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/* $NetBSD: sd.c,v 1.32 1997/05/05 21:09:13 thorpej Exp $ */
/*
* Copyright (c) 1996, 1997 Jason R. Thorpe. All rights reserved.
* 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 8.5 (Berkeley) 5/19/94
*/
/*
* SCSI CCS (Command Command Set) disk driver.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/device.h>
#include <sys/disk.h>
#include <sys/disklabel.h>
#include <sys/fcntl.h>
#include <sys/ioctl.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/stat.h>
#include <hp300/dev/scsireg.h>
#include <hp300/dev/scsivar.h>
#include <hp300/dev/sdvar.h>
#include <vm/vm_param.h>
#include <vm/lock.h>
#include <vm/vm_prot.h>
#include <vm/pmap.h>
#include "opt_useleds.h"
#ifdef USELEDS
#include <hp300/hp300/leds.h>
#endif
/*
extern void disksort();
extern void biodone();
extern int physio();
extern void TBIS();
*/
int sdmatch __P((struct device *, struct cfdata *, void *));
void sdattach __P((struct device *, struct device *, void *));
struct cfattach sd_ca = {
sizeof(struct sd_softc), sdmatch, sdattach
};
struct cfdriver sd_cd = {
NULL, "sd", DV_DISK
};
#ifdef DEBUG
int sddebug = 1;
#define SDB_ERROR 0x01
#define SDB_PARTIAL 0x02
#define SDB_CAPACITY 0x04
#endif
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,
};
/* bdev_decl(sd); */
/* cdev_decl(sd); */
/* XXX we should use macros to do these... */
int sdopen __P((dev_t, int, int, struct proc *));
int sdclose __P((dev_t, int, int, struct proc *));
int sdioctl __P((dev_t, u_long, caddr_t, int, struct proc *));
int sdread __P((dev_t, struct uio *, int));
void sdreset __P((struct sd_softc *));
int sdwrite __P((dev_t, struct uio *, int));
void sdstrategy __P((struct buf *));
int sddump __P((dev_t, daddr_t, caddr_t, size_t));
int sdsize __P((dev_t));
static void sdgetgeom __P((struct sd_softc *));
static void sdlblkstrat __P((struct buf *, int));
static int sderror __P((struct sd_softc *, int));
static void sdfinish __P((struct sd_softc *, struct buf *));
/*
* Perform a mode-sense on page 0x04 (rigid geometry).
*/
static void
sdgetgeom(sc)
struct sd_softc *sc;
{
struct scsi_mode_sense_geom {
struct scsi_modesense_hdr header;
struct scsi_geometry geom;
} sensebuf;
struct scsi_fmt_cdb modesense_geom = {
6,
{ CMD_MODE_SENSE, 0, 0x04, 0, sizeof(sensebuf), 0 }
};
int ctlr, slave, unit;
ctlr = sc->sc_dev.dv_parent->dv_unit;
slave = sc->sc_target;
unit = sc->sc_lun;
scsi_delay(-1); /* XXX */
(void)scsi_immed_command(ctlr, slave, unit, &modesense_geom,
(u_char *)&sensebuf, sizeof(sensebuf), B_READ);
scsi_delay(0); /* XXX */
sc->sc_heads = sensebuf.geom.heads;
sc->sc_cyls = (sensebuf.geom.cyl_ub << 16) |
(sensebuf.geom.cyl_mb << 8) | sensebuf.geom.cyl_lb;
}
int
sdmatch(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct oscsi_attach_args *osa = aux;
switch (osa->osa_inqbuf->type) {
case 0: /* disk */
case 4: /* WORM */
case 5: /* CD-ROM */
case 7: /* Magneto-optical */
break;
default: /* not a disk */
return 0;
}
return (1);
}
void
sdattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct sd_softc *sc = (struct sd_softc *)self;
struct oscsi_attach_args *osa = aux;
/*
* XXX formerly 0 meant unused but now pid 0 can legitimately
* use this interface (sdgetcapacity).
*/
sc->sc_format_pid = -1;
sc->sc_flags = 0;
sc->sc_target = osa->osa_target;
sc->sc_lun = osa->osa_lun;
sc->sc_type = osa->osa_inqbuf->type;
if (osa->osa_inqbuf->qual & 0x80)
sc->sc_flags |= SDF_RMEDIA;
printf("\n");
/* Initialize the SCSI queue entry. */
sc->sc_sq.sq_softc = sc;
sc->sc_sq.sq_target = sc->sc_target;
sc->sc_sq.sq_lun = sc->sc_lun;
sc->sc_sq.sq_start = sdstart;
sc->sc_sq.sq_go = sdgo;
sc->sc_sq.sq_intr = sdintr;
if (sdgetcapacity(sc, NODEV) < 0) {
printf("%s: getcapacity failed!\n", sc->sc_dev.dv_xname);
return;
}
/*
* Print out some additional information.
*/
printf("%s: ", sc->sc_dev.dv_xname);
switch (sc->sc_type) {
case 4:
printf("WORM, ");
break;
case 5:
printf("CD-ROM, ");
break;
case 7:
printf("Magneto-optical, ");
break;
default:
printf("%d cylinders, %d heads, ",
sc->sc_cyls, sc->sc_heads);
}
if (sc->sc_blks)
printf("%d blocks, %d bytes/block\n",
sc->sc_blks >> sc->sc_bshift, sc->sc_blksize);
else
printf("drive empty\n");
/* Initialize the disk structure. */
sc->sc_dkdev.dk_name = sc->sc_dev.dv_xname;
/* Attach the disk. */
disk_attach(&sc->sc_dkdev);
sc->sc_flags |= SDF_ALIVE;
}
void
sdreset(sc)
struct sd_softc *sc;
{
sc->sc_stats.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, dev)
struct sd_softc *sc;
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) {
scsi_delay(-1); /* XXX */
i = scsi_immed_command(sc->sc_dev.dv_parent->dv_unit,
sc->sc_target, sc->sc_lun, &cap, capbuf,
capbufsize, B_READ);
scsi_delay(0); /* XXX */
} 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(&cap, &sc->sc_cmdstore, 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) ? sc->sc_sensestore.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("%s: read_capacity returns %d\n",
sc->sc_dev.dv_xname, 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("%s: removable media not present\n",
sc->sc_dev.dv_xname);
#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("%s: need at least %d byte blocks - %s\n",
sc->sc_dev.dv_xname, 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("%s: blks=%d, blksize=%d, bshift=%d\n",
sc->sc_dev.dv_xname, sc->sc_blks, sc->sc_blksize,
sc->sc_bshift);
#endif
sdgetgeom(sc);
return (0);
}
/*
* Read or constuct a disklabel
*/
int
sdgetinfo(dev)
dev_t dev;
{
int unit = sdunit(dev);
struct sd_softc *sc = sd_cd.cd_devs[unit];
struct disklabel *lp = sc->sc_dkdev.dk_label;
struct partition *pi;
char *msg;
#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, 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, NULL);
if (msg == NULL)
return (0);
}
pi = lp->d_partitions;
printf("%s: WARNING: %s, ", sc->sc_dev.dv_xname, 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;
{
int unit = sdunit(dev);
struct sd_softc *sc;
int error, mask, part;
if (unit >= sd_cd.cd_ndevs ||
(sc = sd_cd.cd_devs[unit]) == NULL ||
(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_dkdev.dk_openmask == 0) {
sc->sc_flags |= SDF_OPENING;
error = sdgetinfo(dev);
sc->sc_flags &= ~SDF_OPENING;
wakeup((caddr_t)sc);
if (error)
return(error);
}
part = sdpart(dev);
mask = 1 << part;
/* Check that the partition exists. */
if (part != RAW_PART &&
(part >= sc->sc_dkdev.dk_label->d_npartitions ||
sc->sc_dkdev.dk_label->d_partitions[part].p_fstype == FS_UNUSED))
return (ENXIO);
/* Ensure only one open at a time. */
switch (mode) {
case S_IFCHR:
sc->sc_dkdev.dk_copenmask |= mask;
break;
case S_IFBLK:
sc->sc_dkdev.dk_bopenmask |= mask;
break;
}
sc->sc_dkdev.dk_openmask =
sc->sc_dkdev.dk_copenmask | sc->sc_dkdev.dk_bopenmask;
return(0);
}
int
sdclose(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
int unit = sdunit(dev);
struct sd_softc *sc = sd_cd.cd_devs[unit];
struct disk *dk = &sc->sc_dkdev;
int mask, s;
mask = 1 << sdpart(dev);
if (mode == S_IFCHR)
dk->dk_copenmask &= ~mask;
else
dk->dk_bopenmask &= ~mask;
dk->dk_openmask = dk->dk_copenmask | dk->dk_bopenmask;
/*
* 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 (dk->dk_openmask == 0) {
sc->sc_flags |= SDF_CLOSING;
s = splbio();
while (sc->sc_tab.b_active) {
sc->sc_flags |= SDF_WANTED;
sleep((caddr_t)&sc->sc_tab, 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)
struct buf *bp;
int bsize;
{
struct sd_softc *sc = sd_cd.cd_devs[sdunit(bp->b_dev)];
struct buf *cbp = (struct buf *)malloc(sizeof(struct buf),
M_DEVBUF, M_WAITOK);
caddr_t cbuf = (caddr_t)malloc(bsize, M_DEVBUF, M_WAITOK);
int bn, resid;
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 %p flags %lx bn %x resid %x addr %p\n",
bp, bp->b_flags, bn, resid, addr);
#endif
while (resid > 0) {
int boff = dbtob(bn) & (bsize - 1);
int count;
if (boff || resid < bsize) {
sc->sc_stats.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 %p\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 %p\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 %p\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 %p\n",
bn, resid, addr);
#endif
}
free(cbuf, M_DEVBUF);
free(cbp, M_DEVBUF);
}
void
sdstrategy(bp)
struct buf *bp;
{
int unit = sdunit(bp->b_dev);
struct sd_softc *sc = sd_cd.cd_devs[unit];
struct buf *dp = &sc->sc_tab;
struct partition *pinfo;
daddr_t bn;
int sz, s;
int offset;
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_dkdev.dk_label->d_partitions[sdpart(bp->b_dev)];
/* Don't perform partition translation on RAW_PART. */
offset = (sdpart(bp->b_dev) == RAW_PART) ? 0 : pinfo->p_offset;
if (sdpart(bp->b_dev) != RAW_PART) {
/*
* XXX This block of code belongs in
* XXX bounds_check_with_label()
*/
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 + offset <= LABELSECTOR &&
#if LABELSECTOR != 0
bn + 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 + 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)
int unit;
{
struct sd_softc *sc = sd_cd.cd_devs[unit];
if (scsireq(sc->sc_dev.dv_parent, &sc->sc_sq))
sdstart(sc);
}
/*
* Return:
* 0 if not really an error
* <0 if we should do a retry
* >0 if a fatal error
*/
static int
sderror(sc, stat)
struct sd_softc *sc;
int stat;
{
int cond = 1;
sc->sc_sensestore.status = stat;
if (stat & STS_CHECKCOND) {
struct scsi_xsense *sp;
scsi_request_sense(sc->sc_dev.dv_parent->dv_unit,
sc->sc_target, sc->sc_lun, sc->sc_sensestore.sense,
sizeof(sc->sc_sensestore.sense));
sp = (struct scsi_xsense *)(sc->sc_sensestore.sense);
printf("%s: scsi sense class %d, code %d", sc->sc_dev.dv_xname,
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(sc, bp)
struct sd_softc *sc;
struct buf *bp;
{
struct buf *dp = &sc->sc_tab;
dp->b_errcnt = 0;
dp->b_actf = bp->b_actf;
bp->b_resid = 0;
biodone(bp);
scsifree(sc->sc_dev.dv_parent, &sc->sc_sq);
if (dp->b_actf)
sdustart(sc->sc_dev.dv_unit);
else {
dp->b_active = 0;
if (sc->sc_flags & SDF_WANTED) {
sc->sc_flags &= ~SDF_WANTED;
wakeup((caddr_t)dp);
}
}
}
void
sdstart(arg)
void *arg;
{
struct sd_softc *sc = arg;
/*
* 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[sc->sc_cmdstore.cdb[0]] > 0) {
struct buf *bp = sc->sc_tab.b_actf;
int sts;
sc->sc_tab.b_errcnt = 0;
while (1) {
sts = scsi_immed_command(sc->sc_dev.dv_parent->dv_unit,
sc->sc_target, sc->sc_lun, &sc->sc_cmdstore,
bp->b_un.b_addr, bp->b_bcount,
bp->b_flags & B_READ);
sc->sc_sensestore.status = sts;
if ((sts & 0xfe) == 0 ||
(sts = sderror(sc, sts)) == 0)
break;
if (sts > 0 || sc->sc_tab.b_errcnt++ >= SDRETRY) {
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
break;
}
}
sdfinish(sc, bp);
} else if (scsiustart(sc->sc_dev.dv_parent->dv_unit))
sdgo(sc);
}
void
sdgo(arg)
void *arg;
{
struct sd_softc *sc = arg;
struct buf *bp = sc->sc_tab.b_actf;
int pad;
struct scsi_fmt_cdb *cmd;
if (sc->sc_format_pid >= 0) {
cmd = &sc->sc_cmdstore;
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(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("%s: partial block xfer -- %lx bytes\n",
sc->sc_dev.dv_xname, bp->b_bcount);
#endif
sc->sc_stats.sdtransfers++;
}
#ifdef USELEDS
ledcontrol(0, 0, LED_DISK);
#endif
if (scsigo(sc->sc_dev.dv_parent->dv_unit, sc->sc_target, sc->sc_lun,
bp, cmd, pad) == 0) {
/* Instrumentation. */
disk_busy(&sc->sc_dkdev);
sc->sc_dkdev.dk_seek++; /* XXX */
return;
}
#ifdef DEBUG
if (sddebug & SDB_ERROR)
printf("%s: sdstart: %s adr %p blk %ld len %ld ecnt %ld\n",
sc->sc_dev.dv_xname,
bp->b_flags & B_READ? "read" : "write",
bp->b_un.b_addr, bp->b_cylin, bp->b_bcount,
sc->sc_tab.b_errcnt);
#endif
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
sdfinish(sc, bp);
}
void
sdintr(arg, stat)
void *arg;
int stat;
{
struct sd_softc *sc = arg;
struct buf *bp = sc->sc_tab.b_actf;
int cond;
if (bp == NULL) {
printf("%s: bp == NULL\n", sc->sc_dev.dv_xname);
return;
}
disk_unbusy(&sc->sc_dkdev, (bp->b_bcount - bp->b_resid));
if (stat) {
#ifdef DEBUG
if (sddebug & SDB_ERROR)
printf("%s: sdintr: bad scsi status 0x%x\n",
sc->sc_dev.dv_xname, stat);
#endif
cond = sderror(sc, stat);
if (cond) {
if (cond < 0 && sc->sc_tab.b_errcnt++ < SDRETRY) {
#ifdef DEBUG
if (sddebug & SDB_ERROR)
printf("%s: retry #%ld\n",
sc->sc_dev.dv_xname,
sc->sc_tab.b_errcnt);
#endif
sdstart(sc);
return;
}
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
}
}
sdfinish(sc, bp);
}
int
sdread(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
int unit = sdunit(dev);
struct sd_softc *sc = sd_cd.cd_devs[unit];
int pid;
if ((pid = sc->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;
{
int unit = sdunit(dev);
struct sd_softc *sc = sd_cd.cd_devs[unit];
int pid;
if ((pid = sc->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);
struct sd_softc *sc = sd_cd.cd_devs[unit];
struct disklabel *lp = sc->sc_dkdev.dk_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_dkdev.dk_openmask,
(struct cpu_disklabel *)0);
return (error);
case DIOCWDINFO:
if ((flag & FWRITE) == 0)
return (EBADF);
error = setdisklabel(lp, (struct disklabel *)data,
(sc->sc_flags & SDF_WLABEL) ? 0
: sc->sc_dkdev.dk_openmask,
(struct cpu_disklabel *)0);
if (error)
return (error);
flags = sc->sc_flags;
sc->sc_flags = SDF_ALIVE | SDF_WLABEL;
error = writedisklabel(sdlabdev(dev), sdstrategy, lp,
(struct cpu_disklabel *)0);
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, &sc->sc_cmdstore, sizeof(struct scsi_fmt_cdb));
return (0);
case SDIOCSENSE:
/*
* return the SCSI sense data saved after the last
* operation that completed with "check condition" status.
*/
bcopy(&sc->sc_sensestore, data, sizeof(sc->sc_sensestore));
return (0);
}
/*NOTREACHED*/
}
int
sdsize(dev)
dev_t dev;
{
int unit = sdunit(dev);
struct sd_softc *sc = sd_cd.cd_devs[unit];
int psize, didopen = 0;
if (unit >= sd_cd.cd_ndevs ||
(sc = sd_cd.cd_devs[unit]) == NULL ||
(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_dkdev.dk_openmask == 0) {
if (sdopen(dev, FREAD|FWRITE, S_IFBLK, NULL))
return(-1);
didopen = 1;
}
psize = sc->sc_dkdev.dk_label->d_partitions[sdpart(dev)].p_size;
if (didopen)
(void) sdclose(dev, FREAD|FWRITE, S_IFBLK, NULL);
return (psize);
}
static int sddoingadump; /* simple mutex */
/*
* Non-interrupt driven, non-dma dump routine.
*/
int
sddump(dev, blkno, va, size)
dev_t dev;
daddr_t blkno;
caddr_t va;
size_t size;
{
int sectorsize; /* size of a disk sector */
int nsects; /* number of sectors in partition */
int sectoff; /* sector offset of partition */
int totwrt; /* total number of sectors left to write */
int nwrt; /* current number of sectors to write */
int unit, part;
struct sd_softc *sc;
struct disklabel *lp;
char stat;
/* Check for recursive dump; if so, punt. */
if (sddoingadump)
return (EFAULT);
sddoingadump = 1;
/* Decompose unit and partition. */
unit = sdunit(dev);
part = sdpart(dev);
/* Make sure device is ok. */
if (unit >= sd_cd.cd_ndevs ||
(sc = sd_cd.cd_devs[unit]) == NULL ||
(sc->sc_flags & SDF_ALIVE) == 0)
return (ENXIO);
/*
* Convert to disk sectors. Request must be a multiple of size.
*/
lp = sc->sc_dkdev.dk_label;
sectorsize = lp->d_secsize;
if ((size % sectorsize) != 0)
return (EFAULT);
totwrt = size / sectorsize;
blkno = dbtob(blkno) / sectorsize; /* blkno in DEV_BSIZE units */
nsects = lp->d_partitions[part].p_size;
sectoff = lp->d_partitions[part].p_offset;
/* Check transfer bounds against partition size. */
if ((blkno < 0) || (blkno + totwrt) > nsects)
return (EINVAL);
/* Offset block number to start of partition. */
blkno += sectoff;
while (totwrt > 0) {
nwrt = totwrt; /* XXX */
#ifndef SD_DUMP_NOT_TRUSTED
/*
* Send the data. Note the `0' argument for bshift;
* we've done the necessary conversion above.
*/
stat = scsi_tt_write(sc->sc_dev.dv_parent->dv_unit,
sc->sc_target, sc->sc_lun, va, nwrt * sectorsize,
blkno, 0);
if (stat) {
printf("\nsddump: scsi write error 0x%x\n", stat);
return (EIO);
}
#else /* SD_DUMP_NOT_TRUSTED */
/* Lets just talk about it first. */
printf("%s: dump addr %p, blk %d\n", sc->sc_dev.dv_xname,
va, blkno);
delay(500 * 1000); /* half a second */
#endif /* SD_DUMP_NOT_TRUSTED */
/* update block count */
totwrt -= nwrt;
blkno += nwrt;
va += sectorsize * nwrt;
}
sddoingadump = 0;
return (0);
}
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