sys/dev/ata/ata_raid_promise.c

   1 /*      $NetBSD: ata_raid_promise.c,v 1.10 2008/02/02 16:15:02 mjf 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 Promise ATA RAID controller configuration blocks.
  33  *
  34  * Adapted to NetBSD by Jason R. Thorpe of Wasabi Systems, Inc.
  35  */
  36
  37 #include <sys/cdefs.h>
  38 __KERNEL_RCSID(0, "$NetBSD: ata_raid_promise.c,v 1.10 2008/02/02 16:15:02 mjf 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 int
  68 ata_raid_read_config_promise(struct wd_softc *sc)
  69 {
  70         struct promise_raid_conf *info;
  71         struct vnode *vp;
  72         int bmajor, error, count;
  73         u_int disk;
  74         dev_t dev;
  75         uint32_t cksum, *ckptr;
  76         struct ataraid_array_info *aai;
  77         struct ataraid_disk_info *adi;
  78
  79         info = malloc(sizeof(*info), M_DEVBUF, M_WAITOK);
  80
  81         bmajor = devsw_name2blk(device_xname(sc->sc_dev), NULL, 0);
  82
  83         /* Get a vnode for the raw partition of this disk. */
  84         dev = MAKEDISKDEV(bmajor, device_unit(sc->sc_dev), RAW_PART);
  85         error = bdevvp(dev, &vp);
  86         if (error)
  87                 goto out;
  88
  89         error = VOP_OPEN(vp, FREAD, NOCRED);
  90         if (error) {
  91                 vput(vp);
  92                 goto out;
  93         }
  94
  95         error = ata_raid_config_block_rw(vp, PR_LBA(sc), info,
  96             sizeof(*info), B_READ);
  97         VOP_CLOSE(vp, FREAD, NOCRED);
  98         vput(vp);
  99         if (error) {
 100                 aprint_error_dev(sc->sc_dev,
 101                     "error %d reading Promise config block\n", error);
 102                 goto out;
 103         }
 104
 105         /* Check the signature. */
 106         if (strncmp(info->promise_id, PR_MAGIC, sizeof(PR_MAGIC)) != 0) {
 107                 DPRINTF(("%s: Promise signature check failed\n",
 108                     device_xname(sc->sc_dev)));
 109                 error = ESRCH;
 110                 goto out;
 111         }
 112
 113         /* Verify the checksum. */
 114         for (cksum = 0, ckptr = (uint32_t *) info, count = 0; count < 511;
 115              count++)
 116                 cksum += *ckptr++;
 117         if (cksum != *ckptr) {
 118                 DPRINTF(("%s: Promise checksum failed\n",
 119                     device_xname(sc->sc_dev)));
 120                 error = ESRCH;
 121                 goto out;
 122         }
 123
 124         if (info->raid.integrity != PR_I_VALID) {
 125                 DPRINTF(("%s: Promise config block marked invalid\n",
 126                     device_xname(sc->sc_dev)));
 127                 error = ESRCH;
 128                 goto out;
 129         }
 130
 131         /*
 132          * Lookup or allocate a new array info structure for
 133          * this array.
 134          */
 135         aai = ata_raid_get_array_info(ATA_RAID_TYPE_PROMISE,
 136             info->raid.array_number);
 137
 138         if (info->raid.generation == 0 ||
 139             info->raid.generation > aai->aai_generation) {
 140                 aai->aai_generation = info->raid.generation;
 141                 /* aai_type and aai_arrayno filled in already */
 142                 if ((info->raid.status &
 143                      (PR_S_VALID | PR_S_ONLINE | PR_S_INITED | PR_S_READY)) ==
 144                     (PR_S_VALID | PR_S_ONLINE | PR_S_INITED | PR_S_READY)) {
 145                         aai->aai_status |= AAI_S_READY;
 146                         if (info->raid.status & PR_S_DEGRADED)
 147                                 aai->aai_status |= AAI_S_DEGRADED;
 148                 } else
 149                         aai->aai_status &= ~AAI_S_READY;
 150
 151                 switch (info->raid.type) {
 152                 case PR_T_RAID0:
 153                         aai->aai_level = AAI_L_RAID0;
 154                         break;
 155
 156                 case PR_T_RAID1:
 157                         aai->aai_level = AAI_L_RAID1;
 158                         if (info->raid.array_width > 1)
 159                                 aai->aai_level |= AAI_L_RAID0;
 160                         break;
 161
 162                 case PR_T_SPAN:
 163                         aai->aai_level = AAI_L_SPAN;
 164                         break;
 165
 166                 default:
 167                         aprint_error_dev(sc->sc_dev,
 168                             "unknown Promise RAID type 0x%02x\n",
 169                             info->raid.type);
 170                         error = EINVAL;
 171                         goto out;
 172                 }
 173
 174                 aai->aai_interleave = 1U << info->raid.stripe_shift;
 175                 aai->aai_width = info->raid.array_width;
 176                 aai->aai_ndisks = info->raid.total_disks;
 177                 aai->aai_heads = info->raid.heads + 1;
 178                 aai->aai_sectors = info->raid.sectors;
 179                 aai->aai_cylinders = info->raid.cylinders + 1;
 180                 aai->aai_capacity = info->raid.total_sectors;
 181                 aai->aai_offset = 0;
 182                 aai->aai_reserved = 63;
 183
 184                 for (disk = 0; disk < aai->aai_ndisks; disk++) {
 185                         adi = &aai->aai_disks[disk];
 186                         adi->adi_status = 0;
 187                         if (info->raid.disk[disk].flags & PR_F_ONLINE)
 188                                 adi->adi_status |= ADI_S_ONLINE;
 189                         if (info->raid.disk[disk].flags & PR_F_ASSIGNED)
 190                                 adi->adi_status |= ADI_S_ASSIGNED;
 191                         if (info->raid.disk[disk].flags & PR_F_SPARE) {
 192                                 adi->adi_status &= ~ADI_S_ONLINE;
 193                                 adi->adi_status |= ADI_S_SPARE;
 194                         }
 195                         if (info->raid.disk[disk].flags &
 196                             (PR_F_REDIR | PR_F_DOWN))
 197                                 adi->adi_status &= ~ADI_S_ONLINE;
 198                 }
 199         }
 200         adi = &aai->aai_disks[info->raid.disk_number];
 201         if (adi->adi_status) {
 202                 adi->adi_dev = sc->sc_dev;
 203                 adi->adi_sectors = info->raid.disk_sectors;
 204                 adi->adi_compsize = sc->sc_capacity - aai->aai_reserved;
 205         }
 206
 207         error = 0;
 208
 209  out:
 210         free(info, M_DEVBUF);
 211         return (error);
 212 }