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/* $NetBSD: ts.c,v 1.13 1999/04/12 20:57:52 pk Exp $ */
/*-
* Copyright (c) 1991 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.
*
* @(#)tmscp.c 7.16 (Berkeley) 5/9/91
*/
/*
* sccsid = "@(#)tmscp.c 1.24 (ULTRIX) 1/21/86";
*/
/************************************************************************
* *
* Licensed from Digital Equipment Corporation *
* Copyright (c) *
* Digital Equipment Corporation *
* Maynard, Massachusetts *
* 1985, 1986 *
* All rights reserved. *
* *
* The Information in this software is subject to change *
* without notice and should not be construed as a commitment *
* by Digital Equipment Corporation. Digital makes no *
* representations about the suitability of this software for *
* any purpose. It is supplied "As Is" without expressed or *
* implied warranty. *
* *
* If the Regents of the University of California or its *
* licensees modify the software in a manner creating *
* derivative copyright rights, appropriate copyright *
* legends may be placed on the derivative work in addition *
* to that set forth above. *
* *
************************************************************************/
/*
* TSV05/TS05 device driver, written by Bertram Barth.
*
* should be TS11 compatible (untested)
*/
#define TS11_COMPAT /* don't use extended features provided by TS05 */
#ifdef NEED_18BIT
#define TS_UBAFLAGS UBA_NEED16
#else
#define TS_UBAFLAGS 0
#endif
#define ENABLE_ESS
#define ENABLE_END
#define ENABLE_EAI /* enable Attention-Interrupts */
#undef ENABLE_EAI
#define ENABLE_ERI /* Enable Release Buffer Interrupts */
#undef ENABLE_ERI
#ifdef DEBUG
int tsdebug = 1;
# define debug(x) if (tsdebug > 0) {DELAY(2000); printf x; DELAY(3000);}
# define debug10(x) if (tsdebug > 9) printf x
#else
# define debug(x) /* just ignore it */
# define debug10(x) /* just ignore it */
#endif
#ifdef TRACE
int tstrace = 1;
# define trace(x) if (tstrace > 0) {DELAY(2000); printf x; DELAY(3000);}
#else
# define trace(x) /* just ignore it */
#endif
/*
* TODO: most :-)
*
* include uba-mapping into tsinit();
* merge tsinit(), tsreset() and tsprobe();
* complete tsintr();
* add proper error/status messages
* make messages appear where they are intended to.
* check for termination-classes and appropriate actions.
* check if flags like CVC and ATTN should be used.
* look for correct handling of attentions.
* check for correct usage of retry-commands.
* ...
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/buf.h>
#include <sys/conf.h>
#include <sys/errno.h>
#include <sys/file.h>
#include <sys/map.h>
#include <sys/syslog.h>
#include <sys/ioctl.h>
#include <sys/mtio.h>
#include <sys/uio.h>
#include <sys/proc.h>
#include <machine/pte.h>
#include <machine/sid.h>
#include <machine/cpu.h>
#include <machine/mtpr.h>
#include <vax/uba/ubareg.h>
#include <vax/uba/ubavar.h>
#include <vax/uba/tsreg.h>
#include "ts.h"
/*
* ts command packets and communication area (per controller)
*/
struct ts {
struct tsdevice *reg; /* address of i/o-registers */
struct tscmd cmd; /* command packet(s) */
struct tsmsg msg; /* message packet(s) */
} ts[NTS];
/*
* Software status, per controller.
* also status per tape-unit, since only one unit per controller
* (thus we have no struct ts_info)
*/
struct ts_softc {
struct device sc_dev; /* Autoconf ... */
struct uba_unit sc_unit; /* Struct common for UBA to talk */
struct ts *sc_ts; /* Unibus address of uda struct */
short sc_mapped; /* Unibus map allocated ? */
int sc_ubainfo; /* Unibus mapping info */
short sc_state; /* see below: ST_xxx */
short sc_flags; /* see below: FL_xxx */
short sc_lcmd; /* last command word */
short sc_rtc; /* retry count for lcmd */
short sc_lssr; /* last status register */
short sc_lmsgh; /* last message header */
short sc_lxst0; /* last status word */
short sc_cmdf; /* command flags (ack,cvc,ie) */
short sc_openf; /* lock against multiple opens */
short sc_liowf; /* last operation was write */
int sc_micro; /* microcode revision */
int sc_ivec; /* interrupt vector address */
short sc_ipl; /* interrupt priority, Q-bus */
};
void tsintr __P((int));
int tsinit __P((struct ts_softc *));
void tscommand __P((dev_t, int, int));
int tsstatus __P((int));
int tsexec __P((int, int));
int tsstart __P((struct ts_softc *, struct buf *));
int tswchar __P((int));
void tsreset __P((int));
void tsxstatus __P((struct tsmsg *));
int tsmatch __P((struct device *, void *, void *));
void tsattach __P((struct device *, struct device *, void *));
void tsstrategy __P((struct buf *));
int tsopen __P((dev_t, int, int, struct proc *));
int tsclose __P((dev_t, int, int, struct proc *));
int tsioctl __P((dev_t, u_long, caddr_t, int, struct proc *));
int tsread __P((dev_t, struct uio *));
int tswrite __P((dev_t, struct uio *));
int tsdump __P((dev_t, daddr_t, caddr_t, size_t));
struct cfattach ts_ca = {
sizeof(struct ts_softc), tsmatch, tsattach
};
extern struct cfdriver ts_cd;
#define ST_INVALID 0 /* uninitialized, before probe */
#define ST_PROBE 1 /* during tsprobe(), not used */
#define ST_SLAVE 2 /* in tsslave(), init almost complete */
#define ST_ATTACH 3 /* during tsattach(), not used */
#define ST_INITIALIZED 4 /* init completed, set by tsintr() */
#define ST_RUNNING 5
#define ST_IDLE 6
#define ST_BUSY 7
/* Bits in minor device */
#define TS_UNIT(dev) (minor(dev)&03)
#define TS_HIDENSITY 010
#define TS_PRI LOG_INFO
/*
* Since we don't have credits and thus only one operation per time,
* we don't have and don't need queues like MSCP/TMSCP use them.
* Per controller we only need one internal buffer for ioctls and
* two pointers to buffers to simulate similiar behaviour ...
*/
struct buf ts_cbuf[NTS]; /* internal cmd buffer (for ioctls) */
struct buf *ts_wtab[NTS]; /* dummy I/O wait queue */
#define b_ubinfo b_resid /* Unibus mapping info, per buffer */
/*----------------------------------------------------------------------*/
/*
* Initialize a TS device. Set up UBA mapping registers,
* initialize data structures, what else ???
*/
int
tsinit (sc)
struct ts_softc *sc;
{
volatile struct tsdevice *tsregs;
int unit = sc->sc_dev.dv_unit;
struct uba_unit *uu;
uu = &sc->sc_unit;
tsregs = (struct tsdevice *)ts[unit].reg;
if (sc->sc_mapped == 0) {
/*
* Map the communications area and command and message
* buffer into Unibus address space.
*/
sc->sc_ubainfo = uballoc((struct uba_softc *)
sc->sc_dev.dv_parent,
(caddr_t)&ts[unit], sizeof (struct ts), TS_UBAFLAGS);
sc->sc_ts = (struct ts *)(UBAI_ADDR(sc->sc_ubainfo));
sc->sc_mapped = 1;
}
/*
* bertram: start hardware initialization ??????
*/
/* tsreset(unit); */
return (1);
}
/*
* send a command using the default command-buffer for this unit/controller.
* If a command-word is given, then assemble a one-word command.
* other words in command-buffer are unchanged and must thus be initialized
* before calling this function.
*/
int
tsexec (ctlr, cmd)
int ctlr;
int cmd;
{
register struct ts_softc *sc = ts_cd.cd_devs[ctlr];
register struct tscmd *tscmdp = &ts[ctlr].cmd;
register long tscmdma = (long)&sc->sc_ts->cmd; /* mapped address */
volatile struct tsdevice *tsreg = ts[ctlr].reg;
volatile char *dbx = ((char*)tsreg) + 3;
volatile short sr;
sc->sc_cmdf |= TS_CF_ACK | TS_CF_IE;
tscmdp->cmdr = sc->sc_cmdf | cmd;
tscmdp->cmdr = TS_CF_ACK | TS_CF_IE | sc->sc_cmdf | cmd;
sc->sc_cmdf = 0; /* XXX */
#ifdef DEBUG
switch (tscmdp->cmdr & TS_CF_CMASK) {
case TS_CMD_RNF: cmdName = "Read Next (Forward)"; break;
case TS_CMD_RPR: cmdName = "Read Previous (Reverse)"; break;
case TS_CMD_WCHAR: cmdName = "Write Characteristics"; break;
case TS_CMD_WD: cmdName = "Write Data (Next)"; break;
case TS_CMD_WDR: cmdName = "Write Data (Retry)"; break;
case TS_CMD_SRF: cmdName = "Space Records Forward"; break;
case TS_CMD_SRR: cmdName = "Space Records Reverse"; break;
case TS_CMD_STMF: cmdName = "Skip Tape Marks Forward"; break;
case TS_CMD_STMR: cmdName = "Skip Tape Marks Reverse"; break;
case TS_CMD_RWND: cmdName = "Rewind"; break;
case TS_CMD_WTM: cmdName = "Write Tape Mark"; break;
case TS_CMD_WTMR: cmdName = "Write Tape Mark (Retry)"; break;
case TS_CMD_STAT: cmdName = "Get Status (END)"; break;
default: cmdName = "unexptected Command"; break;
}
#endif
sr = tsreg->tssr;
if ((sr & TS_SSR) == 0) { /* subsystem NOT ready */
printf ("%s%d: subsystem not ready [%x]\n",
sc->sc_dev.dv_xname, sr);
return (-1);
}
dbx = ((char*)tsreg) + 3; /* dbx is located at the fourth byte */
*dbx = (tscmdma >> 18) & 0x0F; /* load bits 18-21 into dbx */
/* possible race-condition with ATTN !!! */
sr = tsreg->tssr;
if ((sr & TS_RMR) != 0) { /* Register modification Refused */
printf ("ts: error writing TSDBX\n");
return (-1);
}
/* now load bits 15-2 at pos 15-2 and bits 17,16 at pos 1,0 of TSDB */
tsreg->tsdb = (tscmdma & 0xfffc) | ((tscmdma >> 16) & 0x03);
/*
* wait for SSR or RMR to show up
*/
sr = tsreg->tssr;
if ((sr & TS_SSR) != 0) { /* something went wrong .. */
if (sr & TS_RMR) {
printf ("ts: error writing TSDB (RMR)\n");
return (-1);
}
if (sr & TS_NXM) {
printf ("ts: error writing TSDB (NXM)\n");
return (-1);
}
printf ("ts: error 0x%x while writing TSDB\n", sr);
tsstatus (sr);
return (-1);
}
return (0); /* completed successfully */
}
/*
* Execute a (ioctl) command on the tape drive a specified number of times.
* This routine sets up a buffer and calls the strategy routine which
* issues the command to the controller.
*/
void
tscommand (dev, cmd, count)
register dev_t dev;
int cmd;
int count;
{
register struct buf *bp;
register int s;
trace (("tscommand (%d, %x, %d)\n", TS_UNIT(dev), cmd, count));
s = splbio();
bp = &ts_cbuf[TS_UNIT(dev)];
while (bp->b_flags & B_BUSY) {
/*
* This special check is because B_BUSY never
* gets cleared in the non-waiting rewind case. ???
*/
if (bp->b_bcount == 0 && (bp->b_flags & B_DONE))
break;
bp->b_flags |= B_WANTED;
sleep ((caddr_t)bp, PRIBIO);
/* check MOT-flag !!! */
}
bp->b_flags = B_BUSY | B_READ;
splx(s);
/*
* Load the buffer. The b_count field gets used to hold the command
* count. the b_resid field gets used to hold the command mneumonic.
* These 2 fields are "known" to be "safe" to use for this purpose.
* (Most other drivers also use these fields in this way.)
*/
bp->b_dev = dev;
bp->b_bcount = count;
bp->b_resid = cmd;
bp->b_blkno = 0;
tsstrategy (bp);
/*
* In case of rewind from close, don't wait.
* This is the only case where count can be 0.
*/
if (count == 0) {
debug (("tscommand: direct return, no iowait.\n"));
return;
}
debug (("tscommand: calling iowait ...\n"));;
iowait (bp);
if (bp->b_flags & B_WANTED)
wakeup ((caddr_t)bp);
bp->b_flags &= B_ERROR;
}
/*
* Start an I/O operation on TS05 controller
*/
int
tsstart (sc, bp)
register struct ts_softc *sc;
register struct buf *bp;
{
int ctlr = sc->sc_dev.dv_unit;
volatile struct tsdevice *tsreg = ts[ctlr].reg;
register struct tscmd *tscmdp = &ts[ctlr].cmd;
register struct buf *dp;
volatile int i, itmp;
int ioctl;
int cmd;
if ((dp = ts_wtab[ctlr]) != NULL) {
/*
* There's already a command pending ...
* Either we are called by tsintr or we have missed
* something important (race condition).
*/
/* bertram: ubarelse ??? */
ts_wtab[ctlr] = NULL;
dp->b_flags |= B_ERROR;
iodone (dp);
if (tsreg->tssr & TS_SC) { /* Special Condition; Error */
log (TS_PRI, "%s: tssr 0x%x, state %d\n",
sc->sc_dev.dv_xname, tsreg->tssr, sc->sc_state);
tsinit (sc);
return (-1);
}
/* XXX */
}
/*
* Check if command is an ioctl or not (ie. read or write).
* If it's an ioctl then just set the flags for later use;
* For other commands attempt to setup a buffer pointer.
*/
if (bp == &ts_cbuf[ctlr]) {
ioctl = 1;
} else {
ioctl = 0;
/*
* now we try to map the buffer into uba map space (???)
*/
i = TS_UBAFLAGS;
switch (vax_cputype) {
case VAX_8600:
case VAX_780:
i |= UBA_CANTWAIT;
break;
case VAX_750:
i |= sc->sc_unit.uu_ubinfo | UBA_CANTWAIT;
break;
case VAX_730:
case VAX_78032:
i |= UBA_CANTWAIT;
break;
default:
printf ("unsupported cpu %d in tsstart.\n", vax_cputype);
} /* end switch (vax_cputype) */
if ((i = ubasetup(sc->sc_dev.dv_parent->dv_unit, bp, i)) == 0) {
/*
* For some reasons which I don't (yet? :) understand,
* tmscp.c initiates in this situation a GET-UNIT
* command. (Because no data-buffers are neccess. ??)
*/
cmd = TS_CMD_STAT;
goto do_cmd;
return (-1); /* ??? */
}
#if defined(VAX750)
if (vax_cputype == VAX_750)
itmp = i & 0xfffffff; /* mask off bdp */
else
#endif
itmp = i;
/* XXX */
}
/*
* If it's an ioctl command, then assemble the command.
* The "b_resid" field holds the command-number as defined
* in <sys/mtio.h>
*/
if (ioctl) {
switch ((int)bp->b_resid) {
case MTWEOF:
cmd = TS_CMD_WTM;
break;
case MTFSF:
cmd = TS_CMD_STMF;
tscmdp->cw1 = bp->b_bcount;
break;
case MTBSF:
cmd = TS_CMD_STMR;
tscmdp->cw1 = bp->b_bcount;
break;
case MTFSR:
cmd = TS_CMD_SRF;
tscmdp->cw1 = bp->b_bcount;
break;
case MTBSR:
cmd = TS_CMD_SRR;
tscmdp->cw1 = bp->b_bcount;
break;
case MTREW:
cmd = TS_CMD_RWND;
#ifndef TS11_COMPAT
if (bp->b_bcount == 0) {
cmd = TS_CMD_RWII;
}
#endif
break;
case MTOFFL:
cmd = TS_CMD_RWUL;
break;
case MTNOP:
cmd = TS_CMD_STAT;
break;
default:
printf ("%s: bad ioctl %d\n", sc->sc_dev.dv_xname,
(int)bp->b_resid);
/* Need a no-op. get status */
cmd = TS_CMD_STAT;
} /* end switch (bp->b_resid) */
} else { /* Its a read/write command (not an ioctl) */
tscmdp->cw1 = UBAI_ADDR(i) & 0xffff;
tscmdp->cw2 = (UBAI_ADDR(i) >> 16) & 0x3f;
tscmdp->cw3 = bp->b_bcount;
if (bp->b_flags & B_READ) {
cmd = TS_CMD_RNF;
}
else {
cmd = TS_CMD_WD;
}
bp->b_ubinfo = itmp; /* save mapping info */
}
/*
* Move buffer to I/O wait pseudo-queue
*/
if (ts_wtab[ctlr]) {
/*
* we are already waiting for something ...
* this should not happen, so we have a problem now.
* bertram: set error-flag and call iodone() ???
*/
}
ts_wtab[ctlr] = bp;
/*
* Now that the command-buffer is setup, give it to the controller
*/
do_cmd:
return (tsexec(ctlr, cmd));
}
/*
* initialize the controller by sending WRITE CHARACTERISTICS command.
* contents of command- and message-buffer are assembled during this
* function.
*/
int
tswchar (ctlr)
int ctlr;
{
struct ts_softc *sc = ts_cd.cd_devs[ctlr];
volatile struct tsdevice *tsregs = ts[ctlr].reg;
volatile struct tscmd *tscmdp = &ts[ctlr].cmd;
volatile struct tsmsg *tsmsgp = &ts[ctlr].msg;
volatile unsigned int sr, ma, timeout;
/*
* assemble and send "WRITE CHARACTERISTICS" command
*/
ma = (long)tsmsgp;
if (ma & 0x7FC00001) { /* address must be even and 22-bit */
printf ("invalid address 0x%0x for msg-buffer.\n", ma);
return (-1);
}
tsmsgp->hdr = ma & 0xFFFF; /* low order addr. bits */
tsmsgp->dfl = (ma >> 16) & 0x003F; /* high order addr. bits */
tsmsgp->rbpcr = 16; /* size of message-buffer */
tsmsgp->xst0 = 0; /* chacacteristics mode word */
tsmsgp->xst1 = 0; /* control word (ext.feat.) */
#ifdef TS11_COMPAT
tsmsgp->rbpcr = 14; /* size of message-buffer */
tsmsgp->xst0 = 0; /* chacacteristics mode word */
tsmsgp->xst1 = 0; /* control word (ext.feat.) */
#else
tsmsgp->rbpcr = 16; /* size of extended message buffer */
tsmsgp->xst0 = 0; /* chacacteristics mode word */
tsmsgp->xst1 = 0; /* unit-select */
tsmsgp->xst1 |= TS_WC_HSP; /* high speed */
#endif
#ifdef ENABLE_ESS
tsmsgp->xst0 |= TS_WC_ESS;
#ifdef ENABLE_ENB
tsmsgp->xst0 |= TS_WC_ENB;
#endif
#endif
#ifdef ENABLE_EAI
tsmsgp->xst0 |= TS_WC_EAI;
#ifdef ENABLE_ERI
tsmsgp->xst0 |= TS_WC_ERI;
#endif
#endif
tscmdp->cmdr = TS_CF_ACK | TS_CF_IE | TS_CMD_WCHAR; /* obsolete */
tscmdp->cw1 = ma & 0xFFFF;
tscmdp->cw2 = (ma >> 16) & 0x003F;
tscmdp->cw3 = 10; /* size of charact.-data */
if (tsexec (ctlr, TS_CMD_WCHAR) < 0) {
printf ("%s: write characteristics command failed [%x]\n",
sc->sc_dev.dv_xname, tsregs->tssr);
return (-1);
}
timeout = 1000; /* timeout in 10 seconds */
do {
DELAY(10000);
sr = tsregs->tssr;
debug10 (("\ttssr: 0x%x\n", sr));
if (timeout-- > 0) {
printf ("timeout during initialize.");
tsstatus (sr);
return (-1);
}
} while ((sr & TS_SSR) == 0);
tsstatus (sr);
return (0);
}
/*
*
*/
void
tsreset(ctlr)
int ctlr;
{
struct ts_softc *sc = ts_cd.cd_devs[ctlr];
volatile struct tsdevice *tsreg = ts[ctlr].reg;
volatile unsigned int sr, timeout;
/*
* reset ctlr by writing into TSSR, then write characteristics
*/
timeout = 1000; /* timeout in 10 seconds */
tsreg->tssr = 0; /* start initialization */
do {
DELAY(10000);
sr = tsreg->tssr;
debug10 (("\ttssr: 0x%x\n", sr));
if (timeout-- > 0) {
if (sr != 0)
printf ("%s: timeout waiting for TS_SSR\n",
sc->sc_dev.dv_xname);
tsstatus (sr);
return;
}
} while ((sr & TS_SSR) == 0); /* wait until subsystem ready */
tsstatus (sr);
return;
}
/*
* probe for device. If found, try to raise an interrupt.
* XXX - most of this should be done in the attach routine.
*/
int
tsmatch(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct ts_softc *sc = match;
struct uba_softc *uh = (void *)parent;
struct uba_attach_args *ua = aux;
struct tsdevice *tsregs = (struct tsdevice*)ua->ua_addr;
volatile unsigned int sr, timeout, count;
int ctlr = sc->sc_dev.dv_unit;
ts_wtab[ctlr] = NULL;
sc->sc_ts = &ts[ctlr];
sc->sc_state = ST_PROBE;
sc->sc_flags = 0;
ts[ctlr].reg = (struct tsdevice*)ua->ua_addr;
/*
* Set host-settable interrupt vector.
* Assign 0 to the TSSR register to start the ts-device initialization.
* The device is not really initialized at this point, this is just to
* find out if the device exists.
*/
sc->sc_ivec = (uh->uh_lastiv -= 4);
count = 0;
again:
timeout = 1000; /* timeout in 10 seconds */
tsregs->tssr = 0; /* start initialization */
do {
DELAY(10000);
sr = tsregs->tssr;
debug10 (("\ttssr-1: 0x%x\n", sr));
if (timeout-- > 0) {
if (sr != 0) /* the device exists !!! */
printf ("%s: timeout waiting for TS_SSR\n",
sc->sc_dev.dv_xname);
tsstatus (sr);
goto bad;
}
} while ((sr & TS_SSR) == 0); /* wait until subsystem ready */
tsstatus (sr);
tswchar (ctlr); /* write charact. to enable interrupts */
/* completion of this will raise the intr. */
#ifdef notyet
sc->sc_ipl = br = qbgetpri();
#else
sc->sc_ipl = 0x15;
#endif
return (sizeof (struct tsdevice));
bad: if (++count < 3)
goto again;
#ifdef notyet
splx(s);
#endif
return (0);
}
/*
* Try to find a slave (a drive) on the controller.
* Since there's only one drive per controller there's nothing to do.
* (we could check the status of the drive (online/offline/...)
*/
void
tsattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct ts_softc *sc = (void *)self;
int ctlr = sc->sc_dev.dv_unit;
struct tsmsg *tsmsgp = &ts[ctlr].msg;
trace (("tsslave (%x, %x)\n", ui, reg));
/*
* write the characteristics (again)
* This will raise an interrupt during ST_SLAVE which indicates
* completion of initialization ...
*/
sc->sc_state = ST_SLAVE; /* tsintr() checks this ... */
if (tswchar (ctlr) < 0) {
printf ("%s: cannot initialize", sc->sc_dev.dv_xname);
}
sc->sc_micro = (tsmsgp->xst2 & TS_SF_MCRL) >> 2;
printf ("%s: rev %d, extended features %s, transport %s\n",
sc->sc_dev.dv_xname, sc->sc_micro,
(tsmsgp->xst2 & TS_SF_EFES ? "enabled" : "disabled"),
(ts[ctlr].reg->tssr & TS_OFL ? "offline" : "online"));
tsinit (sc); /* must be called once, why not here ? */
}
/*
* TSV05/TS05 interrupt routine
*/
void
tsintr(ctlr)
int ctlr;
{
register struct ts_softc *sc = ts_cd.cd_devs[ctlr];
register struct tsmsg *tsmsgp = &ts[ctlr].msg;
register struct tscmd *tscmdp = &ts[ctlr].cmd;
volatile struct tsdevice *tsreg = ts[ctlr].reg;
struct uba_unit *um = &sc->sc_unit;
register struct buf *bp;
unsigned short sr = tsreg->tssr; /* save TSSR */
unsigned short mh = tsmsgp->hdr; /* and msg-header */
/* clear the message header ??? */
short ccode = tscmdp->cmdr & TS_CF_CCODE;
short cmask = tscmdp->cmdr & TS_CF_CMASK;
#ifdef DEBUG
{
char bits[64];
printf ("TSSR: %s, MSG: %x ", bitmask_snprintf(sr,
TS_TSSR_BITS, bits, sizeof(bits)), mh);
}
switch (tsmsgp->hdr & 0x001F) {
case 16: printf ("(End)"); break;
case 17: printf ("(Fail)"); break;
case 18: printf ("(Error)"); break;
case 19: printf ("(Attention)"); break;
}
#endif
trace ((" tsintr (%d, %d, %d, %x)\n", uba, vector, level, ctlr));
if (tsmsgp->xst0 & TS_SF_VCK)
sc->sc_cmdf |= TS_CF_CVC;
#ifdef QBA /* copied from uda.c */
if(vax_cputype == VAX_78032)
splx(sc->sc_ipl); /* Qbus interrupt protocol is odd */
#endif
/*
* There are two different things which can (and should) be checked:
* the actual (internal) state and the device's result (tssr/msg.hdr)
*
* For each state there's only one "normal" interrupt. Anything else
* has to be checked more intensively. Thus in a first run according
* to the internal state the expected interrupt is checked/handled.
*
* In a second run the remaining (not yet handled) interrupts are
* checked according to the drive's result.
*/
switch (sc->sc_state) {
case ST_INVALID:
/*
* Ignore unsolicited interrupts.
*/
log (LOG_WARNING, "%s: stray intr [%x,%x]\n",
sc->sc_dev.dv_xname, sr, mh);
return;
case ST_SLAVE:
/*
* this interrupt was caused by write-charact. command
* issued by tsslave() and indicates the end of the
* initialization phase. Just ignore it ...
*/
if ((sr & TS_SC) != 0 || (sr & TS_TC) != TS_TC_NORM) {
printf("%s: problem during init [%x,%x]\n",
sc->sc_dev.dv_xname, sr, mh);
/* return here ??? */
/* break and check the error outside switch ??? */
break;
}
sc->sc_state = ST_RUNNING;
return;
case ST_RUNNING:
/*
* Here we expect interrupts indicating the end of
* commands or indicating problems.
*/
/*
* Anything else is handled outside this switch ...
*/
break;
case ST_IDLE:
break;
default:
printf ("%s: unexpected interrupt during state %d [%x,%x]\n",
sc->sc_dev.dv_xname, sc->sc_state, sr, mh);
return;
}
/*
* now we check the termination class.
*/
switch (sr & TS_TC) {
case TS_TC_NORM:
/*
* Normal termination -- The operation is completed
* witout incident.
*/
sc->sc_state = ST_IDLE; /* XXX ??? */
sc->sc_state = ST_RUNNING;
sc->sc_liowf = (ccode == TS_CC_WRITE);
sc->sc_rtc = 0;
if ((bp = ts_wtab[ctlr]) != NULL) {
ts_wtab[ctlr] = NULL; /* pseudo-unlink */
if (bp != &ts_cbuf[ctlr]) { /* no ioctl */
ubarelse((struct uba_softc *)
sc->sc_dev.dv_parent,
(int *)&bp->b_ubinfo);
#if defined(VAX750)
if (vax_cputype == VAX_750 &&
sc->sc_unit.uu_ubinfo != 0)
ubarelse((struct uba_softc *)
sc->sc_dev.dv_parent,
&sc->sc_unit.uu_ubinfo);
/* XXX */
#endif
}
bp->b_resid = tsmsgp->rbpcr;
debug (("tsintr: iodone(NORM) [%d,%d,%d]\n",
bp->b_resid, bp->b_bcount, tsmsgp->rbpcr));
iodone (bp); /* bertram: ioctl ??? */
}
return;
case TS_TC_ATTN:
/*
* Attention condition -- this code indicates that the
* drive has undergone a status change, such as going
* off-line or coming on-line.
* (Without EAI enabled, no Attention interrupts occur.
* drive status changes are signaled by the VCK flag.)
*/
return;
case TS_TC_TSA:
/*
* Tape Status Alert -- A status condition is encountered
* that may have significance to the program. Bits of
* interest in the extended status registers include
* TMK, EOT and RLL.
*/
debug (("Tape Status Alert\n"));
tsxstatus (tsmsgp);
if (tsmsgp->xst0 & TS_SF_TMK) {
debug (("Tape Mark detected"));
}
if (tsmsgp->xst0 & TS_SF_EOT) {
debug (("End of Tape"));
}
break;
case TS_TC_FR:
/*
* Function Reject -- The specified function was not
* initiated. Bits of interest include OFL, VCK, BOT,
* WLE, ILC and ILA.
*/
debug (("Function reject\n"));
tsxstatus (tsmsgp);
if (sr & TS_OFL) {
printf ("tape is off-line.\n");
break;
}
if (tsmsgp->xst0 & TS_SF_VCK) {
printf ("Volume check: repeating command ...\n");
tsexec (ctlr, tscmdp->cmdr);
return;
}
if (tsmsgp->xst0 & TS_SF_BOT) {
printf ("bottom of tape.\n");
}
if (tsmsgp->xst0 & TS_SF_WLE) {
printf ("Write Lock Error\n");
}
break;
case TS_TC_TPD:
/*
* Recoverable Error -- Tape position is a record beyond
* what its position was when the function was initiated.
* Suggested recovery procedure is to log the error and
* issue the appropriate retry command.
*/
debug (("Tape position down\n"));
switch (cmask) {
case TS_CMD_RNF: /* Read Next (forward) */
debug (("retry read forward ...\n"));
sc->sc_rtc = 1;
tsexec (ctlr, TS_CMD_RPF);
return;
case TS_CMD_RPR: /* Read Previous (Reverse) */
debug (("retry read reverse ...\n"));
sc->sc_rtc = 1;
tsexec (ctlr, TS_CMD_RNR);
return;
case TS_CMD_WD: /* Write Data (Next) */
debug (("retry write data ...\n"));
sc->sc_rtc = 1;
tsexec (ctlr, TS_CMD_WDR);
return;
case TS_CMD_WTM:
debug (("retry write tape mark ...\n"));
sc->sc_rtc = 1;
tsexec (ctlr, TS_CMD_WTMR);
return;
default:
debug (("TPD in command %x\n", cmask));
}
break;
case TS_TC_TNM:
/*
* Recoverable Error -- Tape position has not changed.
* Suggested recovery procedure is to log the error and
* reissue the original command.
*/
printf ("Tape not moved\n");
if (sc->sc_rtc < 3) {
sc->sc_rtc++;
/* bertram: log the error !!! */
printf ("retrying command %x (%d)\n",
tscmdp->cmdr, sc->sc_rtc);
tsexec (ctlr, tscmdp->cmdr);
return;
}
break;
case TS_TC_TPL:
/*
* Unrecoverable Error -- Tape position has been lost.
* No valid recovery procedures exist unless the tape
* has labels or sequence numbers.
*/
printf ("Tape position lost\n");
break;
case TS_TC_FCE:
/*
* Fatal subsytem Error -- The subsytem is incapable
* of properly performing commands, or at least its
* integrity is seriously questionable. Refer to the
* fatal class code field in the TSSR register for
* additional information on the type of fatal error.
*/
printf ("Fatal Controller Error\n");
default:
printf ("%s: error 0x%x, resetting controller\n",
sc->sc_dev.dv_xname, sr & TS_TC);
tsreset (ctlr);
}
/*
* reset controller ?? call tsinit() ???
*/
if ((bp = ts_wtab[ctlr]) != NULL) {
ts_wtab[ctlr] = NULL; /* pseudo unlink */
if (bp != &ts_cbuf[ctlr]) /* no ioctl */
ubarelse((struct uba_softc *)sc->sc_dev.dv_parent,
(int *)&bp->b_ubinfo);
if ((sr & TS_TC) != TS_TC_NORM)
bp->b_flags |= B_ERROR;
debug (("resid:%d, count:%d, rbpcr:%d\n",
bp->b_resid, bp->b_bcount, tsmsgp->rbpcr));
bp->b_resid = tsmsgp->rbpcr; /* XXX */
debug (("tsintr: iodone(%x)\n", bp->b_flags));
iodone (bp);
}
if ((sr & TS_TC) > TS_TC_FR)
tsreset (ctlr);
return;
}
/*
* Open a ts device and set the unit online. If the controller is not
* in the run state, call init to initialize the ts controller first.
*/
int
tsopen (dev, flag, type, p)
dev_t dev;
int flag, type;
struct proc *p;
{
register struct uba_device *ui;
register struct uba_ctlr *um;
register struct ts_softc *sc;
register int unit = TS_UNIT(dev);
int s;
trace (("tsopen (%x, %x)\n", dev, flag));
if (unit >= ts_cd.cd_ndevs)
return ENXIO;
sc = ts_cd.cd_devs[unit];
if (sc == 0)
return ENXIO;
if (sc->sc_openf)
return EBUSY;
sc->sc_openf = 1;
s = splbio ();
if (sc->sc_state < ST_RUNNING) { /* XXX */
printf ("%s not running.\n", sc->sc_dev.dv_xname);
(void) splx (s);
sc->sc_openf = 0;
return (ENXIO);
}
(void) splx (s);
/*
* check if transport is really online.
* (without attention-interrupts enabled, we really don't know
* the actual state of the transport. Thus we call get-status
* (ie. MTNOP) once and check the actual status.)
*/
tscommand (dev, MTNOP, 1);
if (ts[unit].reg->tssr & TS_OFL) {
printf ("%s: transport is offline.\n", sc->sc_dev.dv_xname);
sc->sc_openf = 0;
return EIO; /* transport is offline */
}
sc->sc_liowf = 0;
return 0;
}
/*
* Close tape device.
*
* If tape was open for writing or last operation was
* a write, then write two EOF's and backspace over the last one.
* Unless this is a non-rewinding special file, rewind the tape.
*
* Make the tape available to others, by clearing openf flag.
*/
int
tsclose (dev, flag, type, p)
dev_t dev;
int flag, type;
struct proc *p;
{
register struct ts_softc *sc = ts_cd.cd_devs[TS_UNIT(dev)];
if (flag == FWRITE || ((flag & FWRITE) && sc->sc_liowf)) {
/*
* We are writing two tape marks (EOT), but place the tape
* before the second one, so that another write operation
* will overwrite the second one and leave and EOF-mark.
*/
tscommand (dev, MTWEOF, 1); /* Write Tape Mark */
tscommand (dev, MTWEOF, 1); /* Write Tape Mark */
tscommand (dev, MTBSF, 1); /* Skip Tape Marks Reverse */
}
if ((dev & T_NOREWIND) == 0)
tscommand (dev, MTREW, 0);
sc->sc_openf = 0;
sc->sc_liowf = 0;
return 0;
}
/*
* Manage buffers and perform block mode read and write operations.
*/
void
tsstrategy (bp)
register struct buf *bp;
{
register int unit = TS_UNIT(bp->b_dev);
struct ts_softc *sc = (void *)ts_cd.cd_devs[unit];
int s;
s = splbio ();
/*
* we have only one command at one time, no credits.
* thus we don't need buffer management and controller queue
* just try to execute the command ...
*/
tsstart (sc, bp);
splx(s);
return;
}
/*
* Catch ioctl commands, and call the "command" routine to do them.
*/
int
tsioctl (dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
register struct buf *bp = &ts_cbuf[TS_UNIT(dev)];
register struct ts_softc *sc;
register struct mtop *mtop; /* mag tape cmd op to perform */
register struct mtget *mtget; /* mag tape struct to get info in */
register callcount; /* number of times to call routine */
int scount; /* number of files/records to space */
int spaceop = 0; /* flag for skip/space operation */
int error = 0;
trace (("tsioctl (%x, %x, %x, %d)\n", dev, cmd, data, flag));
switch (cmd) {
case MTIOCTOP: /* do a mag tape op */
mtop = (struct mtop *)data;
switch (mtop->mt_op) {
case MTWEOF: /* write an end-of-file record */
callcount = mtop->mt_count;
scount = 1;
break;
case MTFSF: /* forward space file */
case MTBSF: /* backward space file */
case MTFSR: /* forward space record */
case MTBSR: /* backward space record */
spaceop = 1;
callcount = 1;
scount = mtop->mt_count;
break;
case MTREW: /* rewind */
case MTOFFL: /* rewind and put the drive offline */
case MTNOP: /* no operation, sets status only */
callcount = 1;
scount = 1; /* wait for this rewind */
break;
case MTRETEN: /* retension */
case MTERASE: /* erase entire tape */
case MTEOM: /* forward to end of media */
case MTNBSF: /* backward space to begin of file */
case MTCACHE: /* enable controller cache */
case MTNOCACHE: /* disable controller cache */
case MTSETBSIZ: /* set block size; 0 for variable */
case MTSETDNSTY: /* set density code for current mode */
debug (("ioctl %d not implemented.\n", mtop->mt_op));
return (ENXIO);
default:
debug (("invalid ioctl %d\n", mtop->mt_op));
return (ENXIO);
} /* switch (mtop->mt_op) */
if (callcount <= 0 || scount <= 0) {
debug (("invalid values %d/%d\n", callcount, scount));
return (EINVAL);
}
do {
tscommand (dev, mtop->mt_op, scount);
if (spaceop && bp->b_resid) {
debug (("spaceop didn't complete\n"));
return (EIO);
}
if (bp->b_flags & B_ERROR) {
debug (("error in ioctl %d\n", mtop->mt_op));
break;
}
} while (--callcount > 0);
if (bp->b_flags & B_ERROR)
if ((error = bp->b_error) == 0)
return (EIO);
return (error);
case MTIOCGET: /* get tape status */
sc = ts_cd.cd_devs[TS_UNIT(dev)];
mtget = (struct mtget *)data;
mtget->mt_type = MT_ISTS;
mtget->mt_dsreg = (unsigned)(ts[TS_UNIT(dev)].reg->tssr);
mtget->mt_erreg = (unsigned)(ts[TS_UNIT(dev)].msg.hdr);
mtget->mt_resid = 0; /* ??? */
mtget->mt_density = 0; /* ??? */
break;
case MTIOCIEOT: /* ignore EOT error */
debug (("MTIOCIEOT not implemented.\n"));
return (ENXIO);
case MTIOCEEOT: /* enable EOT error */
debug (("MTIOCEEOT not implemented.\n"));
return (ENXIO);
default:
debug (("invalid ioctl cmd 0x%x\n", cmd));
return (ENXIO);
}
return (0);
}
/*
*
*/
int
tsread (dev, uio)
dev_t dev;
struct uio *uio;
{
return (physio (tsstrategy, NULL, dev, B_READ, minphys, uio));
}
/*
*
*/
int
tswrite (dev, uio)
dev_t dev;
struct uio *uio;
{
return (physio (tsstrategy, NULL, dev, B_WRITE, minphys, uio));
}
/*
*
*/
int
tsdump(dev, blkno, va, size)
dev_t dev;
daddr_t blkno;
caddr_t va;
size_t size;
{
trace (("tsdump (%x)\n", dev));
return 0;
}
/*----------------------------------------------------------------------*/
int
tsstatus (sr)
int sr;
{
#ifdef DEBUG
char bits[64];
debug (("status: TSSR=%s\n", bitmask_snprintf(sr, TS_TSSR_BITS,
bits, sizeof(bits))));
if (tsdebug < 5)
return (0);
if (sr & TS_SC) printf ("special condition\n");
if (sr & TS_UPE) printf ("UPE\n");
if (sr & TS_SCE) printf ("Sanity Check Error\n");
if (sr & TS_RMR) printf ("Register Modification Refused\n");
if (sr & TS_NXM) printf ("Nonexistent Memory\n");
if (sr & TS_NBA) printf ("Need Buffer Address\n");
if (sr & TS_A11) printf ("Address Bits 17-16\n");
if (sr & TS_SSR) printf ("Subsystem Ready\n");
if (sr & TS_OFL) printf ("Off Line\n");
if (sr & TS_FTC) printf ("Fatal Termination Class Code\n");
switch (sr & TS_TC) {
case TS_TC_NORM: printf ("Normal Termination\n"); break;
case TS_TC_ATTN: printf ("Attention Condition\n"); break;
case TS_TC_TSA: printf ("Tape status \n"); break;
case TS_TC_FR: printf ("Function reject\n"); break;
case TS_TC_TPD: printf ("Tape position down\n"); break;
case TS_TC_TNM: printf ("Tape not moved\n"); break;
case TS_TC_TPL: printf ("Tape position lost\n"); break;
case TS_TC_FCE: printf ("Fatal Controller Error\n"); break;
}
#endif
return (0);
}
void
tsxstatus (mp)
struct tsmsg *mp;
{
#ifdef DEBUG
char bits[64];
debug (("tsxstatus: xst0=%s, ", bitmask_snprintf(mp->xst0,
TS_XST0_BITS, bits, sizeof(bits))));
debug (("xst1=%s, ", bitmask_snprintf(mp->xst1, TS_XST1_BITS,
bits, sizeof(bits))));
debug (("xst2=%s, ", bitmask_snprintf(mp->xst2, TS_XST2_BITS,
bits, sizeof(bits))));
debug (("xst3=%s, ", bitmask_snprintf(mp->xst3, TS_XST3_BITS,
bits, sizeof(bits))));
debug (("xst4=%s\n", bitmask_snprintf(mp->xst4, "\20",
bits, sizeof(bits))));
if (tsdebug < 10)
return (0);
if (mp->xst0 & TS_SF_TMK) printf ("Tape Mark Detected\n");
if (mp->xst0 & TS_SF_RLS) printf ("Record Length Short\n");
if (mp->xst0 & TS_SF_LET) printf ("Logical End of Tape\n");
if (mp->xst0 & TS_SF_RLL) printf ("Record Length Long\n");
if (mp->xst0 & TS_SF_WLE) printf ("Write Lock Error\n");
if (mp->xst0 & TS_SF_NEF) printf ("Nonexecutable Function\n");
if (mp->xst0 & TS_SF_ILC) printf ("Illegal Command\n");
if (mp->xst0 & TS_SF_ILA) printf ("Illegal Address\n");
if (mp->xst0 & TS_SF_MOT) printf ("Motion\n");
if (mp->xst0 & TS_SF_ONL) printf ("On-Line\n");
if (mp->xst0 & TS_SF_IE) printf ("Interrupt Enable\n");
if (mp->xst0 & TS_SF_VCK) printf ("Volume Check\n");
if (mp->xst0 & TS_SF_PED) printf ("Phase Encoded Drive\n");
if (mp->xst0 & TS_SF_WLK) printf ("Write Locked\n");
if (mp->xst0 & TS_SF_BOT) printf ("Beginning of Tape\n");
if (mp->xst0 & TS_SF_EOT) printf ("End of Tape\n");
if (mp->xst1 & TS_SF_DLT) printf ("Data Late\n");
if (mp->xst1 & TS_SF_COR) printf ("Correctable Data\n");
if (mp->xst1 & TS_SF_RBP) printf ("Read Bus Parity Error\n");
if (mp->xst1 & TS_SF_UNC) printf ("Uncorrectable Data or Hard Error\n");
if (mp->xst2 & TS_SF_OPM) printf ("Operation in Progress\n");
if (mp->xst2 & TS_SF_RCE) printf ("RAM Checksum Error\n");
if (mp->xst2 & TS_SF_WCF) printf ("Write Clock Failure\n");
if (mp->xst2 & TS_SF_EFES) printf ("extended features enabled\n");
if (mp->xst2 & TS_SF_BES) printf ("Buffering enabled\n");
printf ("micro-code revision level: %d\n", (mp->xst2 & TS_SF_MCRL)>>2);
printf ("unit number: %d\n", (mp->xst2 & TS_SF_UNIT));
if (mp->xst3 & TS_SF_MDE)
printf ("Micro-Diagnostics Error Code: 0x%x\n", mp->xst3 >> 8);
if (mp->xst3 & TS_SF_OPI) printf ("Operation Incomplete\n");
if (mp->xst3 & TS_SF_REV) printf ("Revers\n");
if (mp->xst3 & TS_SF_DCK) printf ("Density Check\n");
if (mp->xst3 & TS_SF_RIB) printf ("Reverse into BOT\n");
if (mp->xst4 & TS_SF_HSP) printf ("High Speed\n");
if (mp->xst4 & TS_SF_RCX) printf ("Retry Count Exceeded\n");
#endif
}
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