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NetBSD/sys/dev/ata/ata_raid_promise.c

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/* $NetBSD: ata_raid_promise.c,v 1.11 2008/03/18 20:46:36 cube 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 Promise ATA RAID controller configuration blocks.
*
* Adapted to NetBSD by Jason R. Thorpe of Wasabi Systems, Inc.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ata_raid_promise.c,v 1.11 2008/03/18 20:46:36 cube 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
int
ata_raid_read_config_promise(struct wd_softc *sc)
{
struct promise_raid_conf *info;
struct vnode *vp;
int bmajor, error, count;
u_int disk;
dev_t dev;
uint32_t cksum, *ckptr;
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, PR_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 Promise config block\n", error);
goto out;
}
/* Check the signature. */
if (strncmp(info->promise_id, PR_MAGIC, sizeof(PR_MAGIC)) != 0) {
DPRINTF(("%s: Promise signature check failed\n",
device_xname(sc->sc_dev)));
error = ESRCH;
goto out;
}
/* Verify the checksum. */
for (cksum = 0, ckptr = (uint32_t *) info, count = 0; count < 511;
count++)
cksum += *ckptr++;
if (cksum != *ckptr) {
DPRINTF(("%s: Promise checksum failed\n",
device_xname(sc->sc_dev)));
error = ESRCH;
goto out;
}
if (info->raid.integrity != PR_I_VALID) {
DPRINTF(("%s: Promise config block marked invalid\n",
device_xname(sc->sc_dev)));
error = ESRCH;
goto out;
}
/*
* Lookup or allocate a new array info structure for
* this array.
*/
aai = ata_raid_get_array_info(ATA_RAID_TYPE_PROMISE,
info->raid.array_number);
if (info->raid.generation == 0 ||
info->raid.generation > aai->aai_generation) {
aai->aai_generation = info->raid.generation;
/* aai_type and aai_arrayno filled in already */
if ((info->raid.status &
(PR_S_VALID | PR_S_ONLINE | PR_S_INITED | PR_S_READY)) ==
(PR_S_VALID | PR_S_ONLINE | PR_S_INITED | PR_S_READY)) {
aai->aai_status |= AAI_S_READY;
if (info->raid.status & PR_S_DEGRADED)
aai->aai_status |= AAI_S_DEGRADED;
} else
aai->aai_status &= ~AAI_S_READY;
switch (info->raid.type) {
case PR_T_RAID0:
aai->aai_level = AAI_L_RAID0;
break;
case PR_T_RAID1:
aai->aai_level = AAI_L_RAID1;
if (info->raid.array_width > 1)
aai->aai_level |= AAI_L_RAID0;
break;
case PR_T_SPAN:
aai->aai_level = AAI_L_SPAN;
break;
default:
aprint_error_dev(sc->sc_dev,
"unknown Promise RAID type 0x%02x\n",
info->raid.type);
error = EINVAL;
goto out;
}
aai->aai_interleave = 1U << info->raid.stripe_shift;
aai->aai_width = info->raid.array_width;
aai->aai_ndisks = info->raid.total_disks;
aai->aai_heads = info->raid.heads + 1;
aai->aai_sectors = info->raid.sectors;
aai->aai_cylinders = info->raid.cylinders + 1;
aai->aai_capacity = info->raid.total_sectors;
aai->aai_offset = 0;
aai->aai_reserved = 63;
for (disk = 0; disk < aai->aai_ndisks; disk++) {
adi = &aai->aai_disks[disk];
adi->adi_status = 0;
if (info->raid.disk[disk].flags & PR_F_ONLINE)
adi->adi_status |= ADI_S_ONLINE;
if (info->raid.disk[disk].flags & PR_F_ASSIGNED)
adi->adi_status |= ADI_S_ASSIGNED;
if (info->raid.disk[disk].flags & PR_F_SPARE) {
adi->adi_status &= ~ADI_S_ONLINE;
adi->adi_status |= ADI_S_SPARE;
}
if (info->raid.disk[disk].flags &
(PR_F_REDIR | PR_F_DOWN))
adi->adi_status &= ~ADI_S_ONLINE;
}
}
adi = &aai->aai_disks[info->raid.disk_number];
if (adi->adi_status) {
adi->adi_dev = sc->sc_dev;
adi->adi_sectors = info->raid.disk_sectors;
adi->adi_compsize = sc->sc_capacity - aai->aai_reserved;
}
error = 0;
out:
free(info, M_DEVBUF);
return (error);
}
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