sys/dev/ata/ata_raid_nvidia.c

   1 /*      $NetBSD$        */
   2
   3 /*-
   4  * Copyright (c) 2000 - 2008 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  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 /*
  30  * Support for parsing nVIDIA MediaShield RAID controller configuration blocks.
  31  *
  32  * Adapted to NetBSD by Tatoku Ogaito (tacha@NetBSD.org)
  33  */
  34
  35 #include <sys/cdefs.h>
  36 __KERNEL_RCSID(0, "$NetBSD$");
  37
  38 #include <sys/param.h>
  39 #include <sys/buf.h>
  40 #include <sys/bufq.h>
  41 #include <sys/conf.h>
  42 #include <sys/device.h>
  43 #include <sys/disk.h>
  44 #include <sys/disklabel.h>
  45 #include <sys/fcntl.h>
  46 #include <sys/malloc.h>
  47 #include <sys/vnode.h>
  48 #include <sys/kauth.h>
  49
  50 #include <miscfs/specfs/specdev.h>
  51
  52 #include <dev/ata/atareg.h>
  53 #include <dev/ata/atavar.h>
  54 #include <dev/ata/wdvar.h>
  55
  56 #include <dev/ata/ata_raidreg.h>
  57 #include <dev/ata/ata_raidvar.h>
  58
  59 #ifdef ATA_RAID_DEBUG
  60 #define DPRINTF(x)      printf x
  61 #else
  62 #define DPRINTF(x)      /* nothing */
  63 #endif
  64
  65 #ifdef ATA_RAID_DEBUG
  66 static const char *
  67 ata_raid_nvidia_type(int type)
  68 {
  69         static char buffer[16];
  70
  71         switch (type) {
  72         case NV_T_SPAN:     return "SPAN";
  73         case NV_T_RAID0:    return "RAID0";
  74         case NV_T_RAID1:    return "RAID1";
  75         case NV_T_RAID3:    return "RAID3";
  76         case NV_T_RAID5:    return "RAID5";
  77         case NV_T_RAID01:   return "RAID0+1";
  78         default:
  79                 sprintf(buffer, "UNKNOWN 0x%02x", type);
  80                 return buffer;
  81     }
  82 }
  83
  84 static void
  85 ata_raid_nvidia_print_info(struct nvidia_raid_conf *info)
  86 {
  87     printf("******** ATA nVidia MediaShield Metadata ********\n");
  88     printf("nvidia_id           <%.8s>\n", info->nvidia_id);
  89     printf("config_size         %d\n", info->config_size);
  90     printf("checksum            0x%08x\n", info->checksum);
  91     printf("version             0x%04x\n", info->version);
  92     printf("disk_number         %d\n", info->disk_number);
  93     printf("dummy_0             0x%02x\n", info->dummy_0);
  94     printf("total_sectors       %d\n", info->total_sectors);
  95     printf("sectors_size        %d\n", info->sector_size);
  96     printf("serial              %.16s\n", info->serial);
  97     printf("revision            %.4s\n", info->revision);
  98     printf("dummy_1             0x%08x\n", info->dummy_1);
  99     printf("magic_0             0x%08x\n", info->magic_0);
 100     printf("magic_1             0x%016jx\n", info->magic_1);
 101     printf("magic_2             0x%016jx\n", info->magic_2);
 102     printf("flags               0x%02x\n", info->flags);
 103     printf("array_width         %d\n", info->array_width);
 104     printf("total_disks         %d\n", info->total_disks);
 105     printf("dummy_2             0x%02x\n", info->dummy_2);
 106     printf("type                %s\n", ata_raid_nvidia_type(info->type));
 107     printf("dummy_3             0x%04x\n", info->dummy_3);
 108     printf("stripe_sectors      %d\n", info->stripe_sectors);
 109     printf("stripe_bytes        %d\n", info->stripe_bytes);
 110     printf("stripe_shift        %d\n", info->stripe_shift);
 111     printf("stripe_mask         0x%08x\n", info->stripe_mask);
 112     printf("stripe_sizesectors  %d\n", info->stripe_sizesectors);
 113     printf("stripe_sizebytes    %d\n", info->stripe_sizebytes);
 114     printf("rebuild_lba         %d\n", info->rebuild_lba);
 115     printf("dummy_4             0x%08x\n", info->dummy_4);
 116     printf("dummy_5             0x%08x\n", info->dummy_5);
 117     printf("status              0x%08x\n", info->status);
 118     printf("=================================================\n");
 119 }
 120 #endif
 121
 122 int
 123 ata_raid_read_config_nvidia(struct wd_softc *sc)
 124 {
 125         struct nvidia_raid_conf *info;
 126         struct vnode *vp;
 127         int bmajor, error, count;
 128         dev_t dev;
 129         uint32_t cksum, *ckptr;
 130         struct ataraid_array_info *aai;
 131         struct ataraid_disk_info *adi;
 132         static struct _arrayno {
 133           uint64_t magic1;
 134           uint64_t magic2;
 135           struct _arrayno *next;
 136         } arrayno = { 0, 0, NULL}, *anptr;
 137
 138         info = malloc(sizeof(*info), M_DEVBUF, M_WAITOK);
 139
 140         bmajor = devsw_name2blk(device_xname(sc->sc_dev), NULL, 0);
 141
 142         /* Get a vnode for the raw partition of this disk. */
 143         dev = MAKEDISKDEV(bmajor, device_unit(sc->sc_dev), RAW_PART);
 144         error = bdevvp(dev, &vp);
 145         if (error)
 146                 goto out;
 147
 148         error = VOP_OPEN(vp, FREAD, NOCRED);
 149         if (error) {
 150                 vput(vp);
 151                 goto out;
 152         }
 153
 154         error = ata_raid_config_block_rw(vp, NVIDIA_LBA(sc), info,
 155             sizeof(*info), B_READ);
 156         VOP_CLOSE(vp, FREAD, NOCRED);
 157         vput(vp);
 158         if (error) {
 159                 aprint_error_dev(sc->sc_dev,
 160                     "error %d reading nVidia MediaShield config block\n", error);
 161                 goto out;
 162         }
 163
 164 #ifdef ATA_RAID_DEBUG
 165         ata_raid_nvidia_print_info(info);
 166 #endif
 167
 168         /* Check the signature. */
 169         if (strncmp(info->nvidia_id, NV_MAGIC, strlen(NV_MAGIC)) != 0) {
 170                 DPRINTF(("%s: nVidia signature check failed\n",
 171                     device_xname(sc->sc_dev)));
 172                 error = ESRCH;
 173                 goto out;
 174         }
 175
 176         /* check if the checksum is OK */
 177         for (cksum = 0, ckptr = (uint32_t *)info, count = 0; count < info->config_size;
 178              count++)
 179                 cksum += *ckptr++;
 180         if (cksum) {
 181                 DPRINTF(("%s: nVidia checksum failed (0x%02x)\n",
 182                          device_xname(sc->sc_dev), cksum));
 183                 error = ESRCH;
 184                 goto out;
 185         }
 186
 187         /*
 188          * Lookup or allocate a new array info structure for
 189          * this array. Since nVidia raid information does not
 190          * provides array# directory, we must count the number.
 191          * The available traces are magic_1 and magic_2.
 192          */
 193         for (anptr = &arrayno, count = 0; anptr->next; anptr = anptr->next, count++) {
 194                 if (anptr->magic1 == info->magic_1 &&
 195                     anptr->magic2 == info->magic_2)
 196             break;
 197         }
 198         if (anptr->next == NULL) {
 199                 /* new array */
 200                 anptr->magic1 = info->magic_1;
 201                 anptr->magic2 = info->magic_2;
 202                 anptr->next = malloc(sizeof(arrayno), M_DEVBUF, M_WAITOK);
 203         }
 204         aai = ata_raid_get_array_info(ATA_RAID_TYPE_NVIDIA, count);
 205
 206         aai->aai_status = AAI_S_READY;
 207         if (info->status & NV_S_DEGRADED)
 208                 aai->aai_status |= AAI_S_DEGRADED;
 209
 210         switch (info->type) {
 211         case NV_T_RAID0:
 212                 aai->aai_level = AAI_L_RAID0;
 213                 break;
 214
 215         case NV_T_RAID1:
 216                 aai->aai_level = AAI_L_RAID1;
 217                 break;
 218
 219         case NV_T_RAID5:
 220                 aai->aai_level = AAI_L_RAID5;
 221                 break;
 222
 223         case NV_T_RAID01:
 224                 aai->aai_level = AAI_L_RAID0 | AAI_L_RAID1;
 225                 break;
 226
 227         case NV_T_SPAN:
 228                 aai->aai_level = AAI_L_SPAN;
 229                 break;
 230
 231         default:
 232                 aprint_error_dev(sc->sc_dev,
 233                          "unknown nVidia type 0x%02x\n", info->type);
 234                 error = EINVAL;
 235                 goto out;
 236         }
 237
 238         aai->aai_type = ATA_RAID_TYPE_NVIDIA;
 239         aai->aai_interleave = info->stripe_sectors;
 240         aai->aai_width = info->array_width;
 241
 242         aai->aai_ndisks = info->total_disks;
 243         aai->aai_capacity = info->total_sectors;
 244         aai->aai_heads = 255;
 245         aai->aai_sectors = 63;
 246         aai->aai_cylinders = aai->aai_capacity / (aai->aai_heads * aai->aai_sectors);
 247         aai->aai_offset = 0;
 248         aai->aai_reserved = 2;
 249
 250         adi = &aai->aai_disks[info->disk_number];
 251         adi->adi_dev = sc->sc_dev;
 252         adi->adi_status = ADI_S_ONLINE | ADI_S_ASSIGNED;
 253         adi->adi_sectors = aai->aai_capacity;
 254         adi->adi_compsize = aai->aai_capacity / info->array_width;
 255
 256         error = 0;
 257
 258  out:
 259         free(info, M_DEVBUF);
 260         return (error);
 261 }