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/* $OpenBSD: diskprobe.c,v 1.16 1999/05/20 12:56:40 aaron Exp $ */
/*
* Copyright (c) 1997 Tobias Weingartner
* 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 Tobias Weingartner.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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.
*
*/
/* We want the disk type names from disklabel.h */
#define DKTYPENAMES
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/reboot.h>
#include <sys/disklabel.h>
#include <stand/boot/bootarg.h>
#include <machine/biosvar.h>
#include <lib/libz/zlib.h>
#include "disk.h"
#include "biosdev.h"
#include "libsa.h"
#define MAX_CKSUMLEN MAXBSIZE / DEV_BSIZE /* Max # of blks to cksum */
/* Local Prototypes */
static int disksum __P((int));
/* List of disk devices we found/probed */
struct disklist_lh disklist;
/* Pointer to boot device */
struct diskinfo *bootdev_dip;
extern int debug;
/* Probe for all BIOS floppies */
static void
floppyprobe()
{
struct diskinfo *dip;
int i;
/* Floppies */
for(i = 0; i < 4; i++) {
dip = alloc(sizeof(struct diskinfo));
bzero(dip, sizeof(*dip));
if(bios_getdiskinfo(i, &dip->bios_info)) {
#ifdef BIOS_DEBUG
if (debug)
printf(" <!fd%u>", i);
#endif
free(dip, 0);
break;
}
printf(" fd%u", i);
/* Fill out best we can - (fd?) */
dip->bios_info.bsd_dev = MAKEBOOTDEV(2, 0, 0, i, RAW_PART);
if((bios_getdisklabel(&dip->bios_info, &dip->disklabel)) != 0)
dip->bios_info.flags |= BDI_BADLABEL;
else
dip->bios_info.flags |= BDI_GOODLABEL;
/* Add to queue of disks */
TAILQ_INSERT_TAIL(&disklist, dip, list);
}
}
/* Probe for all BIOS hard disks */
static void
hardprobe()
{
struct diskinfo *dip;
int i;
u_int bsdunit, type;
u_int scsi = 0, ide = 0;
/* Hard disks */
for(i = 0x80; i < 0x88; i++) {
dip = alloc(sizeof(struct diskinfo));
if(bios_getdiskinfo(i, &dip->bios_info)) {
#ifdef BIOS_DEBUG
if (debug)
printf(" <!hd%u>", i&0x7f);
#endif
free(dip, 0);
break;
}
printf(" hd%u%s", i&0x7f, (dip->bios_info.bios_edd > 0?"+":""));
/* Try to find the label, to figure out device type */
if((bios_getdisklabel(&dip->bios_info, &dip->disklabel)) ) {
printf("*");
bsdunit = ide++;
type = 0; /* XXX let it be IDE */
} else {
/* Best guess */
switch (dip->disklabel.d_type) {
case DTYPE_SCSI:
type = 4;
bsdunit = scsi++;
dip->bios_info.flags |= BDI_GOODLABEL;
break;
case DTYPE_ESDI:
case DTYPE_ST506:
type = 0;
bsdunit = ide++;
dip->bios_info.flags |= BDI_GOODLABEL;
break;
default:
dip->bios_info.flags |= BDI_BADLABEL;
type = 0; /* XXX Suggest IDE */
bsdunit = ide++;
}
}
dip->bios_info.checksum = 0; /* just in case */
/* Fill out best we can */
dip->bios_info.bsd_dev = MAKEBOOTDEV(type, 0, 0, bsdunit, RAW_PART);
/* Add to queue of disks */
TAILQ_INSERT_TAIL(&disklist, dip, list);
}
}
/* Probe for all BIOS supported disks */
u_int32_t bios_cksumlen;
void
diskprobe()
{
struct diskinfo *dip;
int i;
/* These get passed to kernel */
bios_diskinfo_t *bios_diskinfo;
/* Init stuff */
printf("disk:");
TAILQ_INIT(&disklist);
/* Do probes */
floppyprobe();
#ifdef BIOS_DEBUG
if (debug)
printf(";");
#endif
hardprobe();
/* Checksumming of hard disks */
for (i = 0; disksum(i++) && i < MAX_CKSUMLEN; )
;
bios_cksumlen = i;
/* Get space for passing bios_diskinfo stuff to kernel */
for(i = 0, dip = TAILQ_FIRST(&disklist); dip; dip = TAILQ_NEXT(dip, list))
i++;
bios_diskinfo = alloc(++i * sizeof(bios_diskinfo_t));
/* Copy out the bios_diskinfo stuff */
for(i = 0, dip = TAILQ_FIRST(&disklist); dip; dip = TAILQ_NEXT(dip, list))
bios_diskinfo[i++] = dip->bios_info;
bios_diskinfo[i++].bios_number = -1;
/* Register for kernel use */
addbootarg(BOOTARG_CKSUMLEN, sizeof(u_int32_t), &bios_cksumlen);
addbootarg(BOOTARG_DISKINFO, i * sizeof(bios_diskinfo_t), bios_diskinfo);
printf("\n");
}
/* Find info on given BIOS disk */
struct diskinfo *
dklookup(dev)
int dev;
{
struct diskinfo *dip;
for(dip = TAILQ_FIRST(&disklist); dip; dip = TAILQ_NEXT(dip, list))
if(dip->bios_info.bios_number == dev)
return(dip);
return(NULL);
}
void
dump_diskinfo()
{
struct diskinfo *dip;
(void)fstypenames, (void)fstypesnames;
printf("Disk\tBIOS#\tType\tCyls\tHeads\tSecs\tFlags\tChecksum\n");
for(dip = TAILQ_FIRST(&disklist); dip; dip = TAILQ_NEXT(dip, list)){
bios_diskinfo_t *bdi = &dip->bios_info;
int d = bdi->bios_number;
printf("%cd%d\t0x%x\t%s\t%d\t%d\t%d\t0x%x\t0x%x\n",
(d & 0x80)?'h':'f', d & 0x7F, d,
(bdi->flags & BDI_BADLABEL)?"*none*":
dktypenames[B_TYPE(dip->disklabel.d_type)],
bdi->bios_cylinders, bdi->bios_heads, bdi->bios_sectors,
bdi->flags, bdi->checksum);
}
}
/* Find BIOS portion on given BIOS disk
* XXX - Use dklookup() instead.
*/
bios_diskinfo_t *
bios_dklookup(dev)
register int dev;
{
struct diskinfo *dip;
dip = dklookup(dev);
if(dip)
return(&dip->bios_info);
return(NULL);
}
/*
* Checksum one more block on all harddrives
*
* Use the adler32() function from libz,
* as it is quick, small, and available.
*/
int
disksum(blk)
int blk;
{
struct diskinfo *dip, *dip2;
int st, reprobe = 0;
int hpc, spt, dev;
char *buf;
int cyl, head, sect;
buf = alloca(DEV_BSIZE);
for(dip = TAILQ_FIRST(&disklist); dip; dip = TAILQ_NEXT(dip, list)){
bios_diskinfo_t *bdi = &dip->bios_info;
/* Skip this disk if it is not a HD or has had an I/O error */
if (!(bdi->bios_number & 0x80) || bdi->flags & BDI_INVALID)
continue;
dev = bdi->bios_number;
hpc = bdi->bios_heads;
spt = bdi->bios_sectors;
/* Adler32 checksum */
btochs(blk, cyl, head, sect, hpc, spt);
st = biosd_io(F_READ, dev, cyl, head, sect, 1, buf);
if (st) {
bdi->flags |= BDI_INVALID;
continue;
}
bdi->checksum = adler32(bdi->checksum, buf, DEV_BSIZE);
for(dip2 = TAILQ_FIRST(&disklist); dip2 != dip;
dip2 = TAILQ_NEXT(dip2, list)){
bios_diskinfo_t *bd = &dip2->bios_info;
if ((bd->bios_number & 0x80) &&
!(bd->flags & BDI_INVALID) &&
bdi->checksum == bd->checksum)
reprobe = 1;
}
}
return (reprobe);
}
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