Net2/usr/src/sys/hp300/dev/sd.c
/*
* Copyright (c) 1990 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 7.8 (Berkeley) 6/9/91
*/
/*
* SCSI CCS (Command Command Set) disk driver.
*/
#include "sd.h"
#if NSD > 0
#ifndef lint
static char rcsid[] = "$Header: sd.c,v 1.15 91/04/24 11:54:30 mike Exp $";
#endif
#include "sys/param.h"
#include "sys/systm.h"
#include "sys/buf.h"
#include "sys/dkstat.h"
#include "sys/disklabel.h"
#include "sys/malloc.h"
#include "sys/proc.h"
#include "device.h"
#include "scsireg.h"
#include "vm/vm_param.h"
#include "vm/lock.h"
#include "vm/vm_statistics.h"
#include "vm/pmap.h"
#include "vm/vm_prot.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,
};
struct size {
u_long strtblk;
u_long endblk;
int nblocks;
};
struct sdinfo {
struct size part[8];
};
/*
* since the SCSI standard tends to hide the disk structure, we define
* partitions in terms of DEV_BSIZE blocks. The default partition table
* (for an unlabeled disk) reserves 512K for a boot area, has an 8 meg
* root and 32 meg of swap. The rest of the space on the drive goes in
* the G partition. As usual, the C partition covers the entire disk
* (including the boot area).
*/
struct sdinfo sddefaultpart = {
1024, 17408, 16384 , /* A */
17408, 82944, 65536 , /* B */
0, 0, 0 , /* C */
17408, 115712, 98304 , /* D */
115712, 218112, 102400 , /* E */
218112, 0, 0 , /* F */
82944, 0, 0 , /* G */
115712, 0, 0 , /* H */
};
struct sd_softc {
struct hp_device *sc_hd;
struct devqueue sc_dq;
int sc_format_pid; /* process using "format" mode */
short sc_flags;
short sc_type; /* drive type */
short sc_punit; /* physical unit (scsi lun) */
u_short sc_bshift; /* convert device blocks to DEV_BSIZE blks */
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. */
struct sdinfo sc_info; /* drive partition table & label info */
} sd_softc[NSD];
/* sc_flags values */
#define SDF_ALIVE 0x1
#ifdef DEBUG
int sddebug = 1;
#define SDB_ERROR 0x01
#define SDB_PARTIAL 0x02
#endif
struct sdstats {
long sdresets;
long sdtransfers;
long sdpartials;
} 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 };
#define sdunit(x) (minor(x) >> 3)
#define sdpart(x) (minor(x) & 0x7)
#define sdpunit(x) ((x) & 7)
#define b_cylin b_resid
#define SDRETRY 2
/*
* 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 u_char capbuf[8];
struct scsi_fmt_cdb cap = {
10,
CMD_READ_CAPACITY, 0, 0, 0, 0, 0, 0, 0, 0, 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 ismo = 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 (ismo)
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 MO with no media */
case 2:
if (sp->len == 12 &&
sensebuf[12] == 10) /* XXX */
ismo = 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
*/
if (inqbuf.version != 1) {
bcopy("UNKNOWN", &idstr[0], 8);
bcopy("DRIVE TYPE", &idstr[8], 11);
} else {
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;
}
i = scsi_immed_command(ctlr, slave, unit, &cap,
(u_char *)&capbuf, sizeof(capbuf), B_READ);
if (i) {
if (i != STS_CHECKCOND ||
bcmp(&idstr[0], "HP", 3) ||
bcmp(&idstr[8], "S6300.650A", 11))
goto failed;
/* XXX unformatted or non-existant MO media; fake it */
sc->sc_blks = 318664;
sc->sc_blksize = 1024;
} else {
sc->sc_blks = *(u_int *)&capbuf[0];
sc->sc_blksize = *(int *)&capbuf[4];
}
/* return value of read capacity is last valid block number */
sc->sc_blks++;
if (inqbuf.version != 1)
printf("sd%d: type 0x%x, qual 0x%x, ver %d", hd->hp_unit,
inqbuf.type, inqbuf.qual, inqbuf.version);
else
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) {
if (sc->sc_blksize < DEV_BSIZE) {
printf("sd%d: need %d byte blocks - drive ignored\n",
unit, DEV_BSIZE);
goto failed;
}
for (i = sc->sc_blksize; i > DEV_BSIZE; i >>= 1)
++sc->sc_bshift;
sc->sc_blks <<= sc->sc_bshift;
}
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_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;
/*
* If we don't have a disk label, build a default partition
* table with 'standard' size root & swap and everything else
* in the G partition.
*/
sc->sc_info = sddefaultpart;
/* C gets everything */
sc->sc_info.part[2].nblocks = sc->sc_blks;
sc->sc_info.part[2].endblk = sc->sc_blks;
/* G gets from end of B to end of disk */
sc->sc_info.part[6].nblocks = sc->sc_blks - sc->sc_info.part[1].endblk;
sc->sc_info.part[6].endblk = sc->sc_blks;
/*
* We also define the D, E and F paritions as an alternative to
* B and G. D is 48Mb, starts after A and is intended for swapping.
* E is 50Mb, starts after D and is intended for /usr. F starts
* after E and is what ever is left.
*/
if (sc->sc_blks >= sc->sc_info.part[4].endblk) {
sc->sc_info.part[5].nblocks =
sc->sc_blks - sc->sc_info.part[4].endblk;
sc->sc_info.part[5].endblk = sc->sc_blks;
} else {
sc->sc_info.part[5].strtblk = 0;
sc->sc_info.part[3] = sc->sc_info.part[5];
sc->sc_info.part[4] = sc->sc_info.part[5];
}
/*
* H is a single partition alternative to E and F.
*/
if (sc->sc_blks >= sc->sc_info.part[3].endblk) {
sc->sc_info.part[7].nblocks =
sc->sc_blks - sc->sc_info.part[3].endblk;
sc->sc_info.part[7].endblk = sc->sc_blks;
} else {
sc->sc_info.part[7].strtblk = 0;
}
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++;
}
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);
}
/*
* 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;
{
register int unit = sdunit(bp->b_dev);
register struct sd_softc *sc = &sd_softc[unit];
register struct size *pinfo = &sc->sc_info.part[sdpart(bp->b_dev)];
register struct buf *dp = &sdtab[unit];
register daddr_t bn;
register int sz, s;
if (sc->sc_format_pid) {
if (sc->sc_format_pid != curproc->p_pid) { /* XXX */
bp->b_error = EPERM;
bp->b_flags |= B_ERROR;
goto done;
}
bp->b_cylin = 0;
} else {
bn = bp->b_blkno;
sz = howmany(bp->b_bcount, DEV_BSIZE);
if (bn < 0 || bn + sz > pinfo->nblocks) {
sz = pinfo->nblocks - 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);
}
/*
* 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->strtblk) >> sc->sc_bshift;
}
s = splbio();
disksort(dp, bp);
if (dp->b_active == 0) {
dp->b_active = 1;
sdustart(unit);
}
splx(s);
return;
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;
}
}
printf("\n");
}
return(cond);
}
static void
sdfinish(unit, sc, bp)
int unit;
register struct sd_softc *sc;
register struct buf *bp;
{
sdtab[unit].b_errcnt = 0;
sdtab[unit].b_actf = bp->b_actf;
bp->b_resid = 0;
biodone(bp);
scsifree(&sc->sc_dq);
if (sdtab[unit].b_actf)
sdustart(unit);
else
sdtab[unit].b_active = 0;
}
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 && legal_cmds[sdcmd[unit].cdb[0]] > 0) {
register struct buf *bp = sdtab[unit].b_actf;
register int sts;
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) {
(void) sderror(unit, sc, hp, sts);
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
}
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) {
cmd = &sdcmd[unit];
pad = 0;
} else {
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++;
}
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) &&
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) &&
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;
int cmd;
caddr_t data;
int flag;
struct proc *p;
{
register int unit = sdunit(dev);
register struct sd_softc *sc = &sd_softc[unit];
switch (cmd) {
default:
return (EINVAL);
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)
return (EPERM);
sc->sc_format_pid = p->p_pid;
} else
sc->sc_format_pid = 0;
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];
if (unit >= NSD || (sc->sc_flags & SDF_ALIVE) == 0)
return(-1);
return(sc->sc_info.part[sdpart(dev)].nblocks);
}
/*
* 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 daddr_t baddr;
register int maddr;
register int pages, i;
int stat;
extern int lowram;
/*
* Hmm... all vax drivers dump maxfree pages which is physmem minus
* the message buffer. Is there a reason for not dumping the
* message buffer? Savecore expects to read 'dumpsize' pages of
* dump, where dumpsys() sets dumpsize to physmem!
*/
pages = physmem;
/* is drive ok? */
if (unit >= NSD || (sc->sc_flags & SDF_ALIVE) == 0)
return (ENXIO);
/* dump parameters in range? */
if (dumplo < 0 || dumplo >= sc->sc_info.part[part].nblocks)
return (EINVAL);
if (dumplo + ctod(pages) > sc->sc_info.part[part].nblocks)
pages = dtoc(sc->sc_info.part[part].nblocks - dumplo);
maddr = lowram;
baddr = dumplo + sc->sc_info.part[part].strtblk;
/* 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(pmap_kernel(), 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