NetBSD-5.0.2/sys/dev/ofw/ofdisk.c
/* $NetBSD: ofdisk.c,v 1.41 2008/06/12 22:28:26 cegger 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ofdisk.c,v 1.41 2008/06/12 22:28:26 cegger Exp $");
#include <sys/param.h>
#include <sys/buf.h>
#include <sys/device.h>
#include <sys/conf.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 ofdisk_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;
};
/* sc_flags */
#define OFDF_ISFLOPPY 0x01 /* we are a floppy drive */
#define OFDISK_FLOPPY_P(of) ((of)->sc_flags & OFDF_ISFLOPPY)
static int ofdisk_match (struct device *, struct cfdata *, void *);
static void ofdisk_attach (struct device *, struct device *, void *);
CFATTACH_DECL(ofdisk, sizeof(struct ofdisk_softc),
ofdisk_match, ofdisk_attach, NULL, NULL);
extern struct cfdriver ofdisk_cd;
dev_type_open(ofdisk_open);
dev_type_close(ofdisk_close);
dev_type_read(ofdisk_read);
dev_type_write(ofdisk_write);
dev_type_ioctl(ofdisk_ioctl);
dev_type_strategy(ofdisk_strategy);
dev_type_dump(ofdisk_dump);
dev_type_size(ofdisk_size);
const struct bdevsw ofdisk_bdevsw = {
ofdisk_open, ofdisk_close, ofdisk_strategy, ofdisk_ioctl,
ofdisk_dump, ofdisk_size, D_DISK
};
const struct cdevsw ofdisk_cdevsw = {
ofdisk_open, ofdisk_close, ofdisk_read, ofdisk_write, ofdisk_ioctl,
nostop, notty, nopoll, nommap, nokqfilter, D_DISK
};
static void ofminphys(struct buf *);
struct dkdriver ofdisk_dkdriver = { ofdisk_strategy, ofminphys };
void ofdisk_getdefaultlabel (struct ofdisk_softc *, struct disklabel *);
void ofdisk_getdisklabel (dev_t);
static int
ofdisk_match(struct device *parent, struct cfdata *match, void *aux)
{
struct ofbus_attach_args *oba = aux;
char type[8];
int l;
if (strcmp(oba->oba_busname, "ofw"))
return (0);
if ((l = OF_getprop(oba->oba_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
ofdisk_attach(struct device *parent, struct device *self, void *aux)
{
struct ofdisk_softc *of = device_private(self);
struct ofbus_attach_args *oba = aux;
char child[64];
int l;
if ((l = OF_getprop(oba->oba_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 = oba->oba_phandle;
of->sc_unit = oba->oba_unit;
of->sc_ihandle = 0;
disk_init(&of->sc_dk, device_xname(&of->sc_dev), &ofdisk_dkdriver);
disk_attach(&of->sc_dk);
printf("\n");
if (strcmp(child, "floppy") == 0)
of->sc_flags |= OFDF_ISFLOPPY;
else {
/* Discover wedges on this disk. */
dkwedge_discover(&of->sc_dk);
}
}
int
ofdisk_open(dev_t dev, int flags, int fmt, struct lwp *lwp)
{
struct ofdisk_softc *of;
char path[256];
int error, l, part;
of = device_lookup_private(&ofdisk_cd, DISKUNIT(dev));
if (of == NULL)
return ENXIO;
part = DISKPART(dev);
mutex_enter(&of->sc_dk.dk_openlock);
/*
* If there are wedges, and this is not RAW_PART, then we
* need to fail.
*/
if (of->sc_dk.dk_nwedges != 0 && part != RAW_PART) {
error = EBUSY;
goto bad1;
}
if (!of->sc_ihandle) {
if ((l = OF_package_to_path(of->sc_phandle, path,
sizeof path - 3)) < 0 ||
l >= sizeof path - 3) {
error = ENXIO;
goto bad1;
}
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;
}
strlcat(path, ":0", sizeof(path));
if ((of->sc_ihandle = OF_open(path)) == -1) {
error = ENXIO;
goto bad1;
}
/*
* 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;
ofdisk_getdisklabel(dev);
}
switch (fmt) {
case S_IFCHR:
of->sc_dk.dk_copenmask |= 1 << part;
break;
case S_IFBLK:
of->sc_dk.dk_bopenmask |= 1 << part;
break;
}
of->sc_dk.dk_openmask =
of->sc_dk.dk_copenmask | of->sc_dk.dk_bopenmask;
error = 0;
bad1:
mutex_exit(&of->sc_dk.dk_openlock);
return (error);
}
int
ofdisk_close(dev_t dev, int flags, int fmt, struct lwp *l)
{
struct ofdisk_softc *of =
device_lookup_private(&ofdisk_cd, DISKUNIT(dev));
mutex_enter(&of->sc_dk.dk_openlock);
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;
}
mutex_exit(&of->sc_dk.dk_openlock);
return 0;
}
void
ofdisk_strategy(struct buf *bp)
{
struct ofdisk_softc *of =
device_lookup_private(&ofdisk_cd, 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 :
(int(*)(int, void*, int))OF_write;
if (DISKPART(bp->b_dev) != RAW_PART) {
if (bounds_check_with_label(&of->sc_dk, bp, 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_resid = bp->b_bcount;
} else
bp->b_resid = bp->b_bcount - read;
disk_unbusy(&of->sc_dk, bp->b_bcount - bp->b_resid,
(bp->b_flags & B_READ));
done:
biodone(bp);
}
static void
ofminphys(struct buf *bp)
{
struct ofdisk_softc *of =
device_lookup_private(&ofdisk_cd, DISKUNIT(bp->b_dev));
if (bp->b_bcount > of->max_transfer)
bp->b_bcount = of->max_transfer;
}
int
ofdisk_read(dev_t dev, struct uio *uio, int flags)
{
return physio(ofdisk_strategy, NULL, dev, B_READ, ofminphys, uio);
}
int
ofdisk_write(dev_t dev, struct uio *uio, int flags)
{
return physio(ofdisk_strategy, NULL, dev, B_WRITE, ofminphys, uio);
}
int
ofdisk_ioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
{
struct ofdisk_softc *of =
device_lookup_private(&ofdisk_cd, DISKUNIT(dev));
int error;
#ifdef __HAVE_OLD_DISKLABEL
struct disklabel newlabel;
#endif
switch (cmd) {
case DIOCGDINFO:
*(struct disklabel *)data = *of->sc_dk.dk_label;
return 0;
#ifdef __HAVE_OLD_DISKLABEL
case ODIOCGDINFO:
newlabel = *of->sc_dk.dk_label;
if (newlabel.d_npartitions > OLDMAXPARTITIONS)
return ENOTTY;
memcpy(data, &newlabel, sizeof (struct olddisklabel));
return 0;
#endif
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:
#ifdef __HAVE_OLD_DISKLABEL
case ODIOCWDINFO:
case ODIOCSDINFO:
#endif
{
struct disklabel *lp;
#ifdef __HAVE_OLD_DISKLABEL
if (cmd == ODIOCSDINFO || cmd == ODIOCWDINFO) {
memset(&newlabel, 0, sizeof newlabel);
memcpy(&newlabel, data, sizeof (struct olddisklabel));
lp = &newlabel;
} else
#endif
lp = (struct disklabel *)data;
if ((flag & FWRITE) == 0)
return EBADF;
mutex_enter(&of->sc_dk.dk_openlock);
error = setdisklabel(of->sc_dk.dk_label,
lp, /*of->sc_dk.dk_openmask */0,
of->sc_dk.dk_cpulabel);
if (error == 0 && cmd == DIOCWDINFO
#ifdef __HAVE_OLD_DISKLABEL
|| xfer == ODIOCWDINFO
#endif
)
error = writedisklabel(MAKEDISKDEV(major(dev),
DISKUNIT(dev), RAW_PART), ofdisk_strategy,
of->sc_dk.dk_label, of->sc_dk.dk_cpulabel);
mutex_exit(&of->sc_dk.dk_openlock);
return error;
}
case DIOCGDEFLABEL:
ofdisk_getdefaultlabel(of, (struct disklabel *)data);
return 0;
#ifdef __HAVE_OLD_DISKLABEL
case DIOCGDEFLABEL:
ofdisk_getdefaultlabel(of, &newlabel);
if (newlabel.d_npartitions > OLDMAXPARTITIONS)
return ENOTTY;
memcpy(data, &newlabel, sizeof (struct olddisklabel));
return 0;
#endif
case DIOCAWEDGE:
{
struct dkwedge_info *dkw = (void *) data;
if (OFDISK_FLOPPY_P(of))
return (ENOTTY);
if ((flag & FWRITE) == 0)
return (EBADF);
/* If the ioctl happens here, the parent is us. */
strlcpy(dkw->dkw_parent, device_xname(&of->sc_dev),
sizeof(dkw->dkw_parent));
return (dkwedge_add(dkw));
}
case DIOCDWEDGE:
{
struct dkwedge_info *dkw = (void *) data;
if (OFDISK_FLOPPY_P(of))
return (ENOTTY);
if ((flag & FWRITE) == 0)
return (EBADF);
/* If the ioctl happens here, the parent is us. */
strlcpy(dkw->dkw_parent, device_xname(&of->sc_dev),
sizeof(dkw->dkw_parent));
return (dkwedge_del(dkw));
}
case DIOCLWEDGES:
{
struct dkwedge_list *dkwl = (void *) data;
if (OFDISK_FLOPPY_P(of))
return (ENOTTY);
return (dkwedge_list(&of->sc_dk, dkwl, l));
}
default:
return ENOTTY;
}
}
int
ofdisk_dump(dev_t dev, daddr_t blkno, void *va, size_t size)
{
return EINVAL;
}
int
ofdisk_size(dev_t dev)
{
struct ofdisk_softc *of;
struct disklabel *lp;
int size, part, omask;
of = device_lookup_private(&ofdisk_cd, DISKUNIT(dev));
if (of == NULL)
return ENXIO;
part = DISKPART(dev);
omask = of->sc_dk.dk_openmask & (1 << part);
lp = of->sc_dk.dk_label;
if (omask == 0 && ofdisk_open(dev, 0, S_IFBLK, curlwp) != 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 && ofdisk_close(dev, 0, S_IFBLK, curlwp) != 0)
return -1;
return size;
}
void
ofdisk_getdefaultlabel(struct ofdisk_softc *of, struct disklabel *lp)
{
memset(lp, 0, sizeof *lp);
/*
* XXX Firmware bug? Asking for block size gives a
* XXX ridiculous 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;
lp->d_magic = DISKMAGIC;
lp->d_magic2 = DISKMAGIC;
lp->d_checksum = dkcksum(lp);
}
void
ofdisk_getdisklabel(dev_t dev)
{
int unit = DISKUNIT(dev);
struct ofdisk_softc *of =
device_lookup_private(&ofdisk_cd, unit);
struct disklabel *lp = of->sc_dk.dk_label;
const char *errmes;
int l;
ofdisk_getdefaultlabel(of, lp);
/*
* 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 (OFDISK_FLOPPY_P(of)) {
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];
}
lp->d_checksum = dkcksum(lp);
} else {
errmes = readdisklabel(MAKEDISKDEV(major(dev),
unit, RAW_PART), ofdisk_strategy, lp,
of->sc_dk.dk_cpulabel);
if (errmes != NULL)
printf("%s: %s\n", device_xname(&of->sc_dev), errmes);
}
}