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NetBSD/sys/dev/mscp/mscp_tape.c

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/* $NetBSD: mscp_tape.c,v 1.16 2001/11/13 07:38:28 lukem Exp $ */
/*
* Copyright (c) 1996 Ludd, University of Lule}, Sweden.
* 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 at Ludd, University of
* Lule}, Sweden and its contributors.
* 4. The name of the author may not 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 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.
*/
/*
* MSCP tape device driver
*/
/*
* TODO
* Write status handling code.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: mscp_tape.c,v 1.16 2001/11/13 07:38:28 lukem Exp $");
#include <sys/param.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/buf.h>
#include <sys/ioccom.h>
#include <sys/mtio.h>
#include <sys/fcntl.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <dev/mscp/mscp.h>
#include <dev/mscp/mscpreg.h>
#include <dev/mscp/mscpvar.h>
#include "locators.h"
/*
* Drive status, per drive
*/
struct mt_softc {
struct device mt_dev; /* Autoconf struct */
int mt_state; /* open/closed state */
int mt_hwunit; /* Hardware unit number */
int mt_inuse; /* Locks the tape drive for others */
int mt_waswrite; /* Last operation was a write op */
int mt_serex; /* Got serious exception */
int mt_ioctlerr; /* Error after last ioctl */
};
#define MT_OFFLINE 0
#define MT_ONLINE 1
int mtmatch __P((struct device *, struct cfdata *, void *));
void mtattach __P((struct device *, struct device *, void *));
void mtdgram __P((struct device *, struct mscp *, struct mscp_softc *));
void mtiodone __P((struct device *, struct buf *));
int mtonline __P((struct device *, struct mscp *));
int mtgotstatus __P((struct device *, struct mscp *));
int mtioerror __P((struct device *, struct mscp *, struct buf *));
void mtfillin __P((struct buf *, struct mscp *));
int mtopen __P((dev_t, int, int, struct proc *));
int mtclose __P((dev_t, int, int, struct proc *));
void mtstrategy __P((struct buf *));
int mtread __P((dev_t, struct uio *));
int mtwrite __P((dev_t, struct uio *));
int mtioctl __P((dev_t, int, caddr_t, int, struct proc *));
int mtdump __P((dev_t, daddr_t, caddr_t, size_t));
int mtcmd __P((struct mt_softc *, int, int, int));
void mtcmddone __P((struct device *, struct mscp *));
int mt_putonline __P((struct mt_softc *));
struct mscp_device mt_device = {
mtdgram,
mtiodone,
mtonline,
mtgotstatus,
0,
mtioerror,
0,
mtfillin,
mtcmddone,
};
/* This is not good, should allow more than 4 tapes/device type */
#define mtunit(dev) (minor(dev) & T_UNIT)
#define mtnorewind(dev) (dev & T_NOREWIND)
#define mthdensity(dev) (dev & T_1600BPI)
struct cfattach mt_ca = {
sizeof(struct mt_softc), mtmatch, mtattach
};
extern struct cfdriver mt_cd;
/*
* More driver definitions, for generic MSCP code.
*/
int
mtmatch(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
struct drive_attach_args *da = aux;
struct mscp *mp = da->da_mp;
if ((da->da_typ & MSCPBUS_TAPE) == 0)
return 0;
if (cf->cf_loc[MSCPBUSCF_DRIVE] != MSCPBUSCF_DRIVE_DEFAULT &&
cf->cf_loc[MSCPBUSCF_DRIVE] != mp->mscp_unit)
return 0;
return 1;
}
/*
* The attach routine only checks and prints drive type.
*/
void
mtattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct mt_softc *mt = (void *)self;
struct drive_attach_args *da = aux;
struct mscp *mp = da->da_mp;
struct mscp_softc *mi = (void *)parent;
mt->mt_hwunit = mp->mscp_unit;
mi->mi_dp[mp->mscp_unit] = self;
disk_printtype(mp->mscp_unit, mp->mscp_guse.guse_mediaid);
}
/*
* (Try to) put the drive online. This is done the first time the
* drive is opened, or if it has fallen offline.
*/
int
mt_putonline(mt)
struct mt_softc *mt;
{
struct mscp *mp;
struct mscp_softc *mi = (struct mscp_softc *)mt->mt_dev.dv_parent;
volatile int i;
(volatile int)mt->mt_state = MT_OFFLINE;
mp = mscp_getcp(mi, MSCP_WAIT);
mp->mscp_opcode = M_OP_ONLINE;
mp->mscp_unit = mt->mt_hwunit;
mp->mscp_cmdref = (long)&mt->mt_state;
*mp->mscp_addr |= MSCP_OWN | MSCP_INT;
/* Poll away */
i = bus_space_read_2(mi->mi_iot, mi->mi_iph, 0);
if (tsleep(&mt->mt_state, PRIBIO, "mtonline", 240 * hz))
return MSCP_FAILED;
if ((volatile int)mt->mt_state != MT_ONLINE)
return MSCP_FAILED;
return MSCP_DONE;
}
/*
* Open a drive.
*/
/*ARGSUSED*/
int
mtopen(dev, flag, fmt, p)
dev_t dev;
int flag, fmt;
struct proc *p;
{
struct mt_softc *mt;
int unit;
/*
* Make sure this is a reasonable open request.
*/
unit = mtunit(dev);
if (unit >= mt_cd.cd_ndevs)
return ENXIO;
mt = mt_cd.cd_devs[unit];
if (mt == 0)
return ENXIO;
if (mt->mt_inuse)
return EBUSY;
mt->mt_inuse = 1;
if (mt_putonline(mt) == MSCP_FAILED) {
mt->mt_inuse = 0;
return EIO;
}
return 0;
}
/* ARGSUSED */
int
mtclose(dev, flags, fmt, p)
dev_t dev;
int flags, fmt;
struct proc *p;
{
int unit = mtunit(dev);
struct mt_softc *mt = mt_cd.cd_devs[unit];
/*
* If we just have finished a writing, write EOT marks.
*/
if ((flags & FWRITE) && mt->mt_waswrite) {
mtcmd(mt, MTWEOF, 0, 0);
mtcmd(mt, MTWEOF, 0, 0);
mtcmd(mt, MTBSR, 1, 0);
}
if (mtnorewind(dev) == 0)
mtcmd(mt, MTREW, 0, 1);
if (mt->mt_serex)
mtcmd(mt, -1, 0, 0);
mt->mt_inuse = 0; /* Release the tape */
return 0;
}
void
mtstrategy(bp)
struct buf *bp;
{
int unit;
struct mt_softc *mt;
/*
* Make sure this is a reasonable drive to use.
*/
unit = mtunit(bp->b_dev);
if (unit > mt_cd.cd_ndevs || (mt = mt_cd.cd_devs[unit]) == NULL) {
bp->b_error = ENXIO;
goto bad;
}
mt->mt_waswrite = bp->b_flags & B_READ ? 0 : 1;
mscp_strategy(bp, mt->mt_dev.dv_parent);
return;
bad:
bp->b_flags |= B_ERROR;
biodone(bp);
}
int
mtread(dev, uio)
dev_t dev;
struct uio *uio;
{
return (physio(mtstrategy, NULL, dev, B_READ, minphys, uio));
}
int
mtwrite(dev, uio)
dev_t dev;
struct uio *uio;
{
return (physio(mtstrategy, NULL, dev, B_WRITE, minphys, uio));
}
void
mtiodone(usc, bp)
struct device *usc;
struct buf *bp;
{
biodone(bp);
}
/*
* Fill in drive addresses in a mscp packet waiting for transfer.
*/
void
mtfillin(bp, mp)
struct buf *bp;
struct mscp *mp;
{
int unit = mtunit(bp->b_dev);
struct mt_softc *mt = mt_cd.cd_devs[unit];
mp->mscp_unit = mt->mt_hwunit;
if (mt->mt_serex == 2) {
mp->mscp_modifier = M_MD_CLSEX;
mt->mt_serex = 0;
} else
mp->mscp_modifier = 0;
mp->mscp_seq.seq_bytecount = bp->b_bcount;
}
/*
* Handle an error datagram.
*/
void
mtdgram(usc, mp, mi)
struct device *usc;
struct mscp *mp;
struct mscp_softc *mi;
{
if (mscp_decodeerror(usc == NULL?"unconf mt" : usc->dv_xname, mp, mi))
return;
}
/*
* A drive came on line, make sure it really _is_ on line before
* trying to use it.
*/
int
mtonline(usc, mp)
struct device *usc;
struct mscp *mp;
{
struct mt_softc *mt = (void *)usc;
wakeup((caddr_t)&mt->mt_state);
if ((mp->mscp_status & M_ST_MASK) == M_ST_SUCCESS)
mt->mt_state = MT_ONLINE;
return (MSCP_DONE);
}
/*
* We got some (configured) unit's status. Return DONE.
*/
int
mtgotstatus(usc, mp)
struct device *usc;
struct mscp *mp;
{
return (MSCP_DONE);
}
static char *mt_ioerrs[] = {
"invalid command", /* 1 M_ST_INVALCMD */
"command aborted", /* 2 M_ST_ABORTED */
"unit offline", /* 3 M_ST_OFFLINE */
"unknown", /* 4 M_ST_AVAILABLE */
"unknown", /* 5 M_ST_MFMTERR */
"unit write protected", /* 6 M_ST_WRPROT */
"compare error", /* 7 M_ST_COMPERR */
"data error", /* 8 M_ST_DATAERR */
"host buffer access error", /* 9 M_ST_HOSTBUFERR */
"controller error", /* 10 M_ST_CTLRERR */
"drive error", /* 11 M_ST_DRIVEERR */
"formatter error", /* 12 M_ST_FORMATTERR */
"BOT encountered", /* 13 M_ST_BOT */
"tape mark encountered",/* 14 M_ST_TAPEMARK */
"unknown", /* 15 */
"record data truncated",/* 16 M_ST_RDTRUNC */
};
/*
* An I/O error, may be because of a tapemark encountered.
* Check that before failing.
*/
/*ARGSUSED*/
int
mtioerror(usc, mp, bp)
struct device *usc;
struct mscp *mp;
struct buf *bp;
{
struct mt_softc *mt = (void *)usc;
int st = mp->mscp_status & M_ST_MASK;
if (mp->mscp_flags & M_EF_SEREX)
mt->mt_serex = 1;
if (st == M_ST_TAPEMARK)
mt->mt_serex = 2;
else {
if (st && st < 17)
printf("%s: error %d (%s)\n", mt->mt_dev.dv_xname, st,
mt_ioerrs[st-1]);
else
printf("%s: error %d\n", mt->mt_dev.dv_xname, st);
bp->b_flags |= B_ERROR;
bp->b_error = EROFS;
}
return (MSCP_DONE);
}
/*
* I/O controls.
*/
int
mtioctl(dev, cmd, data, flag, p)
dev_t dev;
int cmd;
caddr_t data;
int flag;
struct proc *p;
{
int unit = mtunit(dev);
struct mt_softc *mt = mt_cd.cd_devs[unit];
struct mtop *mtop;
struct mtget *mtget;
int error = 0, count;
count = mtop->mt_count;
switch (cmd) {
case MTIOCTOP:
mtop = (void *)data;
if (mtop->mt_op == MTWEOF) {
while (mtop->mt_count-- > 0)
if ((error = mtcmd(mt, mtop->mt_op, 0, 0)))
break;
} else
error = mtcmd(mt, mtop->mt_op, mtop->mt_count, 0);
case MTIOCGET:
mtget = (void *)data;
mtget->mt_type = MT_ISTMSCP;
/* XXX we need to fill in more fields here */
break;
default:
error = ENXIO;
break;
}
return (error);
}
/*
* No crash dump support...
*/
int
mtdump(dev, blkno, va, size)
dev_t dev;
daddr_t blkno;
caddr_t va;
size_t size;
{
return -1;
}
/*
* Send a command to the tape drive. Wait until the command is
* finished before returning.
* This routine must only be called when there are no data transfer
* active on this device. Can we be sure of this? Or does the ctlr
* queue up all command packets and take them in sequential order?
* It sure would be nice if my manual stated this... /ragge
*/
int
mtcmd(mt, cmd, count, complete)
struct mt_softc *mt;
int cmd, count, complete;
{
struct mscp *mp;
struct mscp_softc *mi = (void *)mt->mt_dev.dv_parent;
volatile int i;
mp = mscp_getcp(mi, MSCP_WAIT);
mt->mt_ioctlerr = 0;
mp->mscp_unit = mt->mt_hwunit;
mp->mscp_cmdref = -1;
*mp->mscp_addr |= MSCP_OWN | MSCP_INT;
switch (cmd) {
case MTWEOF:
mp->mscp_opcode = M_OP_WRITM;
break;
case MTBSF:
mp->mscp_modifier = M_MD_REVERSE;
case MTFSF:
mp->mscp_opcode = M_OP_POS;
mp->mscp_seq.seq_buffer = count;
break;
case MTBSR:
mp->mscp_modifier = M_MD_REVERSE;
case MTFSR:
mp->mscp_opcode = M_OP_POS;
mp->mscp_modifier |= M_MD_OBJCOUNT;
mp->mscp_seq.seq_bytecount = count;
break;
case MTREW:
mp->mscp_opcode = M_OP_POS;
mp->mscp_modifier = M_MD_REWIND | M_MD_CLSEX;
if (complete)
mp->mscp_modifier |= M_MD_IMMEDIATE;
mt->mt_serex = 0;
break;
case MTOFFL:
mp->mscp_opcode = M_OP_AVAILABLE;
mp->mscp_modifier = M_MD_UNLOAD | M_MD_CLSEX;
mt->mt_serex = 0;
break;
case MTNOP:
mp->mscp_opcode = M_OP_GETUNITST;
break;
case -1: /* Clear serious exception only */
mp->mscp_opcode = M_OP_POS;
mp->mscp_modifier = M_MD_CLSEX;
mt->mt_serex = 0;
break;
default:
printf("Bad ioctl %x\n", cmd);
mp->mscp_opcode = M_OP_POS;
break;
}
i = bus_space_read_2(mi->mi_iot, mi->mi_iph, 0);
tsleep(&mt->mt_inuse, PRIBIO, "mtioctl", 0);
return mt->mt_ioctlerr;
}
/*
* Called from bus routines whenever a non-data transfer is finished.
*/
void
mtcmddone(usc, mp)
struct device *usc;
struct mscp *mp;
{
struct mt_softc *mt = (void *)usc;
if (mp->mscp_status) {
mt->mt_ioctlerr = EIO;
printf("%s: bad status %x\n", mt->mt_dev.dv_xname,
mp->mscp_status);
}
wakeup(&mt->mt_inuse);
}
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