270 lines
7.6 KiB
C
270 lines
7.6 KiB
C
/* $NetBSD: ata_raid_jmicron.c,v 1.9 2023/08/01 07:58:41 mrg Exp $ */
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/*-
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* Copyright (c) 2000-2008 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 JMicron Technology RAID controller configuration blocks.
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*
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* Adapted to NetBSD by Juan Romero Pardines (xtraeme@gmail.org).
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ata_raid_jmicron.c,v 1.9 2023/08/01 07:58:41 mrg 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/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_jmicron_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 JM_T_RAID0:
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return "RAID0";
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case JM_T_RAID1:
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return "RAID1";
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case JM_T_RAID01:
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return "RAID0+1";
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case JM_T_RAID5:
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return "RAID5";
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case JM_T_JBOD:
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return "JBOD";
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default:
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snprintf(buffer, sizeof(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_jmicron_print_info(struct jmicron_raid_conf *info)
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{
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int i;
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printf("****** ATA JMicron Technology Corp Metadata ******\n");
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printf("signature %.2s\n", info->signature);
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printf("version 0x%04x\n", info->version);
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printf("checksum 0x%04x\n", info->checksum);
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printf("disk_id 0x%08x\n", info->disk_id);
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printf("offset 0x%08x\n", info->offset);
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printf("disk_sectors_low 0x%08x\n", info->disk_sectors_low);
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printf("disk_sectors_high 0x%08x\n", info->disk_sectors_high);
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printf("name %.16s\n", info->name);
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printf("type %s\n",
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ata_raid_jmicron_type(info->type));
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printf("stripe_shift %d\n", info->stripe_shift);
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printf("flags 0x%04x\n", info->flags);
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printf("spare:\n");
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for (i = 0; i < 2 && info->spare[i]; i++)
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printf(" %d 0x%08x\n", i, info->spare[i]);
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printf("disks:\n");
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for (i = 0; i < 8 && info->disks[i]; i++)
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printf(" %d 0x%08x\n", i, info->disks[i]);
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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_jmicron(struct wd_softc *sc)
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{
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struct dk_softc *dksc = &sc->sc_dksc;
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struct atabus_softc *atabus;
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struct jmicron_raid_conf *info;
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struct vnode *vp;
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struct ataraid_array_info *aai;
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struct ataraid_disk_info *adi;
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uint64_t disk_size;
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uint32_t drive;
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uint16_t checksum, *ptr;
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int bmajor, error, count, disk, total_disks;
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dev_t dev;
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info = kmem_zalloc(sizeof(*info), KM_SLEEP);
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bmajor = devsw_name2blk(dksc->sc_xname, 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(dksc->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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vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
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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, JMICRON_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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DPRINTF(("%s: error %d reading JMicron config block\n",
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dksc->sc_xname, error));
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goto out;
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}
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/* Check for JMicron signature. */
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if (strncmp(info->signature, JMICRON_MAGIC, 2)) {
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DPRINTF(("%s: JMicron RAID signature check failed\n",
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dksc->sc_xname));
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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 (checksum = 0, ptr = (uint16_t *)info, count = 0;
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count < 64; count++)
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checksum += *ptr++;
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if (checksum) {
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DPRINTF(("%s: JMicron checksum failed\n",
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dksc->sc_xname));
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error = ESRCH;
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goto out;
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}
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#ifdef ATA_RAID_DEBUG
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ata_raid_jmicron_print_info(info);
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#endif
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/*
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* Check that there aren't stale config blocks without
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* any array set configured.
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*/
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for (total_disks = 0, disk = 0; disk < JM_MAX_DISKS; disk++)
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if (info->disks[disk] == info->disk_id)
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total_disks++;
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if (total_disks <= 1) {
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error = EINVAL;
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goto out;
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}
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/*
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* Check volume's state and bail out if it's not acceptable.
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*/
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if ((info->flags & (JM_F_READY|JM_F_BOOTABLE|JM_F_ACTIVE)) == 0) {
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error = EINVAL;
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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.
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*/
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aai = ata_raid_get_array_info(ATA_RAID_TYPE_JMICRON, 0);
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aai->aai_status = AAI_S_READY;
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switch (info->type) {
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case JM_T_RAID0:
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aai->aai_level = AAI_L_RAID0;
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aai->aai_width = total_disks;
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break;
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case JM_T_RAID1:
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aai->aai_level = AAI_L_RAID1;
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aai->aai_width = 1;
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break;
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case JM_T_RAID01:
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aai->aai_level = AAI_L_RAID0 | AAI_L_RAID1;
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aai->aai_width = total_disks / 2;
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break;
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case JM_T_JBOD:
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aai->aai_level = AAI_L_SPAN;
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aai->aai_width = total_disks;
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break;
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default:
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DPRINTF(("%s: unknown JMicron RAID type 0x%02x\n",
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dksc->sc_xname, info->type));
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error = EINVAL;
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goto out;
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}
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disk_size = (info->disk_sectors_high << 16) + info->disk_sectors_low;
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aai->aai_type = ATA_RAID_TYPE_JMICRON;
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aai->aai_generation = 0;
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aai->aai_capacity = disk_size * aai->aai_width;
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aai->aai_interleave = 2 << info->stripe_shift;
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aai->aai_ndisks = total_disks;
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aai->aai_heads = 255;
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aai->aai_sectors = 63;
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aai->aai_cylinders =
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aai->aai_capacity / (aai->aai_heads * aai->aai_sectors);
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aai->aai_offset = info->offset * 16;
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aai->aai_reserved = 2;
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strlcpy(aai->aai_name, info->name, sizeof(aai->aai_name));
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atabus = device_private(device_parent(dksc->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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DPRINTF(("%s: drive number %d doesn't make sense within "
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"%d-disk array\n", dksc->sc_xname,
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drive, aai->aai_ndisks));
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error = EINVAL;
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goto out;
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}
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if (info->disks[drive] == info->disk_id) {
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adi = &aai->aai_disks[drive];
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adi->adi_dev = dksc->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 = disk_size - aai->aai_reserved;
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}
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error = 0;
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out:
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kmem_free(info, sizeof(*info));
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return error;
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}
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