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      1 /*	$NetBSD: ata_raid_adaptec.c,v 1.13 2023/08/01 07:58:41 mrg Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2000,2001,2002 Sren Schmidt <sos (at) FreeBSD.org>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer,
     12  *    without modification, immediately at the beginning of the file.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. The name of the author may not be used to endorse or promote products
     17  *    derived from this software without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 /*
     32  * Support for parsing Adaptec ATA RAID controller configuration blocks.
     33  *
     34  * Adapted to NetBSD by Allen K. Briggs
     35  */
     36 
     37 #include <sys/cdefs.h>
     38 __KERNEL_RCSID(0, "$NetBSD: ata_raid_adaptec.c,v 1.13 2023/08/01 07:58:41 mrg Exp $");
     39 
     40 #include <sys/param.h>
     41 #include <sys/buf.h>
     42 #include <sys/bufq.h>
     43 #include <sys/conf.h>
     44 #include <sys/device.h>
     45 #include <sys/disk.h>
     46 #include <sys/disklabel.h>
     47 #include <sys/fcntl.h>
     48 #include <sys/vnode.h>
     49 #include <sys/kauth.h>
     50 
     51 #include <miscfs/specfs/specdev.h>
     52 
     53 #include <dev/ata/atareg.h>
     54 #include <dev/ata/atavar.h>
     55 #include <dev/ata/wdvar.h>
     56 
     57 #include <dev/ata/ata_raidreg.h>
     58 #include <dev/ata/ata_raidvar.h>
     59 
     60 #ifdef ATA_RAID_DEBUG
     61 #define	DPRINTF(x)	printf x
     62 #else
     63 #define	DPRINTF(x)	/* nothing */
     64 #endif
     65 
     66 int
     67 ata_raid_read_config_adaptec(struct wd_softc *sc)
     68 {
     69 	struct dk_softc *dksc = &sc->sc_dksc;
     70 	struct adaptec_raid_conf *info;
     71 	struct atabus_softc *atabus;
     72 	struct vnode *vp;
     73 	int bmajor, error;
     74 	dev_t dev;
     75 	uint32_t gen, drive;
     76 	struct ataraid_array_info *aai;
     77 	struct ataraid_disk_info *adi;
     78 
     79 	info = kmem_zalloc(sizeof(*info), KM_SLEEP);
     80 
     81 	bmajor = devsw_name2blk(dksc->sc_xname, NULL, 0);
     82 
     83 	/* Get a vnode for the raw partition of this disk. */
     84 	dev = MAKEDISKDEV(bmajor, device_unit(dksc->sc_dev), RAW_PART);
     85 	error = bdevvp(dev, &vp);
     86 	if (error)
     87 		goto out;
     88 
     89 	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
     90 	error = VOP_OPEN(vp, FREAD, NOCRED);
     91 	if (error) {
     92 		vput(vp);
     93 		goto out;
     94 	}
     95 
     96 	error = ata_raid_config_block_rw(vp, ADP_LBA(sc), info,
     97 	    sizeof(*info), B_READ);
     98 	VOP_CLOSE(vp, FREAD, NOCRED);
     99 	vput(vp);
    100 	if (error) {
    101 		aprint_error_dev(dksc->sc_dev,
    102 		    "error %d reading Adaptec config block\n", error);
    103 		goto out;
    104 	}
    105 
    106 	info->magic_0 = be32toh(info->magic_0);
    107 	info->magic_1 = be32toh(info->magic_1);
    108 	info->magic_2 = be32toh(info->magic_2);
    109 	info->magic_3 = be32toh(info->magic_3);
    110 	info->magic_4 = be32toh(info->magic_4);
    111 	/* Check the signature. */
    112 	if (info->magic_0 != ADP_MAGIC_0 || info->magic_3 != ADP_MAGIC_3) {
    113 		DPRINTF(("%s: Adaptec signature check failed\n",
    114 		    dksc->sc_xname));
    115 		error = ESRCH;
    116 		goto out;
    117 	}
    118 
    119 	/*
    120 	 * Lookup or allocate a new array info structure for
    121 	 * this array.
    122 	 */
    123 	aai = ata_raid_get_array_info(ATA_RAID_TYPE_ADAPTEC,
    124 		be32toh(info->configs[0].disk_number));
    125 
    126 	gen = be32toh(info->generation);
    127 
    128 	if (gen == 0 || gen > aai->aai_generation) {
    129 		aai->aai_generation = gen;
    130 
    131 		aai->aai_status = AAI_S_READY;
    132 
    133 		switch (info->configs[0].type) {
    134 		case ADP_T_RAID0:
    135 			aai->aai_level = AAI_L_RAID0;
    136 			aai->aai_interleave =
    137 			    (be16toh(info->configs[0].stripe_sectors) >> 1);
    138 			aai->aai_width = be16toh(info->configs[0].total_disks);
    139 			break;
    140 
    141 		case ADP_T_RAID1:
    142 			aai->aai_level = AAI_L_RAID1;
    143 			aai->aai_interleave = 0;
    144 			aai->aai_width = be16toh(info->configs[0].total_disks)
    145 			    / 2;
    146 			break;
    147 
    148 		default:
    149 			aprint_error_dev(dksc->sc_dev,
    150 			    "unknown Adaptec RAID type 0x%02x\n",
    151 			    info->configs[0].type);
    152 			error = EINVAL;
    153 			goto out;
    154 		}
    155 
    156 		aai->aai_type = ATA_RAID_TYPE_ADAPTEC;
    157 		aai->aai_ndisks = be16toh(info->configs[0].total_disks);
    158 		aai->aai_capacity = be32toh(info->configs[0].sectors);
    159 		aai->aai_heads = 255;
    160 		aai->aai_sectors = 63;
    161 		aai->aai_cylinders = aai->aai_capacity / (63 * 255);
    162 		aai->aai_offset = 0;
    163 		aai->aai_reserved = 17;
    164 		strlcpy(aai->aai_name, info->configs[0].name,
    165 		    sizeof(aai->aai_name));
    166 
    167 		/* XXX - bogus.  RAID1 shouldn't really have an interleave */
    168 		if (aai->aai_interleave == 0)
    169 			aai->aai_interleave = aai->aai_capacity;
    170 	}
    171 
    172 	atabus = device_private(device_parent(dksc->sc_dev));
    173 	drive = atabus->sc_chan->ch_channel;
    174 	if (drive >= aai->aai_ndisks) {
    175 		aprint_error_dev(dksc->sc_dev,
    176 		    "drive number %d doesn't make sense within %d-disk "
    177 		    "array\n", drive, aai->aai_ndisks);
    178 		error = EINVAL;
    179 		goto out;
    180 	}
    181 
    182 	adi = &aai->aai_disks[drive];
    183 	adi->adi_dev = dksc->sc_dev;
    184 	adi->adi_status = ADI_S_ONLINE | ADI_S_ASSIGNED;
    185 	adi->adi_sectors = aai->aai_capacity;
    186 	adi->adi_compsize = be32toh(info->configs[drive+1].sectors);
    187 
    188 	error = 0;
    189 
    190  out:
    191 	kmem_free(info, sizeof(*info));
    192 	return (error);
    193 }
    194