projects / unix-history / blob
? search:
summary | tags | clone url | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
BSD 4_4_Lite2 release
[unix-history] / usr / src / sys / hp300 / dev / sd.c
/*
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Van Jacobson of Lawrence Berkeley Laboratory.
*
* 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 8.9 (Berkeley) 5/14/95
*/
/*
* SCSI CCS (Command Command Set) disk driver.
*/
#include "sd.h"
#if NSD > 0
#ifndef lint
static char rcsid[] = "$Header: /sys.lite/hp300/dev/RCS/sd.c,v 1.2 1994/01/10 18:29:19 mike Exp mike $";
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/stat.h>
#include <sys/dkstat.h>
#include <sys/disklabel.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/ioctl.h>
#include <sys/fcntl.h>
#include <hp/dev/device.h>
#include <hp300/dev/scsireg.h>
#include <hp300/dev/sdvar.h>
#ifdef USELEDS
#include <hp300/hp300/led.h>
#endif
#include <vm/vm.h>
extern int scsi_test_unit_rdy();
extern int scsi_request_sense();
extern int scsi_inquiry();
extern int scsi_read_capacity();
extern int scsi_tt_write();
extern int scsireq();
extern int scsiustart();
extern int scsigo();
extern void scsifree();
extern void scsireset();
extern void scsi_delay();
extern void disksort();
extern void biodone();
extern int physio();
extern void TBIS();
int sdinit();
void sdstrategy(), sdstart(), sdustart(), sdgo(), sdintr();
struct driver sddriver = {
sdinit, "sd", (int (*)())sdstart, (int (*)())sdgo, (int (*)())sdintr,
};
#ifdef DEBUG
int sddebug = 1;
#define SDB_ERROR 0x01
#define SDB_PARTIAL 0x02
#define SDB_CAPACITY 0x04
#endif
struct sd_softc sd_softc[NSD];
struct sdstats sdstats[NSD];
struct buf sdtab[NSD];
struct scsi_fmt_cdb sdcmd[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 };
/*
* Table of scsi commands users are allowed to access via "format"
* mode. 0 means not legal. 1 means "immediate" (doesn't need dma).
* -1 means needs dma and/or wait for intr.
*/
static char legal_cmds[256] = {
/***** 0 1 2 3 4 5 6 7 8 9 A B C D E F */
/*00*/ 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*10*/ 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0,
/*20*/ 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*30*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*40*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*50*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*60*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*70*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*80*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*90*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*a0*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*b0*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*c0*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*d0*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*e0*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*f0*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
};
static struct scsi_inquiry inqbuf;
static struct scsi_fmt_cdb inq = {
6,
CMD_INQUIRY, 0, 0, 0, sizeof(inqbuf), 0
};
static int
sdident(sc, hd)
struct sd_softc *sc;
struct hp_device *hd;
{
int unit;
register int ctlr, slave;
register int i;
register int tries = 10;
char idstr[32];
int isrm = 0;
ctlr = hd->hp_ctlr;
slave = hd->hp_slave;
unit = sc->sc_punit;
scsi_delay(-1);
/*
* 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 == -1 || --tries < 0) {
if (isrm)
break;
/* doesn't exist or not a CCS device */
goto failed;
}
if (i == STS_CHECKCOND) {
u_char sensebuf[128];
struct scsi_xsense *sp = (struct scsi_xsense *)sensebuf;
scsi_request_sense(ctlr, slave, unit, sensebuf,
sizeof(sensebuf));
if (sp->class == 7)
switch (sp->key) {
/*
* Not ready -- might be removable media
* device with no media. Assume as much,
* if it really isn't, the inquiry commmand
* below will fail.
*/
case 2:
isrm = 1;
break;
/* drive doing an RTZ -- give it a while */
case 6:
DELAY(1000000);
break;
default:
break;
}
}
DELAY(1000);
}
/*
* Find out about device
*/
if (scsi_immed_command(ctlr, slave, unit, &inq,
(u_char *)&inqbuf, sizeof(inqbuf), B_READ))
goto failed;
switch (inqbuf.type) {
case 0: /* disk */
case 4: /* WORM */
case 5: /* CD-ROM */
case 7: /* Magneto-optical */
break;
default: /* not a disk */
goto failed;
}
/*
* Get a usable id string
*/
switch (inqbuf.version) {
case 1:
case 2:
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;
break;
default:
bcopy("UNKNOWN", &idstr[0], 8);
bcopy("DRIVE TYPE", &idstr[8], 11);
}
if (inqbuf.qual & 0x80)
sc->sc_flags |= SDF_RMEDIA;
if (sdgetcapacity(sc, hd, NODEV) < 0)
goto failed;
switch (inqbuf.version) {
case 1:
case 2:
printf("sd%d: %s %s rev %s", hd->hp_unit, idstr, &idstr[8],
&idstr[24]);
if (inqbuf.version == 2)
printf(" (SCSI-2)");
break;
default:
printf("sd%d: type 0x%x, qual 0x%x, ver %d", hd->hp_unit,
inqbuf.type, inqbuf.qual, inqbuf.version);
break;
}
if (sc->sc_blks)
printf(", %d %d byte blocks",
sc->sc_blks >> sc->sc_bshift, sc->sc_blksize);
printf("\n");
sc->sc_wpms = 32 * (60 * DEV_BSIZE / 2); /* XXX */
scsi_delay(0);
return(inqbuf.type);
failed:
scsi_delay(0);
return(-1);
}
int
sdinit(hd)
register struct hp_device *hd;
{
register struct sd_softc *sc = &sd_softc[hd->hp_unit];
sc->sc_hd = hd;
sc->sc_flags = 0;
/*
* XXX formerly 0 meant unused but now pid 0 can legitimately
* use this interface (sdgetcapacity).
*/
sc->sc_format_pid = -1;
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;
sc->sc_flags |= SDF_ALIVE;
return(1);
}
void
sdreset(sc, hd)
register struct sd_softc *sc;
register struct hp_device *hd;
{
sdstats[hd->hp_unit].sdresets++;
}
/*
* Determine capacity of a drive.
* Returns -1 on a failure, 0 on success, 1 on a failure that is probably
* due to missing media.
*/
int
sdgetcapacity(sc, hd, dev)
struct sd_softc *sc;
struct hp_device *hd;
dev_t dev;
{
static struct scsi_fmt_cdb cap = {
10,
CMD_READ_CAPACITY, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
u_char *capbuf;
int i, capbufsize;
/*
* Cannot use stack space for this buffer since stack KVA may not
* be valid (i.e. in context of this process) when the operation
* actually starts.
*/
capbufsize = 8;
capbuf = malloc(capbufsize, M_DEVBUF, M_WAITOK);
if (dev == NODEV) {
i = scsi_immed_command(hd->hp_ctlr, hd->hp_slave, sc->sc_punit,
&cap, capbuf, capbufsize, B_READ);
} else {
struct buf *bp;
/*
* XXX this is horrible
*/
if (sc->sc_format_pid >= 0)
panic("sdgetcapacity");
bp = malloc(sizeof *bp, M_DEVBUF, M_WAITOK);
sc->sc_format_pid = curproc->p_pid;
bcopy((caddr_t)&cap, (caddr_t)&sdcmd[hd->hp_unit], sizeof cap);
bp->b_dev = dev;
bp->b_flags = B_READ | B_BUSY;
bp->b_un.b_addr = (caddr_t)capbuf;
bp->b_bcount = capbufsize;
sdstrategy(bp);
i = biowait(bp) ? sdsense[hd->hp_unit].status : 0;
free(bp, M_DEVBUF);
sc->sc_format_pid = -1;
}
if (i) {
if (i != STS_CHECKCOND || (sc->sc_flags & SDF_RMEDIA) == 0) {
#ifdef DEBUG
if (sddebug & SDB_CAPACITY)
printf("sd%d: read_capacity returns %d\n",
hd->hp_unit, i);
#endif
free(capbuf, M_DEVBUF);
return (-1);
}
/*
* XXX assume unformatted or non-existant media
*/
sc->sc_blks = 0;
sc->sc_blksize = DEV_BSIZE;
sc->sc_bshift = 0;
#ifdef DEBUG
if (sddebug & SDB_CAPACITY)
printf("sd%d: removable media not present\n",
hd->hp_unit);
#endif
free(capbuf, M_DEVBUF);
return (1);
}
sc->sc_blks = *(u_int *)&capbuf[0];
sc->sc_blksize = *(int *)&capbuf[4];
free(capbuf, M_DEVBUF);
sc->sc_bshift = 0;
/* return value of read capacity is last valid block number */
sc->sc_blks++;
if (sc->sc_blksize != DEV_BSIZE) {
if (sc->sc_blksize < DEV_BSIZE) {
printf("sd%d: need at least %d byte blocks - %s\n",
hd->hp_unit, DEV_BSIZE, "drive ignored");
return (-1);
}
for (i = sc->sc_blksize; i > DEV_BSIZE; i >>= 1)
++sc->sc_bshift;
sc->sc_blks <<= sc->sc_bshift;
}
#ifdef DEBUG
if (sddebug & SDB_CAPACITY)
printf("sd%d: blks=%d, blksize=%d, bshift=%d\n", hd->hp_unit,
sc->sc_blks, sc->sc_blksize, sc->sc_bshift);
#endif
return (0);
}
/*
* Read or constuct a disklabel
*/
int
sdgetinfo(dev)
dev_t dev;
{
int unit = sdunit(dev);
register struct sd_softc *sc = &sd_softc[unit];
register struct disklabel *lp = &sc->sc_info.si_label;
register struct partition *pi;
char *msg, *readdisklabel();
#ifdef COMPAT_NOLABEL
int usedefault = 1;
/*
* For CD-ROM just define a single partition
*/
if (sc->sc_type == 5)
usedefault = 0;
#endif
bzero((caddr_t)lp, sizeof *lp);
msg = NULL;
/*
* If removable media or the size unavailable at boot time
* (i.e. unformatted hard disk), attempt to set the capacity
* now.
*/
if ((sc->sc_flags & SDF_RMEDIA) || sc->sc_blks == 0) {
switch (sdgetcapacity(sc, sc->sc_hd, dev)) {
case 0:
break;
case -1:
/*
* Hard error, just return (open will fail).
*/
return (EIO);
case 1:
/*
* XXX return 0 so open can continue just in case
* the media is unformatted and we want to format it.
* We set the error flag so they cannot do much else.
*/
sc->sc_flags |= SDF_ERROR;
msg = "unformatted/missing media";
#ifdef COMPAT_NOLABEL
usedefault = 0;
#endif
break;
}
}
/*
* Set some default values to use while reading the label
* (or to use if there isn't a label) and try reading it.
*/
if (msg == NULL) {
lp->d_type = DTYPE_SCSI;
lp->d_secsize = DEV_BSIZE;
lp->d_nsectors = 32;
lp->d_ntracks = 20;
lp->d_ncylinders = 1;
lp->d_secpercyl = 32*20;
lp->d_npartitions = 3;
lp->d_partitions[2].p_offset = 0;
/* XXX we can open a device even without SDF_ALIVE */
if (sc->sc_blksize == 0)
sc->sc_blksize = DEV_BSIZE;
/* XXX ensure size is at least one device block */
lp->d_partitions[2].p_size =
roundup(LABELSECTOR+1, btodb(sc->sc_blksize));
msg = readdisklabel(sdlabdev(dev), sdstrategy, lp);
if (msg == NULL)
return (0);
}
pi = lp->d_partitions;
printf("sd%d: WARNING: %s, ", unit, msg);
#ifdef COMPAT_NOLABEL
if (usedefault) {
printf("using old default partitioning\n");
sdmakedisklabel(unit, lp);
return(0);
}
#endif
printf("defining `c' partition as entire disk\n");
pi[2].p_size = sc->sc_blks;
/* XXX reset other info since readdisklabel screws with it */
lp->d_npartitions = 3;
pi[0].p_size = 0;
return(0);
}
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];
int error, mask;
if (unit >= NSD || (sc->sc_flags & SDF_ALIVE) == 0)
return(ENXIO);
/*
* Wait for any pending opens/closes to complete
*/
while (sc->sc_flags & (SDF_OPENING|SDF_CLOSING))
sleep((caddr_t)sc, PRIBIO);
/*
* On first open, get label and partition info.
* We may block reading the label, so be careful
* to stop any other opens.
*/
if (sc->sc_info.si_open == 0) {
sc->sc_flags |= SDF_OPENING;
error = sdgetinfo(dev);
sc->sc_flags &= ~SDF_OPENING;
wakeup((caddr_t)sc);
if (error)
return(error);
}
if (sc->sc_hd->hp_dk >= 0)
dk_wpms[sc->sc_hd->hp_dk] = sc->sc_wpms;
mask = 1 << sdpart(dev);
if (mode == S_IFCHR)
sc->sc_info.si_copen |= mask;
else
sc->sc_info.si_bopen |= mask;
sc->sc_info.si_open |= mask;
return(0);
}
int
sdclose(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
int unit = sdunit(dev);
register struct sd_softc *sc = &sd_softc[unit];
register struct sdinfo *si = &sc->sc_info;
int mask, s;
mask = 1 << sdpart(dev);
if (mode == S_IFCHR)
si->si_copen &= ~mask;
else
si->si_bopen &= ~mask;
si->si_open = si->si_bopen | si->si_copen;
/*
* On last close, we wait for all activity to cease since
* the label/parition info will become invalid. Since we
* might sleep, we must block any opens while we are here.
* Note we don't have to about other closes since we know
* we are the last one.
*/
if (si->si_open == 0) {
sc->sc_flags |= SDF_CLOSING;
s = splbio();
while (sdtab[unit].b_active) {
sc->sc_flags |= SDF_WANTED;
sleep((caddr_t)&sdtab[unit], PRIBIO);
}
splx(s);
sc->sc_flags &= ~(SDF_CLOSING|SDF_WLABEL|SDF_ERROR);
wakeup((caddr_t)sc);
}
sc->sc_format_pid = -1;
return(0);
}
/*
* This routine is called for partial block transfers and non-aligned
* transfers (the latter only being possible on devices with a block size
* larger than DEV_BSIZE). The operation is performed in three steps
* using a locally allocated buffer:
* 1. transfer any initial partial block
* 2. transfer full blocks
* 3. transfer any final partial block
*/
static void
sdlblkstrat(bp, bsize)
register struct buf *bp;
register int bsize;
{
register struct buf *cbp = (struct buf *)malloc(sizeof(struct buf),
M_DEVBUF, M_WAITOK);
caddr_t cbuf = (caddr_t)malloc(bsize, M_DEVBUF, M_WAITOK);
register int bn, resid;
register caddr_t addr;
bzero((caddr_t)cbp, sizeof(*cbp));
cbp->b_proc = curproc; /* XXX */
cbp->b_dev = bp->b_dev;
bn = bp->b_blkno;
resid = bp->b_bcount;
addr = bp->b_un.b_addr;
#ifdef DEBUG
if (sddebug & SDB_PARTIAL)
printf("sdlblkstrat: bp %x flags %x bn %x resid %x addr %x\n",
bp, bp->b_flags, bn, resid, addr);
#endif
while (resid > 0) {
register int boff = dbtob(bn) & (bsize - 1);
register int count;
if (boff || resid < bsize) {
sdstats[sdunit(bp->b_dev)].sdpartials++;
count = min(resid, bsize - boff);
cbp->b_flags = B_BUSY | B_PHYS | B_READ;
cbp->b_blkno = bn - btodb(boff);
cbp->b_un.b_addr = cbuf;
cbp->b_bcount = bsize;
#ifdef DEBUG
if (sddebug & SDB_PARTIAL)
printf(" readahead: bn %x cnt %x off %x addr %x\n",
cbp->b_blkno, count, boff, addr);
#endif
sdstrategy(cbp);
biowait(cbp);
if (cbp->b_flags & B_ERROR) {
bp->b_flags |= B_ERROR;
bp->b_error = cbp->b_error;
break;
}
if (bp->b_flags & B_READ) {
bcopy(&cbuf[boff], addr, count);
goto done;
}
bcopy(addr, &cbuf[boff], count);
#ifdef DEBUG
if (sddebug & SDB_PARTIAL)
printf(" writeback: bn %x cnt %x off %x addr %x\n",
cbp->b_blkno, count, boff, addr);
#endif
} else {
count = resid & ~(bsize - 1);
cbp->b_blkno = bn;
cbp->b_un.b_addr = addr;
cbp->b_bcount = count;
#ifdef DEBUG
if (sddebug & SDB_PARTIAL)
printf(" fulltrans: bn %x cnt %x addr %x\n",
cbp->b_blkno, count, addr);
#endif
}
cbp->b_flags = B_BUSY | B_PHYS | (bp->b_flags & B_READ);
sdstrategy(cbp);
biowait(cbp);
if (cbp->b_flags & B_ERROR) {
bp->b_flags |= B_ERROR;
bp->b_error = cbp->b_error;
break;
}
done:
bn += btodb(count);
resid -= count;
addr += count;
#ifdef DEBUG
if (sddebug & SDB_PARTIAL)
printf(" done: bn %x resid %x addr %x\n",
bn, resid, addr);
#endif
}
free(cbuf, M_DEVBUF);
free(cbp, M_DEVBUF);
}
void
sdstrategy(bp)
register struct buf *bp;
{
int unit = sdunit(bp->b_dev);
register struct sd_softc *sc = &sd_softc[unit];
register struct buf *dp = &sdtab[unit];
register struct partition *pinfo;
register daddr_t bn;
register int sz, s;
if (sc->sc_format_pid >= 0) {
if (sc->sc_format_pid != curproc->p_pid) { /* XXX */
bp->b_error = EPERM;
goto bad;
}
bp->b_cylin = 0;
} else {
if (sc->sc_flags & SDF_ERROR) {
bp->b_error = EIO;
goto bad;
}
bn = bp->b_blkno;
sz = howmany(bp->b_bcount, DEV_BSIZE);
pinfo = &sc->sc_info.si_label.d_partitions[sdpart(bp->b_dev)];
if (bn < 0 || bn + sz > pinfo->p_size) {
sz = pinfo->p_size - bn;
if (sz == 0) {
bp->b_resid = bp->b_bcount;
goto done;
}
if (sz < 0) {
bp->b_error = EINVAL;
goto bad;
}
bp->b_bcount = dbtob(sz);
}
/*
* Check for write to write protected label
*/
if (bn + pinfo->p_offset <= LABELSECTOR &&
#if LABELSECTOR != 0
bn + pinfo->p_offset + sz > LABELSECTOR &&
#endif
!(bp->b_flags & B_READ) && !(sc->sc_flags & SDF_WLABEL)) {
bp->b_error = EROFS;
goto bad;
}
/*
* Non-aligned or partial-block transfers handled specially.
*/
s = sc->sc_blksize - 1;
if ((dbtob(bn) & s) || (bp->b_bcount & s)) {
sdlblkstrat(bp, sc->sc_blksize);
goto done;
}
bp->b_cylin = (bn + pinfo->p_offset) >> sc->sc_bshift;
}
s = splbio();
disksort(dp, bp);
if (dp->b_active == 0) {
dp->b_active = 1;
sdustart(unit);
}
splx(s);
return;
bad:
bp->b_flags |= B_ERROR;
done:
biodone(bp);
}
void
sdustart(unit)
register int unit;
{
if (scsireq(&sd_softc[unit].sc_dq))
sdstart(unit);
}
/*
* 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;
/* possible media change */
case 6:
/*
* For removable media, if we are doing the
* first open (i.e. reading the label) go
* ahead and retry, otherwise someone has
* changed the media out from under us and
* we should abort any further operations
* until a close is done.
*/
if (sc->sc_flags & SDF_RMEDIA) {
if (sc->sc_flags & SDF_OPENING)
cond = -1;
else
sc->sc_flags |= SDF_ERROR;
}
break;
}
}
printf("\n");
}
return(cond);
}
static void
sdfinish(unit, sc, bp)
int unit;
register struct sd_softc *sc;
register struct buf *bp;
{
register struct buf *dp = &sdtab[unit];
dp->b_errcnt = 0;
dp->b_actf = bp->b_actf;
bp->b_resid = 0;
biodone(bp);
scsifree(&sc->sc_dq);
if (dp->b_actf)
sdustart(unit);
else {
dp->b_active = 0;
if (sc->sc_flags & SDF_WANTED) {
sc->sc_flags &= ~SDF_WANTED;
wakeup((caddr_t)dp);
}
}
}
void
sdstart(unit)
register int unit;
{
register struct sd_softc *sc = &sd_softc[unit];
register struct hp_device *hp = sc->sc_hd;
/*
* we have the SCSI bus -- in format mode, we may or may not need dma
* so check now.
*/
if (sc->sc_format_pid >= 0 && legal_cmds[sdcmd[unit].cdb[0]] > 0) {
register struct buf *bp = sdtab[unit].b_actf;
register int sts;
sdtab[unit].b_errcnt = 0;
while (1) {
sts = scsi_immed_command(hp->hp_ctlr, hp->hp_slave,
sc->sc_punit, &sdcmd[unit],
bp->b_un.b_addr, bp->b_bcount,
bp->b_flags & B_READ);
sdsense[unit].status = sts;
if ((sts & 0xfe) == 0 ||
(sts = sderror(unit, sc, hp, sts)) == 0)
break;
if (sts > 0 || sdtab[unit].b_errcnt++ >= SDRETRY) {
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
break;
}
}
sdfinish(unit, sc, bp);
} else if (scsiustart(hp->hp_ctlr))
sdgo(unit);
}
void
sdgo(unit)
register int unit;
{
register struct sd_softc *sc = &sd_softc[unit];
register struct hp_device *hp = sc->sc_hd;
register struct buf *bp = sdtab[unit].b_actf;
register int pad;
register struct scsi_fmt_cdb *cmd;
if (sc->sc_format_pid >= 0) {
cmd = &sdcmd[unit];
pad = 0;
} else {
/*
* Drive is in an error state, abort all operations
*/
if (sc->sc_flags & SDF_ERROR) {
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
sdfinish(unit, sc, bp);
return;
}
cmd = bp->b_flags & B_READ? &sd_read_cmd : &sd_write_cmd;
*(int *)(&cmd->cdb[2]) = bp->b_cylin;
pad = howmany(bp->b_bcount, sc->sc_blksize);
*(u_short *)(&cmd->cdb[7]) = pad;
pad = (bp->b_bcount & (sc->sc_blksize - 1)) != 0;
#ifdef DEBUG
if (pad)
printf("sd%d: partial block xfer -- %x bytes\n",
unit, bp->b_bcount);
#endif
sdstats[unit].sdtransfers++;
}
#ifdef USELEDS
if (inledcontrol == 0)
ledcontrol(0, 0, LED_DISK);
#endif
if (scsigo(hp->hp_ctlr, hp->hp_slave, sc->sc_punit, bp, cmd, pad) == 0) {
if (hp->hp_dk >= 0) {
dk_busy |= 1 << hp->hp_dk;
++dk_seek[hp->hp_dk];
++dk_xfer[hp->hp_dk];
dk_wds[hp->hp_dk] += bp->b_bcount >> 6;
}
return;
}
#ifdef DEBUG
if (sddebug & SDB_ERROR)
printf("sd%d: sdstart: %s adr %d blk %d len %d ecnt %d\n",
unit, bp->b_flags & B_READ? "read" : "write",
bp->b_un.b_addr, bp->b_cylin, bp->b_bcount,
sdtab[unit].b_errcnt);
#endif
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
sdfinish(unit, sc, bp);
}
void
sdintr(unit, stat)
register int unit;
int stat;
{
register struct sd_softc *sc = &sd_softc[unit];
register struct buf *bp = sdtab[unit].b_actf;
register struct hp_device *hp = sc->sc_hd;
int cond;
if (bp == NULL) {
printf("sd%d: bp == NULL\n", unit);
return;
}
if (hp->hp_dk >= 0)
dk_busy &=~ (1 << hp->hp_dk);
if (stat) {
#ifdef DEBUG
if (sddebug & SDB_ERROR)
printf("sd%d: sdintr: bad scsi status 0x%x\n",
unit, stat);
#endif
cond = sderror(unit, sc, hp, stat);
if (cond) {
if (cond < 0 && sdtab[unit].b_errcnt++ < SDRETRY) {
#ifdef DEBUG
if (sddebug & SDB_ERROR)
printf("sd%d: retry #%d\n",
unit, sdtab[unit].b_errcnt);
#endif
sdstart(unit);
return;
}
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
}
}
sdfinish(unit, sc, bp);
}
int
sdread(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
register int unit = sdunit(dev);
register int pid;
if ((pid = sd_softc[unit].sc_format_pid) >= 0 &&
pid != uio->uio_procp->p_pid)
return (EPERM);
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);
register int pid;
if ((pid = sd_softc[unit].sc_format_pid) >= 0 &&
pid != uio->uio_procp->p_pid)
return (EPERM);
return (physio(sdstrategy, NULL, dev, B_WRITE, minphys, uio));
}
int
sdioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long 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 = &sc->sc_info.si_label;
int error, flags;
switch (cmd) {
default:
return (EINVAL);
case DIOCGDINFO:
*(struct disklabel *)data = *lp;
return (0);
case DIOCGPART:
((struct partinfo *)data)->disklab = lp;
((struct partinfo *)data)->part =
&lp->d_partitions[sdpart(dev)];
return (0);
case DIOCWLABEL:
if ((flag & FWRITE) == 0)
return (EBADF);
if (*(int *)data)
sc->sc_flags |= SDF_WLABEL;
else
sc->sc_flags &= ~SDF_WLABEL;
return (0);
case DIOCSDINFO:
if ((flag & FWRITE) == 0)
return (EBADF);
error = setdisklabel(lp, (struct disklabel *)data,
(sc->sc_flags & SDF_WLABEL) ? 0
: sc->sc_info.si_open);
return (error);
case DIOCWDINFO:
if ((flag & FWRITE) == 0)
return (EBADF);
error = setdisklabel(lp, (struct disklabel *)data,
(sc->sc_flags & SDF_WLABEL) ? 0
: sc->sc_info.si_open);
if (error)
return (error);
flags = sc->sc_flags;
sc->sc_flags = SDF_ALIVE | SDF_WLABEL;
error = writedisklabel(sdlabdev(dev), sdstrategy, lp);
sc->sc_flags = flags;
return (error);
case SDIOCSFORMAT:
/* take this device into or out of "format" mode */
if (suser(p->p_ucred, &p->p_acflag))
return(EPERM);
if (*(int *)data) {
if (sc->sc_format_pid >= 0)
return (EPERM);
sc->sc_format_pid = p->p_pid;
} else
sc->sc_format_pid = -1;
return (0);
case SDIOCGFORMAT:
/* find out who has the device in format mode */
*(int *)data = sc->sc_format_pid;
return (0);
case SDIOCSCSICOMMAND:
/*
* Save what user gave us as SCSI cdb to use with next
* read or write to the char device.
*/
if (sc->sc_format_pid != p->p_pid)
return (EPERM);
if (legal_cmds[((struct scsi_fmt_cdb *)data)->cdb[0]] == 0)
return (EINVAL);
bcopy(data, (caddr_t)&sdcmd[unit], sizeof(sdcmd[0]));
return (0);
case SDIOCSENSE:
/*
* return the SCSI sense data saved after the last
* operation that completed with "check condition" status.
*/
bcopy((caddr_t)&sdsense[unit], data, sizeof(sdsense[0]));
return (0);
}
/*NOTREACHED*/
}
int
sdsize(dev)
dev_t dev;
{
register int unit = sdunit(dev);
register struct sd_softc *sc = &sd_softc[unit];
int psize, didopen = 0;
if (unit >= NSD || (sc->sc_flags & SDF_ALIVE) == 0)
return(-1);
/*
* We get called very early on (via swapconf)
* without the device being open so we may need
* to handle it here.
*/
if (sc->sc_info.si_open == 0) {
if (sdopen(dev, FREAD|FWRITE, S_IFBLK, NULL))
return(-1);
didopen = 1;
}
psize = sc->sc_info.si_label.d_partitions[sdpart(dev)].p_size;
if (didopen)
(void) sdclose(dev, FREAD|FWRITE, S_IFBLK, NULL);
return (psize);
}
/*
* Non-interrupt driven, non-dma dump routine.
*/
int
sddump(dev)
dev_t dev;
{
int part = sdpart(dev);
int unit = sdunit(dev);
register struct sd_softc *sc = &sd_softc[unit];
register struct hp_device *hp = sc->sc_hd;
register struct partition *pinfo;
register daddr_t baddr;
register int maddr;
register int pages, i;
int stat;
extern int lowram, dumpsize;
/* is drive ok? */
if (unit >= NSD || (sc->sc_flags & SDF_ALIVE) == 0)
return (ENXIO);
pinfo = &sc->sc_info.si_label.d_partitions[part];
/* dump parameters in range? */
if (dumplo < 0 || dumplo >= pinfo->p_size ||
pinfo->p_fstype != FS_SWAP)
return (EINVAL);
pages = dumpsize;
if (dumplo + ctod(pages) > pinfo->p_size)
pages = dtoc(pinfo->p_size - dumplo);
maddr = lowram;
baddr = dumplo + pinfo->p_offset;
/* scsi bus idle? */
if (!scsireq(&sc->sc_dq)) {
scsireset(hp->hp_ctlr);
sdreset(sc, sc->sc_hd);
printf("[ drive %d reset ] ", unit);
}
for (i = 0; i < pages; i++) {
#define NPGMB (1024*1024/NBPG)
/* print out how many Mbs we have dumped */
if (i && (i % NPGMB) == 0)
printf("%d ", i / NPGMB);
#undef NPBMG
pmap_enter(kernel_pmap, (vm_offset_t)vmmap, maddr,
VM_PROT_READ, TRUE);
stat = scsi_tt_write(hp->hp_ctlr, hp->hp_slave, sc->sc_punit,
vmmap, NBPG, baddr, sc->sc_bshift);
if (stat) {
printf("sddump: scsi write error 0x%x\n", stat);
return (EIO);
}
maddr += NBPG;
baddr += ctod(1);
}
return (0);
}
#endif
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.