4.4BSD/usr/src/sys/luna68k/dev/sd.c
/*
* Copyright (c) 1992 OMRON Corporation.
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* OMRON Corporation.
*
* 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.
*
* @(#)sd.c 8.1 (Berkeley) 6/10/93
*/
/*
* sd.c -- SCSI Disk Device Driver
* remaked by A.Fujita, MAR-22-1992
*/
/*
* SCSI CCS (Command Command Set) disk driver.
*/
#include "sd.h"
#if NSD > 0
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/dkstat.h>
#include <sys/proc.h>
#include <sys/disklabel.h>
#include <luna68k/dev/device.h>
#include <luna68k/dev/scsireg.h>
#include <luna68k/dev/scsivar.h>
int sdinit(), sdstrategy(), sdstart(), sdintr();
struct driver sddriver = {
sdinit, "sd", sdstart, (int (*)()) 0, sdintr, (int (*)()) 0
};
struct disklabel sdlabel[NSD];
struct sd_softc {
struct hp_device *sc_hd;
struct scsi_queue sc_dq;
short sc_flags;
short sc_type; /* drive type */
short sc_punit; /* physical unit (scsi lun) */
u_int sc_blks; /* number of blocks on device */
int sc_blksize; /* device block size in bytes */
u_int sc_wpms; /* average xfer rate in 16 bit wds/sec. */
} sd_softc[NSD];
/* sc_flags values */
#define SDF_ALIVE 0x1
struct buf sdtab[NSD];
struct scsi_fmt_sense sdsense[NSD];
static struct scsi_fmt_cdb sd_read_cmd = { 10, CMD_READ_EXT };
static struct scsi_fmt_cdb sd_write_cmd = { 10, CMD_WRITE_EXT };
#define sdunit(x) ((minor(x) >> 3) & 0x7)
#define sdpart(x) (minor(x) & 0x7)
#define sdpunit(x) ((x) & 7)
#define sdminor(unit, part) (((unit) << 3) | (part))
#define b_lba b_resid
#define SDRETRY 3 /* IO retry count */
struct sd_iostat {
int imax;
int imin;
int omax;
int omin;
};
struct sd_iostat sd_iostat[NSD] = {
{ 14000, -1, 100, -1 },
};
/*
* Initialize
*/
int
sdinit(hd)
register struct hp_device *hd;
{
register struct sd_softc *sc = &sd_softc[hd->hp_unit];
register struct disklabel *lp;
char *msg, *sdreadlabel();
sc->sc_hd = hd;
sc->sc_punit = sdpunit(hd->hp_flags);
sc->sc_type = sdident(sc, hd);
if (sc->sc_type < 0)
return(0);
sc->sc_dq.dq_ctlr = hd->hp_ctlr;
sc->sc_dq.dq_unit = hd->hp_unit;
sc->sc_dq.dq_slave = hd->hp_slave;
sc->sc_dq.dq_driver = &sddriver;
/*
* Use the default sizes until we've read the label,
* or longer if there isn't one there.
*/
lp = &sdlabel[hd->hp_unit];
if (lp->d_secpercyl == 0) {
lp->d_secsize = DEV_BSIZE;
lp->d_nsectors = 32;
lp->d_ntracks = 20;
lp->d_secpercyl = 32*20;
lp->d_npartitions = 1;
lp->d_partitions[0].p_offset = 0;
lp->d_partitions[0].p_size = LABELSECTOR + 1;
}
/*
* read disklabel
*/
if (msg = sdreadlabel(makedev(4, (hd->hp_unit<<3)), sdstrategy, lp)) {
if (msg != NULL) {
printf("sd%d: %s\n", hd->hp_unit, msg);
return(0);
}
}
sc->sc_flags = SDF_ALIVE;
return(1);
}
static struct scsi_inquiry inqbuf;
static struct scsi_fmt_cdb inq = {
6,
CMD_INQUIRY, 0, 0, 0, sizeof(inqbuf), 0
};
static u_long capbuf[2];
struct scsi_fmt_cdb cap = {
10,
CMD_READ_CAPACITY, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
int
sdident(sc, hd)
struct sd_softc *sc;
struct hp_device *hd;
{
char idstr[32];
int unit;
register int ctlr, slave;
register int i;
register int tries = 10;
ctlr = hd->hp_ctlr;
slave = hd->hp_slave;
unit = sc->sc_punit;
/*
* See if unit exists and is a disk then read block size & nblocks.
*/
while ((i = scsi_test_unit_rdy(ctlr, slave, unit)) != 0) {
if (i < 0 || --tries < 0)
return (-1);
if (i == STS_CHECKCOND) {
u_char sensebuf[8];
struct scsi_xsense *sp = (struct scsi_xsense *)sensebuf;
scsi_request_sense(ctlr, slave, unit, sensebuf, 8);
if (sp->class == 7 && sp->key == 6)
/* drive doing an RTZ -- give it a while */
DELAY(1000000);
}
DELAY(1000);
}
if (scsi_immed_command(ctlr, slave, unit, &inq, (u_char *)&inqbuf,
sizeof(inqbuf)) ||
scsi_immed_command(ctlr, slave, unit, &cap, (u_char *)&capbuf,
sizeof(capbuf)))
/* doesn't exist or not a CCS device */
return (-1);
switch (inqbuf.type) {
case 0: /* disk */
case 4: /* WORM */
case 5: /* CD-ROM */
case 7: /* Magneto-optical */
break;
default: /* not a disk */
return (-1);
}
sc->sc_blks = capbuf[0];
sc->sc_blksize = capbuf[1];
bcopy((caddr_t)&inqbuf.vendor_id, (caddr_t)idstr, 28);
for (i = 27; i > 23; --i)
if (idstr[i] != ' ')
break;
idstr[i+1] = 0;
for (i = 23; i > 7; --i)
if (idstr[i] != ' ')
break;
idstr[i+1] = 0;
for (i = 7; i >= 0; --i)
if (idstr[i] != ' ')
break;
idstr[i+1] = 0;
printf("sd%d: %s %s rev %s", hd->hp_unit, idstr, &idstr[8],
&idstr[24]);
printf(", %d %d byte blocks\n", sc->sc_blks, sc->sc_blksize);
if (sc->sc_blksize != DEV_BSIZE) {
printf("sd%d: need %d byte blocks - drive ignored\n", unit, DEV_BSIZE);
return(1);
}
sc->sc_wpms = 32 * (60 * DEV_BSIZE / 2); /* XXX */
return(inqbuf.type);
}
/*
* Open
*/
int
sdopen(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
register int unit = sdunit(dev);
register struct sd_softc *sc = &sd_softc[unit];
if (unit >= NSD)
return(ENXIO);
if ((sc->sc_flags & SDF_ALIVE) == 0 && suser(p->p_ucred, &p->p_acflag))
return(ENXIO);
if (sc->sc_hd->hp_dk >= 0)
dk_wpms[sc->sc_hd->hp_dk] = sc->sc_wpms;
return(0);
}
/*
* Close
*/
int
sdclose(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
}
/*
* Strategy
*/
int
sdstrategy(bp)
register struct buf *bp;
{
register int unit = sdunit(bp->b_dev);
register int part = sdpart(bp->b_dev);
register struct sd_softc *sc = &sd_softc[unit];
register struct disklabel *lp = &sdlabel[unit];
register struct partition *pp = &(lp->d_partitions[part]);
register struct buf *dp = &sdtab[unit];
register daddr_t bn;
register int sz, s;
bn = bp->b_blkno;
sz = howmany(bp->b_bcount, DEV_BSIZE);
/* check that tracsfer is within a drive's partition */
if (bn < 0 || (bn + sz) > pp->p_size) {
sz = pp->p_size - bn;
if (sz == 0) {
bp->b_resid = bp->b_bcount;
goto done;
}
if (sz < 0) {
bp->b_error = EINVAL;
bp->b_flags |= B_ERROR;
goto done;
}
bp->b_bcount = dbtob(sz);
}
/* calculate LBA for transfer */
bp->b_lba = bn + pp->p_offset;
/* raise priority to block sdintr */
s = splbio();
/* call disksort to sort request into drive queue */
disksort(dp, bp);
if (dp->b_active == 0) { /* */
dp->b_active = 1;
sdustart(unit);
}
/* lower priority */
splx(s);
return;
done:
biodone(bp);
}
int
sdustart(unit)
register int unit;
{
register struct sd_softc *sc = &sd_softc[unit];
register struct hp_device *hp = sc->sc_hd;
register struct scsi_queue *dq = &sc->sc_dq;
register struct buf *bp = sdtab[unit].b_actf;
register struct scsi_fmt_cdb *cmd;
cmd = bp->b_flags & B_READ? &sd_read_cmd : &sd_write_cmd;
*(int *)(&cmd->cdb[2]) = bp->b_lba;
*(u_short *)(&cmd->cdb[7]) = howmany(bp->b_bcount, DEV_BSIZE);
dq->dq_cdb = cmd;
dq->dq_bp = bp;
dq->dq_flags = DQ_DISCONNECT; /* SCSI Disconnect */
if (screq(dq))
sdstart(unit);
}
int
sdstart(unit)
register int unit;
{
register struct sd_softc *sc = &sd_softc[unit];
register struct hp_device *hp = sc->sc_hd;
if (hp->hp_dk >= 0) {
dk_busy |= 1 << hp->hp_dk;
}
scstart(hp->hp_ctlr);
}
/*
* Return:
* 0 if not really an error
* <0 if we should do a retry
* >0 if a fatal error
*/
static int
sderror(unit, sc, hp, stat)
int unit, stat;
register struct sd_softc *sc;
register struct hp_device *hp;
{
int cond = 1;
sdsense[unit].status = stat;
if (stat & STS_CHECKCOND) {
struct scsi_xsense *sp;
scsi_request_sense(hp->hp_ctlr, hp->hp_slave,
sc->sc_punit, sdsense[unit].sense,
sizeof(sdsense[unit].sense));
sp = (struct scsi_xsense *)sdsense[unit].sense;
printf("sd%d: scsi sense class %d, code %d", unit,
sp->class, sp->code);
if (sp->class == 7) {
printf(", key %d", sp->key);
if (sp->valid)
printf(", blk %d", *(int *)&sp->info1);
switch (sp->key) {
/* no sense, try again */
case 0:
cond = -1;
break;
/* recovered error, not a problem */
case 1:
cond = 0;
break;
}
}
printf("\n");
}
return(cond);
}
/*
* Interrupt
*/
int
sdintr(unit, stat)
register int unit;
int stat;
{
register struct sd_softc *sc = &sd_softc[unit];
register struct hp_device *hp = sc->sc_hd;
register struct scsi_queue *dq = &sc->sc_dq;
register struct buf *bp = dq->dq_bp;
int cond;
if (stat == SC_IO_TIMEOUT) {
printf("sdintr: sd%d timeout error\n", unit, stat);
}
if (hp->hp_dk >= 0) {
dk_busy &=~ (1 << hp->hp_dk);
if (stat == 0) {
++dk_seek[hp->hp_dk];
++dk_xfer[hp->hp_dk];
dk_wds[hp->hp_dk] += bp->b_bcount >> 6;
}
}
if (bp->b_flags & B_READ) {
sd_iostat[unit].imin = min(dq->dq_imin, sd_iostat[unit].imin);
if (dq->dq_imax > sd_iostat[unit].imax) {
sd_iostat[unit].imax = dq->dq_imax;
#ifdef SD_IOSTAT
printf("sdintr: sd%d INPUT MAX = %d, MIN = %d\n",
unit, sd_iostat[unit].imax, sd_iostat[unit].imin);
#endif
}
} else {
sd_iostat[unit].omin = min(dq->dq_omin, sd_iostat[unit].omin);
if (dq->dq_omax > sd_iostat[unit].omax) {
sd_iostat[unit].omax = dq->dq_omax;
#ifdef SD_IOSTAT
printf("sdintr: sd%d OUTPUT MAX = %d, MIN = %d\n",
unit, sd_iostat[unit].omax, sd_iostat[unit].omin);
#endif
}
}
if (stat != 0) {
if (stat > 0) {
#ifdef DEBUGPRINT
dbgprintall();
printf("\n");
#endif
cond = sderror(unit, sc, hp, stat);
if (cond) {
if (cond < 0 && sdtab[unit].b_errcnt++ < SDRETRY) {
sdstart(unit);
return;
}
}
} else {
if (sdtab[unit].b_errcnt++ < SDRETRY) {
printf("sdintr: sd%d restart IO request\n", unit);
sdstart(unit);
return;
}
}
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
}
sdtab[unit].b_errcnt = 0;
sdtab[unit].b_actf = bp->b_actf;
bp->b_resid = 0;
biodone(bp);
scfree(dq);
if (sdtab[unit].b_actf) {
sdustart(unit);
} else {
sdtab[unit].b_active = 0;
}
}
/*
* RAW Device Routines
*/
int
sdread(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
register int unit = sdunit(dev);
return (physio(sdstrategy, NULL, dev, B_READ, minphys, uio));
}
int
sdwrite(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
register int unit = sdunit(dev);
return (physio(sdstrategy, NULL, dev, B_WRITE, minphys, uio));
}
int
sdioctl(dev, cmd, data, flag, p)
dev_t dev;
int cmd;
caddr_t data;
int flag;
struct proc *p;
{
int unit = sdunit(dev);
register struct sd_softc *sc = &sd_softc[unit];
register struct disklabel *lp = &sdlabel[unit];
int error = 0;
switch (cmd) {
case DIOCGDINFO:
*(struct disklabel *)data = *lp;
break;
case DIOCGPART:
((struct partinfo *)data)->disklab = lp;
((struct partinfo *)data)->part =
&lp->d_partitions[sdpart(dev)];
break;
case DIOCWLABEL:
case DIOCSDINFO:
case DIOCWDINFO:
break;
default:
error = ENOTTY;
break;
}
return (error);
}
/*
* Size
*/
int
sdsize(dev)
dev_t dev;
{
register int unit = sdunit(dev);
register struct sd_softc *sc = &sd_softc[unit];
if (unit >= NSD || (sc->sc_flags & SDF_ALIVE) == 0)
return(-1);
return(sdlabel[unit].d_partitions[sdpart(dev)].p_size);
}
/*
* Dump
*/
int
sddump(dev)
dev_t dev;
{
}
/*
* Disk Subs
*/
/*
* Attempt to read a disk label from a device
* using the indicated stategy routine.
* The label must be partly set up before this:
* secpercyl and anything required in the strategy routine
* (e.g., sector size) must be filled in before calling us.
* Returns null on success and an error string on failure.
*/
char *
sdreadlabel(dev, strat, lp)
dev_t dev;
int (*strat)();
register struct disklabel *lp;
{
register struct buf *bp;
struct disklabel *dlp;
char *msg = NULL;
if (lp->d_secperunit == 0)
lp->d_secperunit = 0x1fffffff;
lp->d_npartitions = 1;
if (lp->d_partitions[0].p_size == 0)
lp->d_partitions[0].p_size = 0x1fffffff;
lp->d_partitions[0].p_offset = 0;
bp = geteblk((int)lp->d_secsize);
bp->b_dev = dev;
bp->b_blkno = LABELSECTOR;
bp->b_bcount = lp->d_secsize;
bp->b_flags = B_BUSY | B_READ;
(*strat)(bp);
if (biowait(bp)) {
msg = "I/O error";
} else {
for (dlp = (struct disklabel *)bp->b_un.b_addr;
dlp <= (struct disklabel *)(bp->b_un.b_addr+DEV_BSIZE-sizeof(*dlp));
dlp = (struct disklabel *)((char *)dlp + sizeof(long))) {
if (dlp->d_magic != DISKMAGIC || dlp->d_magic2 != DISKMAGIC) {
if (msg == NULL)
msg = "no disk label";
} else if (dlp->d_npartitions > MAXPARTITIONS ||
dkcksum(dlp) != 0)
msg = "disk label corrupted";
else {
*lp = *dlp;
msg = NULL;
break;
}
}
}
bp->b_flags = B_INVAL | B_AGE;
brelse(bp);
return (msg);
}
#ifdef notyet
/*
* Checksum routine for OMRON native disklabel
*/
#define OMRON_LBLSIZE 512
u_short
omcksum(omp)
register char *omp;
{
register u_short *start, *end;
register u_short sum = 0;
start = (u_short *) omp;
end = (u_short *) &start[(OMRON_LBLSIZE/sizeof(u_short) - 1)];
while (start < end)
sum ^= *start++;
printf("omcksum: saved ... 0x%s\n", hexstr(*end, 4));
printf("omcksum: calced ... 0x%s\n", hexstr(sum, 4));
return (sum);
}
/*
* Write disk label back to device after modification.
*/
sdwritelabel(dev, strat, lp)
dev_t dev;
int (*strat)();
register struct disklabel *lp;
{
struct buf *bp;
struct disklabel *dlp;
int labelpart;
int error = 0;
labelpart = sdpart(dev);
if (lp->d_partitions[labelpart].p_offset != 0) {
if (lp->d_partitions[0].p_offset != 0)
return (EXDEV); /* not quite right */
labelpart = 0;
}
bp = geteblk((int)lp->d_secsize);
bp->b_dev = makedev(major(dev), sdminor(sdunit(dev), labelpart));
bp->b_blkno = LABELSECTOR;
bp->b_bcount = lp->d_secsize;
bp->b_flags = B_READ;
(*strat)(bp);
if (error = biowait(bp))
goto done;
for (dlp = (struct disklabel *)bp->b_un.b_addr;
dlp <= (struct disklabel *)
(bp->b_un.b_addr + lp->d_secsize - sizeof(*dlp));
dlp = (struct disklabel *)((char *)dlp + sizeof(long))) {
if (dlp->d_magic == DISKMAGIC && dlp->d_magic2 == DISKMAGIC &&
dkcksum(dlp) == 0) {
omcksum(bp->b_un.b_addr);
/*
*dlp = *lp;
bp->b_flags = B_WRITE;
(*strat)(bp);
error = biowait(bp);
goto done;
*/
}
}
error = ESRCH;
done:
brelse(bp);
return (error);
}
#endif
#endif