arch/all-pc/boot/grub2-aros/grub-core/disk/dmraid_nvidia.c

   1 /* dmraid_nvidia.c - module to handle Nvidia fakeraid.  */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2006,2007,2008,2009  Free Software Foundation, Inc.
   5  *
   6  *  GRUB is free software: you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation, either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  GRUB is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <grub/dl.h>
  21 #include <grub/disk.h>
  22 #include <grub/mm.h>
  23 #include <grub/err.h>
  24 #include <grub/misc.h>
  25 #include <grub/diskfilter.h>
  26
  27 GRUB_MOD_LICENSE ("GPLv3+");
  28
  29 #define NV_SIGNATURES           4
  30
  31 #define NV_IDLE                 0
  32 #define NV_SCDB_INIT_RAID       2
  33 #define NV_SCDB_REBUILD_RAID    3
  34 #define NV_SCDB_UPGRADE_RAID    4
  35 #define NV_SCDB_SYNC_RAID       5
  36
  37 #define NV_LEVEL_UNKNOWN        0x00
  38 #define NV_LEVEL_JBOD           0xFF
  39 #define NV_LEVEL_0              0x80
  40 #define NV_LEVEL_1              0x81
  41 #define NV_LEVEL_3              0x83
  42 #define NV_LEVEL_5              0x85
  43 #define NV_LEVEL_10             0x8a
  44 #define NV_LEVEL_1_0            0x8180
  45
  46 #define NV_ARRAY_FLAG_BOOT              1 /* BIOS use only.  */
  47 #define NV_ARRAY_FLAG_ERROR             2 /* Degraded or offline.  */
  48 #define NV_ARRAY_FLAG_PARITY_VALID      4 /* RAID-3/5 parity valid.  */
  49
  50 struct grub_nv_array
  51 {
  52   grub_uint32_t version;
  53   grub_uint32_t signature[NV_SIGNATURES];
  54   grub_uint8_t raid_job_code;
  55   grub_uint8_t stripe_width;
  56   grub_uint8_t total_volumes;
  57   grub_uint8_t original_width;
  58   grub_uint32_t raid_level;
  59   grub_uint32_t stripe_block_size;
  60   grub_uint32_t stripe_block_size_bytes;
  61   grub_uint32_t stripe_block_size_log2;
  62   grub_uint32_t stripe_mask;
  63   grub_uint32_t stripe_size;
  64   grub_uint32_t stripe_size_bytes;
  65   grub_uint32_t raid_job_mask;
  66   grub_uint32_t original_capacity;
  67   grub_uint32_t flags;
  68 };
  69
  70 #define NV_ID_LEN               8
  71 #define NV_ID_STRING            "NVIDIA"
  72 #define NV_VERSION              100
  73
  74 #define NV_PRODID_LEN           16
  75 #define NV_PRODREV_LEN          4
  76
  77 struct grub_nv_super
  78 {
  79   char vendor[NV_ID_LEN];       /* 0x00 - 0x07 ID string.  */
  80   grub_uint32_t size;           /* 0x08 - 0x0B Size of metadata in dwords.  */
  81   grub_uint32_t chksum;         /* 0x0C - 0x0F Checksum of this struct.  */
  82   grub_uint16_t version;        /* 0x10 - 0x11 NV version.  */
  83   grub_uint8_t unit_number;     /* 0x12 Disk index in array.  */
  84   grub_uint8_t reserved;        /* 0x13.  */
  85   grub_uint32_t capacity;       /* 0x14 - 0x17 Array capacity in sectors.  */
  86   grub_uint32_t sector_size;    /* 0x18 - 0x1B Sector size.  */
  87   char prodid[NV_PRODID_LEN];   /* 0x1C - 0x2B Array product ID.  */
  88   char prodrev[NV_PRODREV_LEN]; /* 0x2C - 0x2F Array product revision */
  89   grub_uint32_t unit_flags;     /* 0x30 - 0x33 Flags for this disk */
  90   struct grub_nv_array array;   /* Array information */
  91 } GRUB_PACKED;
  92
  93 static struct grub_diskfilter_vg *
  94 grub_dmraid_nv_detect (grub_disk_t disk,
  95                         struct grub_diskfilter_pv_id *id,
  96                         grub_disk_addr_t *start_sector)
  97 {
  98   grub_disk_addr_t sector;
  99   struct grub_nv_super sb;
 100   int level;
 101   grub_uint64_t disk_size;
 102   char *uuid;
 103
 104   if (disk->partition)
 105     /* Skip partition.  */
 106     return NULL;
 107
 108   sector = grub_disk_get_size (disk);
 109   if (sector == GRUB_DISK_SIZE_UNKNOWN)
 110     /* Not raid.  */
 111     return NULL;
 112   sector -= 2;
 113   if (grub_disk_read (disk, sector, 0, sizeof (sb), &sb))
 114     return NULL;
 115
 116   if (grub_memcmp (sb.vendor, NV_ID_STRING, 6))
 117     /* Not raid.  */
 118     return NULL;
 119
 120   if (sb.version != NV_VERSION)
 121     {
 122       grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
 123                   "unknown version: %d.%d", sb.version);
 124       return NULL;
 125     }
 126
 127   switch (sb.array.raid_level)
 128     {
 129     case NV_LEVEL_0:
 130       level = 0;
 131       disk_size = sb.capacity / sb.array.total_volumes;
 132       if (sb.array.total_volumes == 0)
 133         /* Not RAID.  */
 134         return NULL;
 135       break;
 136
 137     case NV_LEVEL_1:
 138       level = 1;
 139       disk_size = sb.capacity;
 140       break;
 141
 142     case NV_LEVEL_5:
 143       level = 5;
 144       disk_size = sb.capacity / (sb.array.total_volumes - 1);
 145       if (sb.array.total_volumes == 0 || sb.array.total_volumes == 1)
 146         /* Not RAID.  */
 147         return NULL;
 148       break;
 149
 150     default:
 151       grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
 152                   "unsupported RAID level: %d", sb.array.raid_level);
 153       return NULL;
 154     }
 155
 156   uuid = grub_malloc (sizeof (sb.array.signature));
 157   if (! uuid)
 158     return NULL;
 159
 160   grub_memcpy (uuid, (char *) &sb.array.signature,
 161                sizeof (sb.array.signature));
 162
 163   id->uuidlen = 0;
 164   id->id = sb.unit_number;
 165
 166   *start_sector = 0;
 167
 168   return grub_diskfilter_make_raid (sizeof (sb.array.signature),
 169                                     uuid, sb.array.total_volumes,
 170                                     NULL, disk_size,
 171                                     sb.array.stripe_block_size,
 172                                     GRUB_RAID_LAYOUT_LEFT_ASYMMETRIC,
 173                                     level);
 174 }
 175
 176 static struct grub_diskfilter grub_dmraid_nv_dev =
 177 {
 178   .name = "dmraid_nv",
 179   .detect = grub_dmraid_nv_detect,
 180   .next = 0
 181 };
 182
 183 GRUB_MOD_INIT(dm_nv)
 184 {
 185   grub_diskfilter_register_front (&grub_dmraid_nv_dev);
 186 }
 187
 188 GRUB_MOD_FINI(dm_nv)
 189 {
 190   grub_diskfilter_unregister (&grub_dmraid_nv_dev);
 191 }