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/* $NetBSD: tz.c,v 1.27 2000/01/21 23:29:06 thorpej Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ralph Campbell.
*
* 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.
*
* @(#)tz.c 8.5 (Berkeley) 6/2/95
*
* from: Header: /sprite/src/kernel/dev/RCS/devSCSITape.c,
* v 8.14 89/07/31 17:26:13 mendel Exp SPRITE (Berkeley)
*/
/*
* SCSI CCS (Command Command Set) tape driver.
*/
#include "tz.h"
#if NTZ > 0
#include <sys/param.h>
#include <sys/buf.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/file.h>
#include <sys/kernel.h>
#include <sys/mtio.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/tprintf.h>
#include <machine/conf.h>
#include <pmax/dev/device.h>
#include <pmax/dev/scsi.h>
static int tzprobe __P((void *sd /*struct pmax_scsi_device *sd*/));
static int tzcommand __P((dev_t dev, int command, int code,
int count, caddr_t data));
static void tzstart __P((int unit));
static void tzdone __P((int unit, int error, int resid, int status));
static int tzmount __P((dev_t dev));
struct pmax_driver tzdriver = {
"tz", tzprobe,
(void (*) __P((struct ScsiCmd *cmd))) tzstart,
tzdone,
};
struct tzmodes {
u_int quirks;
u_int8_t density;
};
struct tzquirk {
char *product;
u_int page_0_size;
u_int quirks;
int blklen;
struct tzmodes modes[2]; /* low density, high density */
};
#define TZ_Q_FORCE_BLKSIZE 0x0001
#define TZ_Q_SENSE_HELP 0x0002 /* must do READ for good MODE SENSE */
#define TZ_Q_IGNORE_LOADS 0x0004
#define TZ_Q_BLKSIZE 0x0008 /* variable-block media_blksize > 0 */
#define TZ_Q_UNIMODAL 0x0010 /* unimode drive rejects mode select */
#define TZ_Q_DENSITY 0x0020 /* density codes valid */
#define MAX_PAGE_0_SIZE 64
static struct tz_softc {
struct device sc_dev; /* new config glue */
struct pmax_scsi_device *sc_sd; /* physical unit info */
int sc_flags; /* see below */
int sc_blklen; /* 0 = variable len records */
long sc_numblks; /* number of blocks on tape */
tpr_t sc_ctty; /* terminal for error messages */
daddr_t sc_fileno; /* file number of current position */
daddr_t sc_blkno; /* block number of current position */
struct buf_queue sc_tab; /* queue of pending operations */
int sc_active; /* number of active operations */
struct buf sc_buf; /* buf for doing I/O */
struct buf sc_errbuf; /* buf for doing REQUEST_SENSE */
struct ScsiCmd sc_cmd; /* command for controller */
ScsiGroup0Cmd sc_rwcmd; /* SCSI cmd for read/write */
struct scsi_fmt_cdb sc_cdb; /* SCSI cmd if not read/write */
struct scsi_fmt_sense sc_sense; /* sense data from last cmd */
struct ScsiTapeModeSelectHdr sc_mode; /* SCSI_MODE_SENSE data */
char sc_modelen; /* SCSI_MODE_SENSE data length */
struct tzquirk *sc_quirks; /* quirks for this drive */
} tz_softc[NTZ];
/* sc_flags values */
#define TZF_ALIVE 0x001 /* drive found and ready */
#define TZF_MOUNTED 0x002 /* device is presently mounted */
#define TZF_OPEN 0x004 /* device is open */
#define TZF_SENSEINPROGRESS 0x008 /* REQUEST_SENSE command in progress */
#define TZF_ALTCMD 0x010 /* alternate command in progress */
#define TZF_WRITTEN 0x020 /* tape has been written to */
#define TZF_WAIT 0x040 /* waiting for sc_tab to drain */
#define TZF_SEENEOF 0x080 /* seen file mark on read */
#define TZF_RDONLY 0x100 /* mode sense says write protected */
#define TZF_DONTCOUNT 0x200 /* operation isn't to be counted for sc_blkno */
/* bits in minor device */
#define tzunit(x) (minor(x) >> 4) /* tz%d unit number */
#define TZ_NOREWIND 0x01 /* don't rewind on close */
#define TZ_HIDENSITY 0x02
#define TZ_EXSFMK 0x04
#define TZ_FIXEDBLK 0x08
#ifdef DEBUG
int tzdebug = 0;
#endif
struct tzquirk tz_quirk_table[] = {
{ "EXB-8200", 17, 0, 0, {
{ 0, 0,},
{ 0, 0,}
}},
{ "TZK08", 17, 0, 0, {
{ 0, 0,},
{ 0, 0,}
}},
{ "EXB-8500", 17, 0, 0, {
{ 0, 0,},
{ 0, 0,}
}},
{ "TKZ09", 17, 0, 0, {
{ 0, 0,},
{ 0, 0,}
}},
{ "VIPER 150", 0, TZ_Q_FORCE_BLKSIZE, 512, {
{ 0, 0, },
{ 0, 0, }
}},
{ "5150ES SCSI", 0, TZ_Q_FORCE_BLKSIZE, 512, {
{ 0, 0, },
{ 0, 0, }
}},
/* The next two product ids are faked up in tzprobe() */
{ "TK50 0x30", 14, 0, 0, {
{ 0, 0,},
{ 0, 0,}
}},
{ "MT02", 0, 0, 0, {
{ TZ_Q_DENSITY, 0x4 },
{ TZ_Q_DENSITY, 0 }
}},
};
#define NQUIRKS (sizeof(tz_quirk_table) / sizeof(tz_quirk_table[0]))
/*
* Test to see if device is present.
* Return true if found and initialized ok.
*/
static int
tzprobe(xxxsd)
void *xxxsd;
{
int i;
char vid[9], pid[17], revl[5];
struct pmax_scsi_device *sd = xxxsd;
struct tz_softc *sc = &tz_softc[sd->sd_unit];
ScsiInquiryData inqbuf;
if (sd->sd_unit >= NTZ)
return (0);
BUFQ_INIT(&sc->sc_tab);
/* init some parameters that don't change */
sc->sc_sd = sd;
sc->sc_cmd.sd = sd;
sc->sc_cmd.unit = sd->sd_unit;
sc->sc_cmd.flags = 0;
sc->sc_rwcmd.unitNumber = sd->sd_slave;
/* XXX set up device info */ /* XXX */
bzero(&sc->sc_dev, sizeof(sc->sc_dev)); /* XXX */
sprintf(sc->sc_dev.dv_xname, "tz%d", sd->sd_unit); /* XXX */
sc->sc_dev.dv_unit = sd->sd_unit; /* XXX */
sc->sc_dev.dv_class = DV_TAPE; /* XXX */
sc->sc_fileno = -1;
sc->sc_blkno = -1;
/* try to find out what type of device this is */
sc->sc_flags = TZF_ALTCMD; /* force use of sc_cdb */
sc->sc_cdb.len = sizeof(ScsiGroup0Cmd);
scsiGroup0Cmd(SCSI_INQUIRY, sd->sd_slave, 0, sizeof(inqbuf),
(ScsiGroup0Cmd *)sc->sc_cdb.cdb);
sc->sc_buf.b_flags = B_BUSY | B_READ;
sc->sc_buf.b_bcount = sizeof(inqbuf);
sc->sc_buf.b_un.b_addr = (caddr_t)&inqbuf;
BUFQ_INSERT_HEAD(&sc->sc_tab, &sc->sc_buf);
tzstart(sd->sd_unit);
if (biowait(&sc->sc_buf) ||
(i = sizeof(inqbuf) - sc->sc_buf.b_resid) < 5)
goto bad;
if (inqbuf.type != SCSI_TAPE_TYPE || !inqbuf.rmb)
goto bad;
/* check for device ready to clear UNIT_ATTN */
sc->sc_cdb.len = sizeof(ScsiGroup0Cmd);
scsiGroup0Cmd(SCSI_TEST_UNIT_READY, sd->sd_slave, 0, 0,
(ScsiGroup0Cmd *)sc->sc_cdb.cdb);
sc->sc_buf.b_flags = B_BUSY | B_READ;
sc->sc_buf.b_bcount = 0;
sc->sc_buf.b_un.b_addr = (caddr_t)0;
BUFQ_INSERT_HEAD(&sc->sc_tab, &sc->sc_buf);
tzstart(sd->sd_unit);
(void) biowait(&sc->sc_buf);
sc->sc_flags = TZF_ALIVE;
sc->sc_modelen = 12;
sc->sc_buf.b_flags = 0;
printf("tz%d at %s%d drive %d slave %d", sd->sd_unit,
sd->sd_cdriver->d_name, sd->sd_ctlr, sd->sd_drive,
sd->sd_slave);
if (i == 5 && inqbuf.version == 1 && (inqbuf.qualifier == 0x50 ||
inqbuf.qualifier == 0x30)) {
strcpy(pid, "TK50");
printf(" %s", pid);
if (inqbuf.qualifier == 0x30)
strcpy(pid, "TK50 0x30");
} else if (i >= 5 && inqbuf.version == 1 && inqbuf.qualifier == 0 &&
inqbuf.length == 0) {
/* assume Emultex MT02 controller */
strcpy(pid, "MT02");
printf(" %s", pid);
} else if (inqbuf.version > 2 || i < 36) {
printf(" GENERIC SCSI tape device: qual 0x%x, ver %d",
inqbuf.qualifier, inqbuf.version);
} else {
bcopy((caddr_t)inqbuf.vendorID, (caddr_t)vid, 8);
bcopy((caddr_t)inqbuf.productID, (caddr_t)pid, 16);
bcopy((caddr_t)inqbuf.revLevel, (caddr_t)revl, 4);
for (i = 8; --i > 0; )
if (vid[i] != ' ')
break;
vid[i+1] = 0;
for (i = 16; --i > 0; )
if (pid[i] != ' ')
break;
pid[i+1] = 0;
for (i = 4; --i > 0; )
if (revl[i] != ' ')
break;
revl[i+1] = 0;
printf(" %s %s rev %s (SCSI-%d)", vid, pid, revl,
inqbuf.version);
}
printf("\n");
sc->sc_quirks = NULL;
for (i = 0; i < NQUIRKS; i++) {
if (bcmp(pid, tz_quirk_table[i].product,
strlen(tz_quirk_table[i].product)) == 0) {
sc->sc_quirks = &tz_quirk_table[i];
if (tz_quirk_table[i].quirks & TZ_Q_FORCE_BLKSIZE)
sc->sc_blklen = tz_quirk_table[i].blklen;
if (tz_quirk_table[i].page_0_size > 0) {
sc->sc_modelen = tz_quirk_table[i].page_0_size;
}
break;
}
}
sd->sd_devp = &sc->sc_dev; /* XXX */
TAILQ_INSERT_TAIL(&alldevs, &sc->sc_dev, dv_list); /* XXX */
return (1);
bad:
/* doesn't exist or not a CCS device */
sc->sc_flags = 0;
sc->sc_buf.b_flags = 0;
return (0);
}
/*
* Perform a special tape command on a SCSI Tape drive.
*/
static int
tzcommand(dev, command, code, count, data)
dev_t dev;
int command;
int code;
int count;
caddr_t data;
{
struct tz_softc *sc = &tz_softc[tzunit(dev)];
ScsiGroup0Cmd *c;
int s, error;
s = splbio();
/* wait for pending operations to finish */
while (BUFQ_FIRST(&sc->sc_tab) != NULL) {
sc->sc_flags |= TZF_WAIT;
sleep(&sc->sc_flags, PZERO);
}
sc->sc_flags |= TZF_DONTCOUNT; /* don't count any operations in blkno */
sc->sc_flags |= TZF_ALTCMD; /* force use of sc_cdb */
sc->sc_cdb.len = sizeof(ScsiGroup0Cmd);
c = (ScsiGroup0Cmd *)sc->sc_cdb.cdb;
c->command = command;
c->unitNumber = sc->sc_sd->sd_slave;
c->highAddr = code;
c->midAddr = count >> 16;
c->lowAddr = count >> 8;
c->blockCount = count;
c->control = 0;
if (command == SCSI_MODE_SELECT)
sc->sc_buf.b_flags = B_BUSY;
else {
sc->sc_buf.b_flags = B_BUSY | B_READ;
}
sc->sc_buf.b_bcount = data ? count : 0;
sc->sc_buf.b_un.b_addr = data;
BUFQ_INSERT_HEAD(&sc->sc_tab, &sc->sc_buf);
tzstart(sc->sc_sd->sd_unit);
error = biowait(&sc->sc_buf);
sc->sc_flags &= ~TZF_DONTCOUNT; /* clear don't count flag */
sc->sc_flags &= ~TZF_ALTCMD; /* force use of sc_cdb */
sc->sc_buf.b_flags = 0;
sc->sc_cmd.flags = 0;
if (sc->sc_buf.b_resid)
printf("tzcommand: resid %ld\n", sc->sc_buf.b_resid); /* XXX */
if (error == 0) {
switch (command) {
case SCSI_SPACE:
if (sc->sc_blkno != -1) {
if (code == 0) {
sc->sc_blkno += count;
} else {
sc->sc_fileno += count;
sc->sc_blkno = 0;
}
}
sc->sc_flags &= ~TZF_SEENEOF;
break;
case SCSI_WRITE_EOF:
if (sc->sc_blkno != -1) {
sc->sc_fileno += count;
sc->sc_blkno = 0;
}
sc->sc_flags &= ~TZF_SEENEOF;
break;
case SCSI_LOAD_UNLOAD:
case SCSI_REWIND:
sc->sc_fileno = 0;
sc->sc_blkno = 0;
sc->sc_flags &= ~TZF_SEENEOF;
break;
}
} else {
switch (command) {
case SCSI_SPACE:
case SCSI_WRITE_EOF:
case SCSI_LOAD_UNLOAD:
case SCSI_REWIND:
sc->sc_fileno = -1;
sc->sc_blkno = -1;
}
}
splx(s);
return (error);
}
static void
tzstart(unit)
int unit;
{
struct tz_softc *sc = &tz_softc[unit];
struct buf *bp = BUFQ_FIRST(&sc->sc_tab);
int n;
sc->sc_cmd.buf = bp->b_un.b_addr;
sc->sc_cmd.buflen = bp->b_bcount;
if (sc->sc_flags & (TZF_SENSEINPROGRESS | TZF_ALTCMD)) {
if (bp->b_flags & B_READ)
sc->sc_cmd.flags &= ~SCSICMD_DATA_TO_DEVICE;
else
sc->sc_cmd.flags |= SCSICMD_DATA_TO_DEVICE;
sc->sc_cmd.cmd = sc->sc_cdb.cdb;
sc->sc_cmd.cmdlen = sc->sc_cdb.len;
} else {
if (bp->b_flags & B_READ) {
sc->sc_cmd.flags = 0;
sc->sc_rwcmd.command = SCSI_READ;
sc->sc_flags &= ~TZF_WRITTEN;
} else {
sc->sc_cmd.flags = SCSICMD_DATA_TO_DEVICE;
sc->sc_rwcmd.command = SCSI_WRITE;
sc->sc_flags |= TZF_WRITTEN;
}
sc->sc_cmd.cmd = (u_char *)&sc->sc_rwcmd;
sc->sc_cmd.cmdlen = sizeof(sc->sc_rwcmd);
if (sc->sc_blklen) {
/* fixed sized records */
n = bp->b_bcount / sc->sc_blklen;
if (bp->b_bcount % sc->sc_blklen) {
tprintf(sc->sc_ctty,
"tz%d: I/O not block aligned %d/%ld\n",
unit, sc->sc_blklen, bp->b_bcount);
tzdone(unit, EIO, bp->b_bcount, 0);
}
sc->sc_rwcmd.highAddr = 1;
} else {
/* variable sized records */
n = bp->b_bcount;
sc->sc_rwcmd.highAddr = 0;
}
sc->sc_rwcmd.midAddr = n >> 16;
sc->sc_rwcmd.lowAddr = n >> 8;
sc->sc_rwcmd.blockCount = n;
}
/* tell controller to start this command */
(*sc->sc_sd->sd_cdriver->d_start)(&sc->sc_cmd);
}
/*
* This is called by the controller driver when the command is done.
*/
static void
tzdone(unit, error, resid, status)
int unit;
int error; /* error number from errno.h */
int resid; /* amount not transfered */
int status; /* SCSI status byte */
{
struct tz_softc *sc = &tz_softc[unit];
struct buf *bp = BUFQ_FIRST(&sc->sc_tab);
if (bp == NULL) {
printf("tz%d: bp == NULL\n", unit);
return;
}
if (sc->sc_flags & TZF_SENSEINPROGRESS) {
sc->sc_flags &= ~TZF_SENSEINPROGRESS;
BUFQ_REMOVE(&sc->sc_tab, bp); /* remove sc_errbuf */
bp = BUFQ_FIRST(&sc->sc_tab);
#ifdef DIAGNOSTIC
if (bp == NULL)
panic("tzdone");
#endif
if (error || (status & SCSI_STATUS_CHECKCOND)) {
printf("tz%d: error reading sense data: error %d scsi status 0x%x\n",
unit, error, status);
/*
* We got an error during the REQUEST_SENSE,
* fill in no sense for data.
*/
sc->sc_sense.sense[0] = 0x70;
sc->sc_sense.sense[2] = SCSI_CLASS7_NO_SENSE;
} else if (!cold) {
ScsiClass7Sense *sp;
long resid = 0;
sp = (ScsiClass7Sense *)sc->sc_sense.sense;
if (sp->error7 != 0x70)
goto prerr;
if (sp->valid) {
resid = (sp->info1 << 24) | (sp->info2 << 16) |
(sp->info3 << 8) | sp->info4;
if (sc->sc_blklen)
resid *= sc->sc_blklen;
} else
resid = 0;
switch (sp->key) {
case SCSI_CLASS7_NO_SENSE:
/*
* Hit a filemark, end of media, or
* end of record.
* Fixed length blocks, an error.
*/
if (sp->endOfMedia) {
bp->b_error = ENOSPC;
bp->b_resid = resid;
break;
}
if (sp->fileMark) {
if (sc->sc_fileno != -1) {
sc->sc_fileno++;
sc->sc_blkno = 0;
}
}
if (sc->sc_blklen && sp->badBlockLen) {
tprintf(sc->sc_ctty,
"tz%d: Incorrect Block Length, expected %d got %ld\n",
unit, sc->sc_blklen, resid);
break;
}
if (resid < 0) {
/*
* Variable length records but
* attempted to read less than a
* full record.
*/
tprintf(sc->sc_ctty,
"tz%d: Partial Read of Variable Length Tape Block, expected %ld read %ld\n",
unit, bp->b_bcount - resid,
bp->b_bcount);
bp->b_resid = 0;
break;
}
if (sp->fileMark)
sc->sc_flags |= TZF_SEENEOF;
/*
* Attempting to read more than a record is
* OK. Just record how much was actually read.
*/
bp->b_flags &= ~B_ERROR;
bp->b_error = 0;
bp->b_resid = resid;
break;
case SCSI_CLASS7_UNIT_ATTN:
if (!(sc->sc_flags & TZF_OPEN))
break;
default:
prerr:
printf("tz%d: ", unit);
scsiPrintSense((ScsiClass7Sense *)
sc->sc_sense.sense,
sizeof(sc->sc_sense.sense) - resid);
}
}
} else if (error || (status & SCSI_STATUS_CHECKCOND)) {
#ifdef DEBUG
if (!cold && tzdebug)
printf("tz%d: error %d scsi status 0x%x\n",
unit, error, status);
#endif
/* save error info */
sc->sc_sense.status = status;
bp->b_flags |= B_ERROR;
bp->b_error = error;
bp->b_resid = resid;
if (status & SCSI_STATUS_CHECKCOND) {
/*
* Start a REQUEST_SENSE command.
* Since we are called at interrupt time, we can't
* wait for the command to finish; that's why we use
* the sc_flags field.
*/
sc->sc_flags |= TZF_SENSEINPROGRESS;
sc->sc_cdb.len = sizeof(ScsiGroup0Cmd);
scsiGroup0Cmd(SCSI_REQUEST_SENSE, sc->sc_sd->sd_slave,
0, sizeof(sc->sc_sense.sense),
(ScsiGroup0Cmd *)sc->sc_cdb.cdb);
sc->sc_errbuf.b_flags = B_BUSY | B_PHYS | B_READ;
sc->sc_errbuf.b_bcount = sizeof(sc->sc_sense.sense);
sc->sc_errbuf.b_un.b_addr = (caddr_t)sc->sc_sense.sense;
BUFQ_INSERT_HEAD(&sc->sc_tab, &sc->sc_errbuf);
tzstart(unit);
return;
}
} else {
sc->sc_sense.status = status;
bp->b_resid = resid;
if (!(sc->sc_flags & TZF_DONTCOUNT) && sc->sc_blkno != -1) {
if (sc->sc_blklen != 0)
sc->sc_blkno += bp->b_bcount / sc->sc_blklen;
else
sc->sc_blkno++;
}
}
BUFQ_REMOVE(&sc->sc_tab, bp);
biodone(bp);
if (BUFQ_FIRST(&sc->sc_tab) != NULL)
tzstart(unit);
else {
sc->sc_active = 0;
if (sc->sc_flags & TZF_WAIT) {
sc->sc_flags &= ~TZF_WAIT;
wakeup(&sc->sc_flags);
}
}
}
static int
tzmount(dev)
dev_t dev;
{
int unit = tzunit(dev);
struct tz_softc *sc = &tz_softc[unit];
int densmode, error;
/* clear UNIT_ATTENTION */
error = tzcommand(dev, SCSI_TEST_UNIT_READY, 0, 0, 0);
while (error) {
ScsiClass7Sense *sp = (ScsiClass7Sense *)sc->sc_sense.sense;
/* return error if last error was not UNIT_ATTENTION */
if (!(sc->sc_sense.status & SCSI_STATUS_CHECKCOND) ||
sp->error7 != 0x70 || sp->key != SCSI_CLASS7_UNIT_ATTN)
return (error);
/*
* Try it again just to be sure and
* try to negotiate synchonous transfers.
*/
error = tzcommand(dev, SCSI_TEST_UNIT_READY, 0, 0, 0);
}
if ((sc->sc_flags & TZF_MOUNTED) == 0) {
/* get the current mode settings */
error = tzcommand(dev, SCSI_MODE_SENSE, 0,
sc->sc_modelen, (caddr_t)&sc->sc_mode);
if (error)
return (error);
sc->sc_flags = TZF_ALIVE;
/* *Very* first off, make sure we're loaded to BOT. */
error = tzcommand(dev, SCSI_LOAD_UNLOAD, 0, SCSI_LD_LOAD, 0);
/* In case this doesn't work, do a REWIND instead */
if (error)
error = tzcommand(dev, SCSI_REWIND, 0, 0, 0);
if (error)
return (error);
/* check for write protected tape */
if (sc->sc_mode.writeprot)
sc->sc_flags |= TZF_RDONLY;
else
sc->sc_flags &= ~TZF_RDONLY;
#if 0 /* XXX not the right place! Do we need to check at all? */
if ((flags & FWRITE) && sc->sc_mode.writeprot) {
uprintf("tz%d: write protected\n", unit);
return (EACCES);
}
#endif
/* save total number of blocks on tape */
sc->sc_numblks = (sc->sc_mode.blocks_2 << 16) |
(sc->sc_mode.blocks_1 << 8) | sc->sc_mode.blocks_0;
/* setup for mode select */
sc->sc_mode.len = 0;
sc->sc_mode.media = 0;
sc->sc_mode.bufferedMode = 1;
sc->sc_mode.blocks_0 = 0;
sc->sc_mode.blocks_1 = 0;
sc->sc_mode.blocks_2 = 0;
sc->sc_mode.block_size0 = sc->sc_blklen >> 16;
sc->sc_mode.block_size1 = sc->sc_blklen >> 8;
sc->sc_mode.block_size2 = sc->sc_blklen;
/* check for tape density changes */
densmode = (minor(dev) & TZ_HIDENSITY) ? 1 : 0;
if ((sc->sc_quirks != NULL) &&
(sc->sc_quirks->modes[densmode].quirks & TZ_Q_DENSITY))
sc->sc_mode.density = sc->sc_quirks->modes[densmode].density;
else {
if (densmode != 0)
uprintf("tz%d: Only one density supported\n", unit);
}
/* set the current mode settings */
error = tzcommand(dev, SCSI_MODE_SELECT, 0,
sc->sc_modelen, (caddr_t)&sc->sc_mode);
if (error == 0) {
sc->sc_flags |= TZF_MOUNTED;
sc->sc_fileno = 0;
sc->sc_blkno = 0;
}
}
return(error);
}
/* ARGSUSED */
int
tzopen(dev, flags, type, p)
dev_t dev;
int flags, type;
struct proc *p;
{
int unit = tzunit(dev);
struct tz_softc *sc = &tz_softc[unit];
int error;
if (unit >= NTZ || sc->sc_sd == NULL)
return (ENXIO);
if (!(sc->sc_flags & TZF_ALIVE)) {
/* check again, tape may have been turned off at boot time */
if (!tzprobe(sc->sc_sd))
return (ENXIO);
}
if (sc->sc_flags & TZF_OPEN)
return (EBUSY);
error = tzmount(dev);
if (error)
return (error);
sc->sc_ctty = tprintf_open(p);
sc->sc_flags |= TZF_OPEN;
return (0);
}
int
tzclose(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
struct tz_softc *sc = &tz_softc[tzunit(dev)];
int error = 0;
if (!(sc->sc_flags & TZF_OPEN))
return (0);
if (flag == FWRITE ||
((flag & FWRITE) && (sc->sc_flags & TZF_WRITTEN)))
error = tzcommand(dev, SCSI_WRITE_EOF, 0, 1, 0);
if ((minor(dev) & TZ_NOREWIND) == 0)
(void) tzcommand(dev, SCSI_REWIND, 0, 0, 0);
sc->sc_flags &= ~(TZF_OPEN | TZF_WRITTEN);
tprintf_close(sc->sc_ctty);
return (error);
}
int
tzread(dev, uio, iomode)
dev_t dev;
struct uio *uio;
int iomode;
{
return (physio(tzstrategy, NULL, dev, B_READ, minphys, uio));
}
int
tzwrite(dev, uio, iomode)
dev_t dev;
struct uio *uio;
int iomode;
{
/* XXX: check for hardware write-protect? */
return (physio(tzstrategy, NULL, dev, B_WRITE, minphys, uio));
}
int
tzioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
struct tz_softc *sc = &tz_softc[tzunit(dev)];
struct mtop *mtop;
struct mtget *mtget;
int code, count;
static int tzops[] = {
SCSI_WRITE_EOF, /* MTWEOF */
SCSI_SPACE, /* MTFSF */
SCSI_SPACE, /* MTBSF */
SCSI_SPACE, /* MTFSR */
SCSI_SPACE, /* MTBSR */
SCSI_REWIND, /* MTREW */
SCSI_LOAD_UNLOAD, /* MTOFFL */
SCSI_TEST_UNIT_READY, /* MTNOP */
SCSI_LOAD_UNLOAD, /* MTRETEN */
SCSI_ERASE_TAPE, /* MTERASE */
MTEOM, /* MTEOM */
MTNBSF, /* MTNBSF */
SCSI_TEST_UNIT_READY, /* MTCACHE */
SCSI_TEST_UNIT_READY, /* MTNOCACHE */
MTSETBSIZ, /* MTSETBSIZ */
MTSETDNSTY, /* MTSETDNSTY */
MTCMPRESS, /* MTCMPRESS */
MTEWARN /* MTEWARN */
};
switch (cmd) {
case MTIOCTOP: /* tape operation */
mtop = (struct mtop *)data;
count = mtop->mt_count;
code = 0;
if ((unsigned)mtop->mt_op < MTREW && mtop->mt_count <= 0)
return (EINVAL);
switch (mtop->mt_op) {
case MTWEOF:
if (sc->sc_blkno != -1) {
sc->sc_fileno += count;
sc->sc_blkno = 0;
}
break;
case MTBSF:
count = -count;
/* FALLTHROUGH */
case MTFSF:
code = 1;
if (sc->sc_blkno != -1) {
sc->sc_fileno += count;
sc->sc_blkno = 0;
}
break;
case MTBSR:
count = -count;
/* FALLTHROUGH */
case MTFSR:
if (sc->sc_blkno != -1)
sc->sc_blkno += count;
break;
case MTREW:
case MTNOP:
case MTCACHE:
case MTNOCACHE:
count = 0;
break;
case MTOFFL:
count = SCSI_LD_UNLOAD;
break;
case MTRETEN:
count = SCSI_LD_RETENSION;
break;
default:
return (EINVAL);
}
return (tzcommand(dev, tzops[mtop->mt_op], code, count, 0));
case MTIOCGET:
mtget = (struct mtget *)data;
mtget->mt_type = MT_ISAR; /* "GENERIC" SCSI */
mtget->mt_dsreg = 0;
if (sc->sc_flags & TZF_RDONLY)
mtget->mt_dsreg |= MT_DS_RDONLY;
if (sc->sc_flags & TZF_MOUNTED)
mtget->mt_dsreg |= MT_DS_MOUNTED;
mtget->mt_erreg = sc->sc_sense.status;
mtget->mt_resid = sc->sc_buf.b_resid;
mtget->mt_fileno = sc->sc_fileno;
mtget->mt_blkno = sc->sc_blkno;
/* clear latched errors */
sc->sc_sense.status = 0;
sc->sc_buf.b_resid = 0;
break;
case MTIOCIEOT:
case MTIOCEEOT:
break;
default:
return (EINVAL);
}
return (0);
}
void
tzstrategy(bp)
struct buf *bp;
{
int unit = tzunit(bp->b_dev);
struct tz_softc *sc = &tz_softc[unit];
int s;
if (sc->sc_flags & TZF_SEENEOF) {
bp->b_resid = bp->b_bcount;
biodone(bp);
return;
}
s = splbio();
BUFQ_INSERT_TAIL(&sc->sc_tab, bp);
if (sc->sc_active == 0) {
sc->sc_active = 1;
tzstart(unit);
}
splx(s);
}
/*
* Non-interrupt driven, non-dma dump routine.
*/
int
tzdump(dev, blkno, va, size)
dev_t dev;
daddr_t blkno;
caddr_t va;
size_t size;
{
/* Not implemented. */
return (ENXIO);
}
#endif
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