263 lines
7.6 KiB
C
263 lines
7.6 KiB
C
/* $NetBSD: ata_raid_via.c,v 1.6 2008/09/19 16:49:27 christos Exp $ */
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/*-
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* Copyright (c) 2000,2001,2002 Søren Schmidt <sos@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
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* without modification, immediately at the beginning of the file.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Support for parsing VIA V-RAID ATA RAID controller configuration blocks.
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*
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* Adapted to NetBSD by Tim Rightnour (garbled@netbsd.org)
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ata_raid_via.c,v 1.6 2008/09/19 16:49:27 christos Exp $");
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#include <sys/param.h>
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#include <sys/buf.h>
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#include <sys/bufq.h>
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#include <sys/conf.h>
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#include <sys/device.h>
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#include <sys/disk.h>
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#include <sys/disklabel.h>
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#include <sys/fcntl.h>
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#include <sys/malloc.h>
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#include <sys/vnode.h>
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#include <sys/kauth.h>
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#include <miscfs/specfs/specdev.h>
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#include <dev/ata/atareg.h>
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#include <dev/ata/atavar.h>
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#include <dev/ata/wdvar.h>
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#include <dev/ata/ata_raidreg.h>
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#include <dev/ata/ata_raidvar.h>
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#ifdef ATA_RAID_DEBUG
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#define DPRINTF(x) printf x
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#else
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#define DPRINTF(x) /* nothing */
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#endif
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#ifdef ATA_RAID_DEBUG
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static const char *
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ata_raid_via_type(int type)
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{
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static char buffer[16];
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switch (type) {
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case VIA_T_RAID0: return "RAID0";
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case VIA_T_RAID1: return "RAID1";
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case VIA_T_RAID5: return "RAID5";
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case VIA_T_RAID01: return "RAID0+1";
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case VIA_T_SPAN: return "SPAN";
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default:
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sprintf(buffer, "UNKNOWN 0x%02x", type);
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return buffer;
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}
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}
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static void
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ata_raid_via_print_info(struct via_raid_conf *info)
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{
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int i;
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printf("*************** ATA VIA Metadata ****************\n");
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printf("magic 0x%02x\n", info->magic);
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printf("dummy_0 0x%02x\n", info->dummy_0);
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printf("type %s\n",
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ata_raid_via_type(info->type & VIA_T_MASK));
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printf("bootable %d\n", info->type & VIA_T_BOOTABLE);
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printf("unknown %d\n", info->type & VIA_T_UNKNOWN);
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printf("disk_index 0x%02x\n", info->disk_index);
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printf("stripe_layout 0x%02x\n", info->stripe_layout);
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printf(" stripe_disks %d\n", info->stripe_layout & VIA_L_DISKS);
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printf(" stripe_sectors %d\n",
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0x08 << ((info->stripe_layout & VIA_L_MASK) >> VIA_L_SHIFT));
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printf("disk_sectors %ju\n", info->disk_sectors);
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printf("disk_id 0x%08x\n", info->disk_id);
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printf("DISK# disk_id\n");
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for (i = 0; i < 8; i++) {
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if (info->disks[i])
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printf(" %d 0x%08x\n", i, info->disks[i]);
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}
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printf("checksum 0x%02x\n", info->checksum);
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printf("=================================================\n");
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}
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#endif
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int
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ata_raid_read_config_via(struct wd_softc *sc)
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{
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struct via_raid_conf *info;
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struct atabus_softc *atabus;
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struct vnode *vp;
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int bmajor, error;
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dev_t dev;
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uint32_t drive;
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uint8_t checksum, checksum_alt, byte3, *ptr;
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int count, disk;
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struct ataraid_array_info *aai;
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struct ataraid_disk_info *adi;
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info = malloc(sizeof(*info), M_DEVBUF, M_WAITOK);
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bmajor = devsw_name2blk(device_xname(sc->sc_dev), NULL, 0);
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/* Get a vnode for the raw partition of this disk. */
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dev = MAKEDISKDEV(bmajor, device_unit(sc->sc_dev), RAW_PART);
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error = bdevvp(dev, &vp);
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if (error)
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goto out;
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error = VOP_OPEN(vp, FREAD, NOCRED);
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if (error) {
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vput(vp);
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goto out;
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}
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error = ata_raid_config_block_rw(vp, VIA_LBA(sc), info,
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sizeof(*info), B_READ);
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VOP_CLOSE(vp, FREAD, NOCRED);
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vput(vp);
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if (error) {
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aprint_error_dev(sc->sc_dev,
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"error %d reading VIA V-RAID config block\n", error);
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goto out;
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}
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#ifdef ATA_RAID_DEBUG
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ata_raid_via_print_info(info);
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printf("MAGIC == 0x%02x\n", info->magic);
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#endif
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/* Check the signature. */
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if (info->magic != VIA_MAGIC) {
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DPRINTF(("%s: VIA V-RAID signature check failed\n",
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device_xname(sc->sc_dev)));
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error = ESRCH;
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goto out;
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}
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/* calculate checksum and compare for valid */
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for (byte3 = 0, checksum = 0, ptr = (uint8_t *)info, count = 0;
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count < 50; count++)
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if (count == 3)
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byte3 = *ptr++;
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else
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checksum += *ptr++;
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checksum_alt = checksum + (byte3 & ~VIA_T_BOOTABLE);
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checksum += byte3;
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if (checksum != info->checksum && checksum_alt != info->checksum) {
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DPRINTF(("%s: VIA V-RAID checksum failed 0x%02x != "
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"0x%02x or 0x%02x\n", device_xname(sc->sc_dev),
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info->checksum, checksum, checksum_alt));
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error = ESRCH;
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goto out;
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}
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/*
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* Lookup or allocate a new array info structure for
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* this array. Use the serial number of disk0 as the array#
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*/
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aai = ata_raid_get_array_info(ATA_RAID_TYPE_VIA, info->disks[0]);
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aai->aai_status = AAI_S_READY;
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switch (info->type & VIA_T_MASK) {
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case VIA_T_RAID0:
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aai->aai_level = AAI_L_RAID0;
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aai->aai_width = info->stripe_layout & VIA_L_DISKS;
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aai->aai_capacity = aai->aai_width * info->disk_sectors;
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break;
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case VIA_T_RAID1:
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aai->aai_level = AAI_L_RAID1;
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aai->aai_width = 1;
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aai->aai_capacity = aai->aai_width * info->disk_sectors;
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break;
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case VIA_T_RAID5:
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aai->aai_level = AAI_L_RAID5;
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aai->aai_width = info->stripe_layout & VIA_L_DISKS;
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aai->aai_capacity = (aai->aai_width - 1) * info->disk_sectors;
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break;
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case VIA_T_SPAN:
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aai->aai_level = AAI_L_SPAN;
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aai->aai_width = 1;
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aai->aai_capacity += info->disk_sectors; /* XXX ??? */
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break;
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default:
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aprint_error_dev(sc->sc_dev,
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"unknown VIA V-RAID type 0x%02x\n", info->type);
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error = EINVAL;
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goto out;
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}
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aai->aai_type = ATA_RAID_TYPE_VIA;
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for (count = 0, disk = 0; disk < 8; disk++)
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if (info->disks[disk])
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count++;
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aai->aai_interleave =
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0x08 << ((info->stripe_layout & VIA_L_MASK) >> VIA_L_SHIFT);
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aai->aai_ndisks = count;
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aai->aai_heads = 255;
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aai->aai_sectors = 63;
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aai->aai_cylinders = aai->aai_capacity / (63 * 255);
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aai->aai_offset = 0;
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aai->aai_reserved = 1;
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/* XXX - bogus. RAID1 shouldn't really have an interleave */
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if (aai->aai_interleave == 0)
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aai->aai_interleave = aai->aai_capacity;
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atabus = device_private(device_parent(sc->sc_dev));
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drive = atabus->sc_chan->ch_channel;
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if (drive >= aai->aai_ndisks) {
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aprint_error_dev(sc->sc_dev,
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"drive number %d doesn't make sense within %d-disk "
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"array\n", drive, aai->aai_ndisks);
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error = EINVAL;
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goto out;
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}
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adi = &aai->aai_disks[drive];
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adi->adi_dev = sc->sc_dev;
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adi->adi_status = ADI_S_ONLINE | ADI_S_ASSIGNED;
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adi->adi_sectors = aai->aai_capacity;
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adi->adi_compsize = info->disk_sectors;
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error = 0;
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out:
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free(info, M_DEVBUF);
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return (error);
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}
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