NetBSD/sys/dev/ofw/ofdisk.c

433 lines
9.9 KiB
C

/* $NetBSD: ofdisk.c,v 1.6 1997/07/23 18:42:40 thorpej Exp $ */
/*
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
* Copyright (C) 1995, 1996 TooLs GmbH.
* All rights reserved.
*
* 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 TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
*/
#include <sys/param.h>
#include <sys/buf.h>
#include <sys/device.h>
#include <sys/disklabel.h>
#include <sys/disk.h>
#include <sys/fcntl.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <dev/ofw/openfirm.h>
struct ofd_softc {
struct device sc_dev;
int sc_phandle;
int sc_unit;
int sc_flags;
struct disk sc_dk;
int sc_ihandle;
u_long max_transfer;
char sc_name[16];
};
/* sc_flags */
#define OFDF_ISFLOPPY 0x01 /* we are a floppy drive */
static int ofdprobe __P((struct device *, struct cfdata *, void *));
static void ofdattach __P((struct device *, struct device *, void *));
struct cfattach ofdisk_ca = {
sizeof(struct ofd_softc), ofdprobe, ofdattach
};
struct cfdriver ofdisk_cd = {
NULL, "ofdisk", DV_DISK
};
void ofdstrategy __P((struct buf *));
struct dkdriver ofdkdriver = { ofdstrategy };
static int
ofdprobe(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct ofprobe *ofp = aux;
char type[8];
int l;
if ((l = OF_getprop(ofp->phandle, "device_type", type,
sizeof type - 1)) < 0)
return 0;
if (l >= sizeof type)
return 0;
type[l] = 0;
return !strcmp(type, "block");
}
static void
ofdattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct ofd_softc *of = (void *)self;
struct ofprobe *ofp = aux;
char child[64];
int l;
if ((l = OF_getprop(ofp->phandle, "name", child,
sizeof child - 1)) < 0)
panic("device without name?");
if (l >= sizeof child)
l = sizeof child - 1;
child[l] = 0;
of->sc_flags = 0;
of->sc_phandle = ofp->phandle;
of->sc_unit = ofp->unit;
of->sc_ihandle = 0;
of->sc_dk.dk_driver = &ofdkdriver;
of->sc_dk.dk_name = of->sc_name;
strcpy(of->sc_name, of->sc_dev.dv_xname);
disk_attach(&of->sc_dk);
dk_establish(&of->sc_dk, self); /* XXX */
printf("\n");
if (strcmp(child, "floppy") == 0)
of->sc_flags |= OFDF_ISFLOPPY;
}
int
ofdopen(dev, flags, fmt, p)
dev_t dev;
int flags;
int fmt;
struct proc *p;
{
int unit = DISKUNIT(dev);
struct ofd_softc *of;
char path[256];
struct disklabel *lp;
char *errmes;
int l;
if (unit >= ofdisk_cd.cd_ndevs)
return ENXIO;
if (!(of = ofdisk_cd.cd_devs[unit]))
return ENXIO;
if (!of->sc_ihandle) {
if ((l = OF_package_to_path(of->sc_phandle, path,
sizeof path - 3)) < 0)
return ENXIO;
if (l >= sizeof path - 3)
return ENXIO;
path[l] = 0;
/*
* XXX This is for the benefit of SCSI/IDE disks that don't
* XXX have all their childs in the device tree.
* XXX YES, I DO THINK THIS IS A BUG IN OPENFIRMWARE!!!
* XXX And yes, this is a very gross hack!
* XXX See also ofscsi.c
*/
if (!strcmp(path + l - 4, "disk")) {
path[l++] = '@';
path[l++] = '0' + of->sc_unit;
path[l] = 0;
}
strcat(path, ":0");
if (!(of->sc_ihandle = OF_open(path)))
return ENXIO;
/*
* Try to get characteristics of the disk.
*/
of->max_transfer = OF_call_method_1("max-transfer",
of->sc_ihandle, 0);
if (of->max_transfer > MAXPHYS)
of->max_transfer = MAXPHYS;
lp = of->sc_dk.dk_label;
bzero(lp, sizeof *lp);
/*
* XXX Firmware bug? Asking for block size gives a
* XXX rediculous number! So we use what the boot program
* XXX uses.
*/
lp->d_secsize = DEV_BSIZE;
lp->d_secperunit = OF_call_method_1("#blocks",
of->sc_ihandle, 0);
if (lp->d_secperunit == (u_int32_t)-1)
lp->d_secperunit = 0x7fffffff;
lp->d_secpercyl = 1;
lp->d_nsectors = 1;
lp->d_ntracks = 1;
lp->d_ncylinders = lp->d_secperunit;
lp->d_partitions[RAW_PART].p_offset = 0;
lp->d_partitions[RAW_PART].p_size = lp->d_secperunit;
lp->d_npartitions = RAW_PART + 1;
/*
* Don't read the disklabel on a floppy; simply
* assign all partitions the same size/offset as
* RAW_PART. (This is essentially what the ISA
* floppy driver does, but we don't deal with
* density stuff.)
*/
if (of->sc_flags & OFDF_ISFLOPPY) {
lp->d_npartitions = MAXPARTITIONS;
for (l = 0; l < lp->d_npartitions; l++) {
if (l == RAW_PART)
continue;
/* struct copy */
lp->d_partitions[l] =
lp->d_partitions[RAW_PART];
}
} else {
errmes = readdisklabel(MAKEDISKDEV(major(dev),
unit, RAW_PART), ofdstrategy, lp,
of->sc_dk.dk_cpulabel);
if (errmes != NULL)
printf("%s: %s\n", errmes);
}
}
switch (fmt) {
case S_IFCHR:
of->sc_dk.dk_copenmask |= 1 << DISKPART(dev);
break;
case S_IFBLK:
of->sc_dk.dk_bopenmask |= 1 << DISKPART(dev);
break;
}
of->sc_dk.dk_openmask =
of->sc_dk.dk_copenmask | of->sc_dk.dk_bopenmask;
return 0;
}
int
ofdclose(dev, flags, fmt, p)
dev_t dev;
int flags;
int fmt;
struct proc *p;
{
struct ofd_softc *of = ofdisk_cd.cd_devs[DISKUNIT(dev)];
switch (fmt) {
case S_IFCHR:
of->sc_dk.dk_copenmask &= ~(1 << DISKPART(dev));
break;
case S_IFBLK:
of->sc_dk.dk_bopenmask &= ~(1 << DISKPART(dev));
break;
}
of->sc_dk.dk_openmask = of->sc_dk.dk_copenmask | of->sc_dk.dk_bopenmask;
#ifdef FIRMWORKSBUGS
/*
* This is a hack to get the firmware to flush its buffers.
*/
OF_seek(of->sc_ihandle, 0);
#endif
if (!of->sc_dk.dk_openmask) {
OF_close(of->sc_ihandle);
of->sc_ihandle = 0;
}
return 0;
}
void
ofdstrategy(bp)
struct buf *bp;
{
struct ofd_softc *of = ofdisk_cd.cd_devs[DISKUNIT(bp->b_dev)];
struct partition *p;
u_quad_t off;
int read;
int (*OF_io)(int, void *, int);
daddr_t blkno = bp->b_blkno;
bp->b_resid = 0;
if (bp->b_bcount == 0)
goto done;
OF_io = bp->b_flags & B_READ ? OF_read : OF_write;
if (DISKPART(bp->b_dev) != RAW_PART) {
if (bounds_check_with_label(bp, of->sc_dk.dk_label, 0) <= 0) {
bp->b_resid = bp->b_bcount;
goto done;
}
p = &of->sc_dk.dk_label->d_partitions[DISKPART(bp->b_dev)];
blkno = bp->b_blkno + p->p_offset;
}
disk_busy(&of->sc_dk);
off = (u_quad_t)blkno * DEV_BSIZE;
read = -1;
do {
if (OF_seek(of->sc_ihandle, off) < 0)
break;
read = OF_io(of->sc_ihandle, bp->b_data, bp->b_bcount);
} while (read == -2);
if (read < 0) {
bp->b_error = EIO;
bp->b_flags |= B_ERROR;
bp->b_resid = bp->b_bcount;
} else
bp->b_resid = bp->b_bcount - read;
disk_unbusy(&of->sc_dk, bp->b_bcount - bp->b_resid);
done:
biodone(bp);
}
static void
ofminphys(bp)
struct buf *bp;
{
struct ofd_softc *of = ofdisk_cd.cd_devs[DISKUNIT(bp->b_dev)];
if (bp->b_bcount > of->max_transfer)
bp->b_bcount = of->max_transfer;
}
int
ofdread(dev, uio)
dev_t dev;
struct uio *uio;
{
return physio(ofdstrategy, NULL, dev, B_READ, ofminphys, uio);
}
int
ofdwrite(dev, uio)
dev_t dev;
struct uio *uio;
{
return physio(ofdstrategy, NULL, dev, B_WRITE, ofminphys, uio);
}
int
ofdioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
struct ofd_softc *of = ofdisk_cd.cd_devs[DISKUNIT(dev)];
int error;
switch (cmd) {
case DIOCGDINFO:
*(struct disklabel *)data = *of->sc_dk.dk_label;
return 0;
case DIOCGPART:
((struct partinfo *)data)->disklab = of->sc_dk.dk_label;
((struct partinfo *)data)->part =
&of->sc_dk.dk_label->d_partitions[DISKPART(dev)];
return 0;
case DIOCWDINFO:
case DIOCSDINFO:
if ((flag & FWRITE) == 0)
return EBADF;
error = setdisklabel(of->sc_dk.dk_label,
(struct disklabel *)data, /*of->sc_dk.dk_openmask */0,
of->sc_dk.dk_cpulabel);
if (error == 0 && cmd == DIOCWDINFO)
error = writedisklabel(MAKEDISKDEV(major(dev),
DISKUNIT(dev), RAW_PART), ofdstrategy,
of->sc_dk.dk_label, of->sc_dk.dk_cpulabel);
return error;
default:
return ENOTTY;
}
}
int
ofddump(dev, blkno, va, size)
dev_t dev;
daddr_t blkno;
caddr_t va;
size_t size;
{
return EINVAL;
}
int
ofdsize(dev)
dev_t dev;
{
struct ofd_softc *of;
struct disklabel *lp;
int size, part, omask, unit;
unit = DISKUNIT(dev);
if (unit >= ofdisk_cd.cd_ndevs ||
(of = ofdisk_cd.cd_devs[unit]) == NULL)
return -1;
part = DISKPART(dev);
omask = of->sc_dk.dk_openmask & (1 << part);
lp = of->sc_dk.dk_label;
if (omask == 0 && ofdopen(dev, 0, S_IFBLK, curproc) != 0)
return -1;
if (lp->d_partitions[part].p_fstype != FS_SWAP)
size = -1;
else
size = lp->d_partitions[part].p_size *
(lp->d_secsize / DEV_BSIZE);
if (omask == 0 && ofdclose(dev, 0, S_IFBLK, curproc) != 0)
return -1;
return size;
}