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NetBSD/sys/dev/ata/ata_raid_via.c

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/* $NetBSD: ata_raid_via.c,v 1.7 2014/03/25 16:19:13 christos Exp $ */
/*-
* Copyright (c) 2000,2001,2002 Søren Schmidt <sos@FreeBSD.org>
* 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,
* without modification, immediately at the beginning of the file.
* 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. 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 AUTHOR 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.
*/
/*
* Support for parsing VIA V-RAID ATA RAID controller configuration blocks.
*
* Adapted to NetBSD by Tim Rightnour (garbled@netbsd.org)
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ata_raid_via.c,v 1.7 2014/03/25 16:19:13 christos Exp $");
#include <sys/param.h>
#include <sys/buf.h>
#include <sys/bufq.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/disk.h>
#include <sys/disklabel.h>
#include <sys/fcntl.h>
#include <sys/malloc.h>
#include <sys/vnode.h>
#include <sys/kauth.h>
#include <miscfs/specfs/specdev.h>
#include <dev/ata/atareg.h>
#include <dev/ata/atavar.h>
#include <dev/ata/wdvar.h>
#include <dev/ata/ata_raidreg.h>
#include <dev/ata/ata_raidvar.h>
#ifdef ATA_RAID_DEBUG
#define DPRINTF(x) printf x
#else
#define DPRINTF(x) /* nothing */
#endif
#ifdef ATA_RAID_DEBUG
static const char *
ata_raid_via_type(int type)
{
static char buffer[16];
switch (type) {
case VIA_T_RAID0: return "RAID0";
case VIA_T_RAID1: return "RAID1";
case VIA_T_RAID5: return "RAID5";
case VIA_T_RAID01: return "RAID0+1";
case VIA_T_SPAN: return "SPAN";
default:
snprintf(buffer, sizeof(buffer), "UNKNOWN 0x%02x", type);
return buffer;
}
}
static void
ata_raid_via_print_info(struct via_raid_conf *info)
{
int i;
printf("*************** ATA VIA Metadata ****************\n");
printf("magic 0x%02x\n", info->magic);
printf("dummy_0 0x%02x\n", info->dummy_0);
printf("type %s\n",
ata_raid_via_type(info->type & VIA_T_MASK));
printf("bootable %d\n", info->type & VIA_T_BOOTABLE);
printf("unknown %d\n", info->type & VIA_T_UNKNOWN);
printf("disk_index 0x%02x\n", info->disk_index);
printf("stripe_layout 0x%02x\n", info->stripe_layout);
printf(" stripe_disks %d\n", info->stripe_layout & VIA_L_DISKS);
printf(" stripe_sectors %d\n",
0x08 << ((info->stripe_layout & VIA_L_MASK) >> VIA_L_SHIFT));
printf("disk_sectors %ju\n", info->disk_sectors);
printf("disk_id 0x%08x\n", info->disk_id);
printf("DISK# disk_id\n");
for (i = 0; i < 8; i++) {
if (info->disks[i])
printf(" %d 0x%08x\n", i, info->disks[i]);
}
printf("checksum 0x%02x\n", info->checksum);
printf("=================================================\n");
}
#endif
int
ata_raid_read_config_via(struct wd_softc *sc)
{
struct via_raid_conf *info;
struct atabus_softc *atabus;
struct vnode *vp;
int bmajor, error;
dev_t dev;
uint32_t drive;
uint8_t checksum, checksum_alt, byte3, *ptr;
int count, disk;
struct ataraid_array_info *aai;
struct ataraid_disk_info *adi;
info = malloc(sizeof(*info), M_DEVBUF, M_WAITOK);
bmajor = devsw_name2blk(device_xname(sc->sc_dev), NULL, 0);
/* Get a vnode for the raw partition of this disk. */
dev = MAKEDISKDEV(bmajor, device_unit(sc->sc_dev), RAW_PART);
error = bdevvp(dev, &vp);
if (error)
goto out;
error = VOP_OPEN(vp, FREAD, NOCRED);
if (error) {
vput(vp);
goto out;
}
error = ata_raid_config_block_rw(vp, VIA_LBA(sc), info,
sizeof(*info), B_READ);
VOP_CLOSE(vp, FREAD, NOCRED);
vput(vp);
if (error) {
aprint_error_dev(sc->sc_dev,
"error %d reading VIA V-RAID config block\n", error);
goto out;
}
#ifdef ATA_RAID_DEBUG
ata_raid_via_print_info(info);
printf("MAGIC == 0x%02x\n", info->magic);
#endif
/* Check the signature. */
if (info->magic != VIA_MAGIC) {
DPRINTF(("%s: VIA V-RAID signature check failed\n",
device_xname(sc->sc_dev)));
error = ESRCH;
goto out;
}
/* calculate checksum and compare for valid */
for (byte3 = 0, checksum = 0, ptr = (uint8_t *)info, count = 0;
count < 50; count++)
if (count == 3)
byte3 = *ptr++;
else
checksum += *ptr++;
checksum_alt = checksum + (byte3 & ~VIA_T_BOOTABLE);
checksum += byte3;
if (checksum != info->checksum && checksum_alt != info->checksum) {
DPRINTF(("%s: VIA V-RAID checksum failed 0x%02x != "
"0x%02x or 0x%02x\n", device_xname(sc->sc_dev),
info->checksum, checksum, checksum_alt));
error = ESRCH;
goto out;
}
/*
* Lookup or allocate a new array info structure for
* this array. Use the serial number of disk0 as the array#
*/
aai = ata_raid_get_array_info(ATA_RAID_TYPE_VIA, info->disks[0]);
aai->aai_status = AAI_S_READY;
switch (info->type & VIA_T_MASK) {
case VIA_T_RAID0:
aai->aai_level = AAI_L_RAID0;
aai->aai_width = info->stripe_layout & VIA_L_DISKS;
aai->aai_capacity = aai->aai_width * info->disk_sectors;
break;
case VIA_T_RAID1:
aai->aai_level = AAI_L_RAID1;
aai->aai_width = 1;
aai->aai_capacity = aai->aai_width * info->disk_sectors;
break;
case VIA_T_RAID5:
aai->aai_level = AAI_L_RAID5;
aai->aai_width = info->stripe_layout & VIA_L_DISKS;
aai->aai_capacity = (aai->aai_width - 1) * info->disk_sectors;
break;
case VIA_T_SPAN:
aai->aai_level = AAI_L_SPAN;
aai->aai_width = 1;
aai->aai_capacity += info->disk_sectors; /* XXX ??? */
break;
default:
aprint_error_dev(sc->sc_dev,
"unknown VIA V-RAID type 0x%02x\n", info->type);
error = EINVAL;
goto out;
}
aai->aai_type = ATA_RAID_TYPE_VIA;
for (count = 0, disk = 0; disk < 8; disk++)
if (info->disks[disk])
count++;
aai->aai_interleave =
0x08 << ((info->stripe_layout & VIA_L_MASK) >> VIA_L_SHIFT);
aai->aai_ndisks = count;
aai->aai_heads = 255;
aai->aai_sectors = 63;
aai->aai_cylinders = aai->aai_capacity / (63 * 255);
aai->aai_offset = 0;
aai->aai_reserved = 1;
/* XXX - bogus. RAID1 shouldn't really have an interleave */
if (aai->aai_interleave == 0)
aai->aai_interleave = aai->aai_capacity;
atabus = device_private(device_parent(sc->sc_dev));
drive = atabus->sc_chan->ch_channel;
if (drive >= aai->aai_ndisks) {
aprint_error_dev(sc->sc_dev,
"drive number %d doesn't make sense within %d-disk "
"array\n", drive, aai->aai_ndisks);
error = EINVAL;
goto out;
}
adi = &aai->aai_disks[drive];
adi->adi_dev = sc->sc_dev;
adi->adi_status = ADI_S_ONLINE | ADI_S_ASSIGNED;
adi->adi_sectors = aai->aai_capacity;
adi->adi_compsize = info->disk_sectors;
error = 0;
out:
free(info, M_DEVBUF);
return (error);
}
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