/*      $NetBSD: ata_raid_adaptec.c,v 1.13 2023/08/01 07:58:41 mrg 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 Adaptec ATA RAID controller configuration blocks.
 *
 * Adapted to NetBSD by Allen K. Briggs
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ata_raid_adaptec.c,v 1.13 2023/08/01 07:58:41 mrg 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/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_adaptec(struct wd_softc *sc)
{
        struct dk_softc *dksc = &sc->sc_dksc;
        struct adaptec_raid_conf *info;
        struct atabus_softc *atabus;
        struct vnode *vp;
        int bmajor, error;
        dev_t dev;
        uint32_t gen, drive;
        struct ataraid_array_info *aai;
        struct ataraid_disk_info *adi;

        info = kmem_zalloc(sizeof(*info), KM_SLEEP);

        bmajor = devsw_name2blk(dksc->sc_xname, NULL, 0);

        /* Get a vnode for the raw partition of this disk. */
        dev = MAKEDISKDEV(bmajor, device_unit(dksc->sc_dev), RAW_PART);
        error = bdevvp(dev, &vp);
        if (error)
                goto out;

        vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
        error = VOP_OPEN(vp, FREAD, NOCRED);
        if (error) {
                vput(vp);
                goto out;
        }

        error = ata_raid_config_block_rw(vp, ADP_LBA(sc), info,
            sizeof(*info), B_READ);
        VOP_CLOSE(vp, FREAD, NOCRED);
        vput(vp);
        if (error) {
                aprint_error_dev(dksc->sc_dev,
                    "error %d reading Adaptec config block\n", error);
                goto out;
        }

        info->magic_0 = be32toh(info->magic_0);
        info->magic_1 = be32toh(info->magic_1);
        info->magic_2 = be32toh(info->magic_2);
        info->magic_3 = be32toh(info->magic_3);
        info->magic_4 = be32toh(info->magic_4);
        /* Check the signature. */
        if (info->magic_0 != ADP_MAGIC_0 || info->magic_3 != ADP_MAGIC_3) {
                DPRINTF(("%s: Adaptec signature check failed\n",
                    dksc->sc_xname));
                error = ESRCH;
                goto out;
        }

        /*
         * Lookup or allocate a new array info structure for
         * this array.
         */
        aai = ata_raid_get_array_info(ATA_RAID_TYPE_ADAPTEC,
                be32toh(info->configs[0].disk_number));

        gen = be32toh(info->generation);

        if (gen == 0 || gen > aai->aai_generation) {
                aai->aai_generation = gen;

                aai->aai_status = AAI_S_READY;

                switch (info->configs[0].type) {
                case ADP_T_RAID0:
                        aai->aai_level = AAI_L_RAID0;
                        aai->aai_interleave = 
                            (be16toh(info->configs[0].stripe_sectors) >> 1);
                        aai->aai_width = be16toh(info->configs[0].total_disks);
                        break;

                case ADP_T_RAID1:
                        aai->aai_level = AAI_L_RAID1;
                        aai->aai_interleave = 0;
                        aai->aai_width = be16toh(info->configs[0].total_disks)
                            / 2;
                        break;

                default:
                        aprint_error_dev(dksc->sc_dev,
                            "unknown Adaptec RAID type 0x%02x\n",
                            info->configs[0].type);
                        error = EINVAL;
                        goto out;
                }

                aai->aai_type = ATA_RAID_TYPE_ADAPTEC;
                aai->aai_ndisks = be16toh(info->configs[0].total_disks);
                aai->aai_capacity = be32toh(info->configs[0].sectors);
                aai->aai_heads = 255;
                aai->aai_sectors = 63;
                aai->aai_cylinders = aai->aai_capacity / (63 * 255);
                aai->aai_offset = 0;
                aai->aai_reserved = 17;
                strlcpy(aai->aai_name, info->configs[0].name,
                    sizeof(aai->aai_name));

                /* 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(dksc->sc_dev));
        drive = atabus->sc_chan->ch_channel;
        if (drive >= aai->aai_ndisks) {
                aprint_error_dev(dksc->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 = dksc->sc_dev;
        adi->adi_status = ADI_S_ONLINE | ADI_S_ASSIGNED;
        adi->adi_sectors = aai->aai_capacity;
        adi->adi_compsize = be32toh(info->configs[drive+1].sectors);

        error = 0;

 out:
        kmem_free(info, sizeof(*info));
        return (error);
}