3381232270
Such RAID controllers are actually just IDE controllers with a BIOS that can create RAID volumes and write the configuration info to config blocks on the disks. The BIOS can do I/O to these volumes, and the OS must understand the config blocks and implement RAID in software in order to be able to use these volumes. Only SPAN (simple concatenation) and RAID0 are supported at this time, and writing back config blocks is also not supported at this time. Currently, only the Promise configuration scheme is supported, although supporting the Highpoint scheme should not be too difficult. In any case, this is sufficient to use the Promise RAID0 volume (thus preserving the win2k AS installation) on this new Intel server I have. Thanks to Soren Schmidt for doing the work in FreeBSD; it made this task much easier. The config block parsing code is adapted from his work.
122 lines
4.0 KiB
C
122 lines
4.0 KiB
C
/* $NetBSD: ata_raidvar.h,v 1.1 2003/01/27 18:21:28 thorpej Exp $ */
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/*
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* Copyright (c) 2003 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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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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* 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _DEV_ATA_ATA_RAIDVAR_H_
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#define _DEV_ATA_ATA_RAIDVAR_H_
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#include <sys/queue.h>
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/*
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* Types of RAID configurations we support. Do not change the order
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* of this list, as it will change the order in which the arrays are
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* sorted.
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*/
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#define ATA_RAID_TYPE_PROMISE 0
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#define ATA_RAID_TYPE_MAX 0
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/*
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* Max # of disks supported by a single array. This is limited by
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* the number that the individual controller config blocks can support:
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*
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* Promise 8
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*/
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#define ATA_RAID_MAX_DISKS 8
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struct ataraid_disk_info {
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struct device *adi_dev; /* disk's device */
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int adi_status; /* disk's status */
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u_int adi_sectors;
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u_int adi_compsize; /* in sectors */
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};
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/* adi_status */
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#define ADI_S_ONLINE 0x01
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#define ADI_S_ASSIGNED 0x02
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#define ADI_S_SPARE 0x04
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struct ataraid_array_info {
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TAILQ_ENTRY(ataraid_array_info) aai_list;
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struct device *aai_ld; /* associated logical disk */
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u_int aai_type; /* array type */
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u_int aai_arrayno; /* array number */
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int aai_level; /* RAID level */
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int aai_generation; /* config generaion # */
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int aai_status; /* array status */
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/* Geometry info. */
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u_int aai_interleave; /* stripe size */
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u_int aai_width; /* array width */
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u_int aai_ndisks; /* number of disks */
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u_int aai_heads; /* tracks/cyl */
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u_int aai_sectors; /* secs/track */
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u_int aai_cylinders; /* cyl/unit */
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u_int aai_capacity; /* in sectors */
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u_int aai_offset; /* component start offset */
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u_int aai_reserved; /* component reserved sectors */
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struct ataraid_disk_info aai_disks[ATA_RAID_MAX_DISKS];
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};
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/* aai_level */
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#define AAI_L_SPAN 0x01
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#define AAI_L_RAID0 0x02
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#define AAI_L_RAID1 0x04
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/* aai_status */
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#define AAI_S_READY 0x01
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#define AAI_S_DEGRADED 0x02
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struct vnode;
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struct wd_softc;
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typedef TAILQ_HEAD(, ataraid_array_info) ataraid_array_info_list_t;
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extern ataraid_array_info_list_t ataraid_array_info_list;
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void ata_raid_check_component(struct device *);
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const char *ata_raid_type_name(u_int);
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struct ataraid_array_info *ata_raid_get_array_info(u_int, u_int);
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int ata_raid_config_block_rw(struct vnode *, daddr_t, void *,
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size_t, int);
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/* Promise RAID support */
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int ata_raid_read_config_promise(struct wd_softc *);
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#endif /* _DEV_ATA_ATA_RAIDVAR_H_ */
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