sys/dev/ata/ata_raid_via.c

   1 /*      $NetBSD: ata_raid_via.c,v 1.5 2008/03/18 20:46:36 cube Exp $    */
   2
   3 /*-
   4  * Copyright (c) 2000,2001,2002 Søren Schmidt <sos@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 VIA V-RAID ATA RAID controller configuration blocks.
  33  *
  34  * Adapted to NetBSD by Tim Rightnour (garbled@netbsd.org)
  35  */
  36
  37 #include <sys/cdefs.h>
  38 __KERNEL_RCSID(0, "$NetBSD: ata_raid_via.c,v 1.5 2008/03/18 20:46:36 cube 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/malloc.h>
  49 #include <sys/vnode.h>
  50 #include <sys/kauth.h>
  51
  52 #include <miscfs/specfs/specdev.h>
  53
  54 #include <dev/ata/atareg.h>
  55 #include <dev/ata/atavar.h>
  56 #include <dev/ata/wdvar.h>
  57
  58 #include <dev/ata/ata_raidreg.h>
  59 #include <dev/ata/ata_raidvar.h>
  60
  61 #ifdef ATA_RAID_DEBUG
  62 #define DPRINTF(x)      printf x
  63 #else
  64 #define DPRINTF(x)      /* nothing */
  65 #endif
  66
  67 #ifdef ATA_RAID_DEBUG
  68 static const char *
  69 ata_raid_via_type(int type)
  70 {
  71         static char buffer[16];
  72
  73         switch (type) {
  74             case VIA_T_RAID0:   return "RAID0";
  75             case VIA_T_RAID1:   return "RAID1";
  76             case VIA_T_RAID5:   return "RAID5";
  77             case VIA_T_RAID01:  return "RAID0+1";
  78             case VIA_T_SPAN:    return "SPAN";
  79             default:
  80                 sprintf(buffer, "UNKNOWN 0x%02x", type);
  81                 return buffer;
  82         }
  83 }
  84
  85 static void
  86 ata_raid_via_print_info(struct via_raid_conf *info)
  87 {
  88         int i;
  89
  90         printf("*************** ATA VIA Metadata ****************\n");
  91         printf("magic               0x%02x\n", info->magic);
  92         printf("dummy_0             0x%02x\n", info->dummy_0);
  93         printf("type                %s\n",
  94             ata_raid_via_type(info->type & VIA_T_MASK));
  95         printf("bootable            %d\n", info->type & VIA_T_BOOTABLE);
  96         printf("unknown             %d\n", info->type & VIA_T_UNKNOWN);
  97         printf("disk_index          0x%02x\n", info->disk_index);
  98         printf("stripe_layout       0x%02x\n", info->stripe_layout);
  99         printf(" stripe_disks       %d\n", info->stripe_layout & VIA_L_DISKS);
 100         printf(" stripe_sectors     %d\n",
 101             0x08 << ((info->stripe_layout & VIA_L_MASK) >> VIA_L_SHIFT));
 102         printf("disk_sectors        %ju\n", info->disk_sectors);
 103         printf("disk_id             0x%08x\n", info->disk_id);
 104         printf("DISK#   disk_id\n");
 105         for (i = 0; i < 8; i++) {
 106         if (info->disks[i])
 107                 printf("  %d    0x%08x\n", i, info->disks[i]);
 108         }
 109         printf("checksum            0x%02x\n", info->checksum);
 110         printf("=================================================\n");
 111 }
 112 #endif
 113
 114 int
 115 ata_raid_read_config_via(struct wd_softc *sc)
 116 {
 117         struct via_raid_conf *info;
 118         struct atabus_softc *atabus;
 119         struct vnode *vp;
 120         int bmajor, error;
 121         dev_t dev;
 122         uint32_t drive;
 123         uint8_t checksum, checksum_alt, byte3, *ptr;
 124         int count, disk;
 125         struct ataraid_array_info *aai;
 126         struct ataraid_disk_info *adi;
 127
 128         info = malloc(sizeof(*info), M_DEVBUF, M_WAITOK);
 129
 130         bmajor = devsw_name2blk(device_xname(sc->sc_dev), NULL, 0);
 131
 132         /* Get a vnode for the raw partition of this disk. */
 133         dev = MAKEDISKDEV(bmajor, device_unit(sc->sc_dev), RAW_PART);
 134         error = bdevvp(dev, &vp);
 135         if (error)
 136                 goto out;
 137
 138         error = VOP_OPEN(vp, FREAD, NOCRED);
 139         if (error) {
 140                 vput(vp);
 141                 goto out;
 142         }
 143
 144         error = ata_raid_config_block_rw(vp, VIA_LBA(sc), info,
 145             sizeof(*info), B_READ);
 146         VOP_CLOSE(vp, FREAD, NOCRED);
 147         vput(vp);
 148         if (error) {
 149                 aprint_error_dev(sc->sc_dev,
 150                     "error %d reading VIA V-RAID config block\n", error);
 151                 goto out;
 152         }
 153
 154 #ifdef ATA_RAID_DEBUG
 155         ata_raid_via_print_info(info);
 156         printf("MAGIC == 0x%02x\n", info->magic);
 157 #endif
 158
 159         /* Check the signature. */
 160         if (info->magic != VIA_MAGIC) {
 161                 DPRINTF(("%s: VIA V-RAID signature check failed\n",
 162                     device_xname(sc->sc_dev)));
 163                 error = ESRCH;
 164                 goto out;
 165         }
 166
 167         /* calculate checksum and compare for valid */
 168         for (byte3 = 0, checksum = 0, ptr = (uint8_t *)info, count = 0;
 169             count < 50; count++)
 170                 if (count == 3)
 171                         byte3 = *ptr++;
 172                 else
 173                         checksum += *ptr++;
 174         checksum_alt = checksum + (byte3 & ~VIA_T_BOOTABLE);
 175         checksum += byte3;
 176         if (checksum != info->checksum && checksum_alt != info->checksum) {
 177                 DPRINTF(("%s: VIA V-RAID checksum failed 0x%02x != "
 178                     "0x%02x or 0x%02x\n", device_xname(sc->sc_dev),
 179                     info->checksum, checksum, checksum_alt));
 180                 error = ESRCH;
 181                 goto out;
 182         }
 183
 184         /*
 185          * Lookup or allocate a new array info structure for
 186          * this array. Use the serial number of disk0 as the array#
 187          */
 188         aai = ata_raid_get_array_info(ATA_RAID_TYPE_VIA, info->disks[0]);
 189
 190         aai->aai_status = AAI_S_READY;
 191
 192         switch (info->type & VIA_T_MASK) {
 193         case VIA_T_RAID0:
 194                 aai->aai_level = AAI_L_RAID0;
 195                 aai->aai_width = info->stripe_layout & VIA_L_DISKS;
 196                 aai->aai_capacity = aai->aai_width * info->disk_sectors;
 197                 break;
 198
 199         case VIA_T_RAID1:
 200                 aai->aai_level = AAI_L_RAID1;
 201                 aai->aai_width = 1;
 202                 aai->aai_capacity = aai->aai_width * info->disk_sectors;
 203                 break;
 204
 205         case VIA_T_RAID5:
 206                 aai->aai_level = AAI_L_RAID5;
 207                 aai->aai_width = info->stripe_layout & VIA_L_DISKS;
 208                 aai->aai_capacity = (aai->aai_width - 1) * info->disk_sectors;
 209                 break;
 210
 211         case VIA_T_SPAN:
 212                 aai->aai_level = AAI_L_SPAN;
 213                 aai->aai_width = 1;
 214                 aai->aai_capacity += info->disk_sectors; /* XXX ??? */
 215                 break;
 216
 217         default:
 218                 aprint_error_dev(sc->sc_dev,
 219                     "unknown VIA V-RAID type 0x%02x\n", info->type);
 220                 error = EINVAL;
 221                 goto out;
 222         }
 223
 224         aai->aai_type = ATA_RAID_TYPE_VIA;
 225         for (count = 0, disk = 0; disk < 8; disk++)
 226                 if (info->disks[disk])
 227                         count++;
 228         aai->aai_interleave =
 229                 0x08 << ((info->stripe_layout & VIA_L_MASK) >> VIA_L_SHIFT);
 230         aai->aai_ndisks = count;
 231         aai->aai_heads = 255;
 232         aai->aai_sectors = 63;
 233         aai->aai_cylinders = aai->aai_capacity / (63 * 255);
 234         aai->aai_offset = 0;
 235         aai->aai_reserved = 1;
 236
 237         /* XXX - bogus.  RAID1 shouldn't really have an interleave */
 238         if (aai->aai_interleave == 0)
 239                 aai->aai_interleave = aai->aai_capacity;
 240
 241         atabus = device_private(device_parent(sc->sc_dev));
 242         drive = atabus->sc_chan->ch_channel;
 243         if (drive >= aai->aai_ndisks) {
 244                 aprint_error_dev(sc->sc_dev,
 245                     "drive number %d doesn't make sense within %d-disk "
 246                     "array\n", drive, aai->aai_ndisks);
 247                 error = EINVAL;
 248                 goto out;
 249         }
 250
 251         adi = &aai->aai_disks[drive];
 252         adi->adi_dev = sc->sc_dev;
 253         adi->adi_status = ADI_S_ONLINE | ADI_S_ASSIGNED;
 254         adi->adi_sectors = aai->aai_capacity;
 255         adi->adi_compsize = info->disk_sectors;
 256
 257         error = 0;
 258
 259  out:
 260         free(info, M_DEVBUF);
 261         return (error);
 262 }