp;
int i, ctlr, slave;
ctlr = sc->sc_dev.dv_parent->dv_unit;
slave = sc->sc_slave;
bp = BUFQ_FIRST(&sc->sc_tab);
if ((sc->sc_flags & CTF_CMD) && sc->sc_bp == bp) {
switch(sc->sc_cmd) {
case MTFSF:
bp->b_flags |= B_READ;
goto mustio;
case MTBSF:
goto gotaddr;
case MTOFFL:
sc->sc_blkno = 0;
sc->sc_ul.unit = C_SUNIT(sc->sc_punit);
sc->sc_ul.cmd = C_UNLOAD;
hpibsend(ctlr, slave, C_CMD, &sc->sc_ul,
sizeof(sc->sc_ul));
break;
case MTWEOF:
sc->sc_blkno++;
sc->sc_flags |= CTF_WRT;
sc->sc_wfm.unit = C_SUNIT(sc->sc_punit);
sc->sc_wfm.cmd = C_WFM;
hpibsend(ctlr, slave, C_CMD, &sc->sc_wfm,
sizeof(sc->sc_wfm));
ctaddeof(sc);
break;
case MTBSR:
sc->sc_blkno--;
goto gotaddr;
case MTFSR:
sc->sc_blkno++;
goto gotaddr;
case MTREW:
sc->sc_blkno = 0;
#ifdef DEBUG
if(ctdebug & CT_BSF)
printf("%s: clearing eofs\n",
sc->sc_dev.dv_xname);
#endif
for (i=0; i<EOFS; i++)
sc->sc_eofs[i] = 0;
sc->sc_eofp = 0;
gotaddr:
sc->sc_ioc.saddr = C_SADDR;
sc->sc_ioc.addr0 = 0;
sc->sc_ioc.addr = sc->sc_blkno;
sc->sc_ioc.unit = C_SUNIT(sc->sc_punit);
sc->sc_ioc.nop2 = C_NOP;
sc->sc_ioc.slen = C_SLEN;
sc->sc_ioc.len = 0;
sc->sc_ioc.nop3 = C_NOP;
sc->sc_ioc.cmd = C_READ;
hpibsend(ctlr, slave, C_CMD, &sc->sc_ioc,
sizeof(sc->sc_ioc));
break;
}
} else {
mustio:
if ((bp->b_flags & B_READ) &&
sc->sc_flags & (CTF_BEOF|CTF_EOT)) {
#ifdef DEBUG
if (ctdebug & CDB_FILES)
printf("ctstart: before flags %x\n",
sc->sc_flags);
#endif
if (sc->sc_flags & CTF_BEOF) {
sc->sc_flags &= ~CTF_BEOF;
sc->sc_flags |= CTF_AEOF;
#ifdef DEBUG
if (ctdebug & CDB_FILES)
printf("ctstart: after flags %x\n",
sc->sc_flags);
#endif
}
bp->b_resid = bp->b_bcount;
ctdone(sc, bp);
return;
}
sc->sc_flags |= CTF_IO;
sc->sc_ioc.unit = C_SUNIT(sc->sc_punit);
sc->sc_ioc.saddr = C_SADDR;
sc->sc_ioc.addr0 = 0;
sc->sc_ioc.addr = sc->sc_blkno;
sc->sc_ioc.nop2 = C_NOP;
sc->sc_ioc.slen = C_SLEN;
sc->sc_ioc.len = sc->sc_resid;
sc->sc_ioc.nop3 = C_NOP;
if (bp->b_flags & B_READ)
sc->sc_ioc.cmd = C_READ;
else {
sc->sc_ioc.cmd = C_WRITE;
sc->sc_flags |= (CTF_WRT | CTF_WRTTN);
}
hpibsend(ctlr, slave, C_CMD, &sc->sc_ioc, sizeof(sc->sc_ioc));
}
hpibawait(ctlr);
}
void
ctgo(arg)
void *arg;
{
struct ct_softc *sc = arg;
struct buf *bp;
int rw;
bp = BUFQ_FIRST(&sc->sc_tab);
rw = bp->b_flags & B_READ;
hpibgo(sc->sc_dev.dv_parent->dv_unit, sc->sc_slave, C_EXEC,
sc->sc_addr, sc->sc_resid, rw, rw != 0);
}
/*
* Hideous grue to handle EOF/EOT (mostly for reads)
*/
void
cteof(sc, bp)
struct ct_softc *sc;
struct buf *bp;
{
long blks;
/*
* EOT on a write is an error.
*/
if ((bp->b_flags & B_READ) == 0) {
bp->b_resid = bp->b_bcount;
bp->b_flags |= B_ERROR;
bp->b_error = ENOSPC;
sc->sc_flags |= CTF_EOT;
return;
}
/*
* Use returned block position to determine how many blocks
* we really read and update b_resid.
*/
blks = sc->sc_stat.c_blk - sc->sc_blkno - 1;
#ifdef DEBUG
if (ctdebug & CDB_FILES)
printf("cteof: bc %ld oblk %d nblk %ld read %ld, resid %ld\n",
bp->b_bcount, sc->sc_blkno, sc->sc_stat.c_blk,
blks, bp->b_bcount - CTKTOB(blks));
#endif
if (blks == -1) { /* 9145 on EOF does not change sc_stat.c_blk */
blks = 0;
sc->sc_blkno++;
}
else {
sc->sc_blkno = sc->sc_stat.c_blk;
}
bp->b_resid = bp->b_bcount - CTKTOB(blks);
/*
* If we are at physical EOV or were after an EOF,
* we are now at logical EOT.
*/
if ((sc->sc_stat.c_aef & AEF_EOV) ||
(sc->sc_flags & CTF_AEOF)) {
sc->sc_flags |= CTF_EOT;
sc->sc_flags &= ~(CTF_AEOF|CTF_BEOF);
}
/*
* If we were before an EOF or we have just completed a FSF,
* we are now after EOF.
*/
else if ((sc->sc_flags & CTF_BEOF) ||
((sc->sc_flags & CTF_CMD) && sc->sc_cmd == MTFSF)) {
sc->sc_flags |= CTF_AEOF;
sc->sc_flags &= ~CTF_BEOF;
}
/*
* Otherwise if we read something we are now before EOF
* (and no longer after EOF).
*/
else if (blks) {
sc->sc_flags |= CTF_BEOF;
sc->sc_flags &= ~CTF_AEOF;
}
/*
* Finally, if we didn't read anything we just passed an EOF
*/
else
sc->sc_flags |= CTF_AEOF;
#ifdef DEBUG
if (ctdebug & CDB_FILES)
printf("cteof: leaving flags %x\n", sc->sc_flags);
#endif
}
/* ARGSUSED */
void
ctintr(arg)
void *arg;
{
struct ct_softc *sc = arg;
struct buf *bp;
u_char stat;
int ctlr, slave, unit;
ctlr = sc->sc_dev.dv_parent->dv_unit;
slave = sc->sc_slave;
unit = sc->sc_dev.dv_unit;
bp = BUFQ_FIRST(&sc->sc_tab);
if (bp == NULL) {
printf("%s: bp == NULL\n", sc->sc_dev.dv_xname);
return;
}
if (sc->sc_flags & CTF_IO) {
sc->sc_flags &= ~CTF_IO;
if (hpibustart(ctlr))
ctgo(sc);
return;
}
if ((sc->sc_flags & CTF_STATWAIT) == 0) {
if (hpibpptest(ctlr, slave) == 0) {
sc->sc_flags |= CTF_STATWAIT;
hpibawait(ctlr);
return;
}
} else
sc->sc_flags &= ~CTF_STATWAIT;
hpibrecv(ctlr, slave, C_QSTAT, &stat, 1);
#ifdef DEBUG
if (ctdebug & CDB_FILES)
printf("ctintr: before flags %x\n", sc->sc_flags);
#endif
if (stat) {
sc->sc_rsc.unit = C_SUNIT(sc->sc_punit);
sc->sc_rsc.cmd = C_STATUS;
hpibsend(ctlr, slave, C_CMD, &sc->sc_rsc, sizeof(sc->sc_rsc));
hpibrecv(ctlr, slave, C_EXEC, &sc->sc_stat,
sizeof(sc->sc_stat));
hpibrecv(ctlr, slave, C_QSTAT, &stat, 1);
#ifdef DEBUG
if (ctdebug & CDB_FILES)
printf("ctintr: return stat 0x%x, A%x F%x blk %ld\n",
stat, sc->sc_stat.c_aef,
sc->sc_stat.c_fef, sc->sc_stat.c_blk);
#endif
if (stat == 0) {
if (sc->sc_stat.c_aef & (AEF_EOF | AEF_EOV)) {
cteof(sc, bp);
ctaddeof(sc);
goto done;
}
if (sc->sc_stat.c_fef & FEF_PF) {
ctreset(sc);
ctstart(sc);
return;
}
if (sc->sc_stat.c_fef & FEF_REXMT) {
ctstart(sc);
return;
}
if (sc->sc_stat.c_aef & 0x5800) {
if (sc->sc_stat.c_aef & 0x4000)
tprintf(sc->sc_tpr,
"%s: uninitialized media\n",
sc->sc_dev.dv_xname);
if (sc->sc_stat.c_aef & 0x1000)
tprintf(sc->sc_tpr,
"%s: not ready\n",
sc->sc_dev.dv_xname);
if (sc->sc_stat.c_aef & 0x0800)
tprintf(sc->sc_tpr,
"%s: write protect\n",
sc->sc_dev.dv_xname);
} else {
printf("%s err: v%d u%d ru%d bn%ld, ",
sc->sc_dev.dv_xname,
(sc->sc_stat.c_vu>>4)&0xF,
sc->sc_stat.c_vu&0xF,
sc->sc_stat.c_pend,
sc->sc_stat.c_blk);
printf("R0x%x F0x%x A0x%x I0x%x\n",
sc->sc_stat.c_ref,
sc->sc_stat.c_fef,
sc->sc_stat.c_aef,
sc->sc_stat.c_ief);
}
} else
printf("%s: request status failed\n",
sc->sc_dev.dv_xname);
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
goto done;
} else
bp->b_resid = 0;
if (sc->sc_flags & CTF_CMD) {
switch (sc->sc_cmd) {
case MTFSF:
sc->sc_flags &= ~(CTF_BEOF|CTF_AEOF);
sc->sc_blkno += CTBTOK(sc->sc_resid);
ctstart(sc);
return;
case MTBSF:
sc->sc_flags &= ~(CTF_AEOF|CTF_BEOF|CTF_EOT);
break;
case MTBSR:
sc->sc_flags &= ~CTF_BEOF;
if (sc->sc_flags & CTF_EOT) {
sc->sc_flags |= CTF_AEOF;
sc->sc_flags &= ~CTF_EOT;
} else if (sc->sc_flags & CTF_AEOF) {
sc->sc_flags |= CTF_BEOF;
sc->sc_flags &= ~CTF_AEOF;
}
break;
case MTWEOF:
sc->sc_flags &= ~CTF_BEOF;
if (sc->sc_flags & (CTF_AEOF|CTF_EOT)) {
sc->sc_flags |= CTF_EOT;
sc->sc_flags &= ~CTF_AEOF;
} else
sc->sc_flags |= CTF_AEOF;
break;
case MTREW:
case MTOFFL:
sc->sc_flags &= ~(CTF_BEOF|CTF_AEOF|CTF_EOT);
break;
}
} else {
sc->sc_flags &= ~CTF_AEOF;
sc->sc_blkno += CTBTOK(sc->sc_resid);
}
done:
#ifdef DEBUG
if (ctdebug & CDB_FILES)
printf("ctintr: after flags %x\n", sc->sc_flags);
#endif
ctdone(sc, bp);
}
void
ctdone(sc, bp)
struct ct_softc *sc;
struct buf *bp;
{
BUFQ_REMOVE(&sc->sc_tab, bp);
biodone(bp);
hpibfree(sc->sc_dev.dv_parent, &sc->sc_hq);
if (BUFQ_FIRST(&sc->sc_tab) == NULL) {
sc->sc_active = 0;
return;
}
ctustart(sc);
}
int
ctread(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
return (physio(ctstrategy, NULL, dev, B_READ, minphys, uio));
}
int
ctwrite(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
/* XXX: check for hardware write-protect? */
return (physio(ctstrategy, NULL, dev, B_WRITE, minphys, uio));
}
/*ARGSUSED*/
int
ctioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
int flag;
caddr_t data;
struct proc *p;
{
struct mtop *op;
int cnt;
switch (cmd) {
case MTIOCTOP:
op = (struct mtop *)data;
switch(op->mt_op) {
case MTWEOF:
case MTFSF:
case MTBSR:
case MTBSF:
case MTFSR:
cnt = op->mt_count;
break;
case MTREW:
case MTOFFL:
cnt = 1;
break;
default:
return(EINVAL);
}
ctcommand(dev, op->mt_op, cnt);
break;
case MTIOCGET:
break;
default:
return(EINVAL);
}
return(0);
}
/* ARGSUSED */
int
ctdump(dev, blkno, va, size)
dev_t dev;
daddr_t blkno;
caddr_t va;
size_t size;
{
return (ENODEV);
}
void
ctaddeof(sc)
struct ct_softc *sc;
{
if (sc->sc_eofp == EOFS - 1)
sc->sc_eofs[EOFS - 1]++;
else {
sc->sc_eofp++;
if (sc->sc_eofp == EOFS - 1)
sc->sc_eofs[EOFS - 1] = EOFS;
else
/* save blkno */
sc->sc_eofs[sc->sc_eofp] = sc->sc_blkno - 1;
}
#ifdef DEBUG
if (ctdebug & CT_BSF)
printf("%s: add eof pos %d blk %d\n",
sc->sc_dev.dv_xname, sc->sc_eofp,
sc->sc_eofs[sc->sc_eofp]);
#endif
}
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