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/* dmraid_nvidia.c - module to handle Nvidia fakeraid. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2006,2007,2008,2009 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/dl.h>
#include <grub/disk.h>
#include <grub/mm.h>
#include <grub/err.h>
#include <grub/misc.h>
#include <grub/diskfilter.h>
GRUB_MOD_LICENSE ("GPLv3+");
#define NV_SIGNATURES 4
#define NV_IDLE 0
#define NV_SCDB_INIT_RAID 2
#define NV_SCDB_REBUILD_RAID 3
#define NV_SCDB_UPGRADE_RAID 4
#define NV_SCDB_SYNC_RAID 5
#define NV_LEVEL_UNKNOWN 0x00
#define NV_LEVEL_JBOD 0xFF
#define NV_LEVEL_0 0x80
#define NV_LEVEL_1 0x81
#define NV_LEVEL_3 0x83
#define NV_LEVEL_5 0x85
#define NV_LEVEL_10 0x8a
#define NV_LEVEL_1_0 0x8180
#define NV_ARRAY_FLAG_BOOT 1 /* BIOS use only. */
#define NV_ARRAY_FLAG_ERROR 2 /* Degraded or offline. */
#define NV_ARRAY_FLAG_PARITY_VALID 4 /* RAID-3/5 parity valid. */
struct grub_nv_array
{
grub_uint32_t version;
grub_uint32_t signature[NV_SIGNATURES];
grub_uint8_t raid_job_code;
grub_uint8_t stripe_width;
grub_uint8_t total_volumes;
grub_uint8_t original_width;
grub_uint32_t raid_level;
grub_uint32_t stripe_block_size;
grub_uint32_t stripe_block_size_bytes;
grub_uint32_t stripe_block_size_log2;
grub_uint32_t stripe_mask;
grub_uint32_t stripe_size;
grub_uint32_t stripe_size_bytes;
grub_uint32_t raid_job_mask;
grub_uint32_t original_capacity;
grub_uint32_t flags;
};
#define NV_ID_LEN 8
#define NV_ID_STRING "NVIDIA"
#define NV_VERSION 100
#define NV_PRODID_LEN 16
#define NV_PRODREV_LEN 4
struct grub_nv_super
{
char vendor[NV_ID_LEN]; /* 0x00 - 0x07 ID string. */
grub_uint32_t size; /* 0x08 - 0x0B Size of metadata in dwords. */
grub_uint32_t chksum; /* 0x0C - 0x0F Checksum of this struct. */
grub_uint16_t version; /* 0x10 - 0x11 NV version. */
grub_uint8_t unit_number; /* 0x12 Disk index in array. */
grub_uint8_t reserved; /* 0x13. */
grub_uint32_t capacity; /* 0x14 - 0x17 Array capacity in sectors. */
grub_uint32_t sector_size; /* 0x18 - 0x1B Sector size. */
char prodid[NV_PRODID_LEN]; /* 0x1C - 0x2B Array product ID. */
char prodrev[NV_PRODREV_LEN]; /* 0x2C - 0x2F Array product revision */
grub_uint32_t unit_flags; /* 0x30 - 0x33 Flags for this disk */
struct grub_nv_array array; /* Array information */
} GRUB_PACKED;
static struct grub_diskfilter_vg *
grub_dmraid_nv_detect (grub_disk_t disk,
struct grub_diskfilter_pv_id *id,
grub_disk_addr_t *start_sector)
{
grub_disk_addr_t sector;
struct grub_nv_super sb;
int level;
grub_uint64_t disk_size;
grub_uint32_t capacity;
grub_uint8_t total_volumes;
char *uuid;
if (disk->partition)
/* Skip partition. */
return NULL;
sector = grub_disk_native_sectors (disk);
if (sector == GRUB_DISK_SIZE_UNKNOWN)
/* Not raid. */
return NULL;
sector -= 2;
if (grub_disk_read (disk, sector, 0, sizeof (sb), &sb))
return NULL;
if (grub_memcmp (sb.vendor, NV_ID_STRING, 6))
/* Not raid. */
return NULL;
if (sb.version != NV_VERSION)
{
grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
"unknown version: %d.%d", sb.version >> 8, sb.version & 0xFF);
return NULL;
}
capacity = grub_le_to_cpu32 (sb.capacity);
total_volumes = sb.array.total_volumes;
switch (sb.array.raid_level)
{
case NV_LEVEL_0:
level = 0;
if (total_volumes == 0)
/* Not RAID. */
return NULL;
disk_size = capacity / total_volumes;
break;
case NV_LEVEL_1:
level = 1;
disk_size = sb.capacity;
break;
case NV_LEVEL_5:
level = 5;
if (total_volumes == 0 || total_volumes == 1)
/* Not RAID. */
return NULL;
disk_size = capacity / (total_volumes - 1);
break;
default:
grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
"unsupported RAID level: %d", sb.array.raid_level);
return NULL;
}
uuid = grub_malloc (sizeof (sb.array.signature));
if (! uuid)
return NULL;
grub_memcpy (uuid, (char *) &sb.array.signature,
sizeof (sb.array.signature));
id->uuidlen = 0;
id->id = sb.unit_number;
*start_sector = 0;
return grub_diskfilter_make_raid (sizeof (sb.array.signature),
uuid, sb.array.total_volumes,
"nv", disk_size,
sb.array.stripe_block_size,
GRUB_RAID_LAYOUT_LEFT_ASYMMETRIC,
level);
}
static struct grub_diskfilter grub_dmraid_nv_dev =
{
.name = "dmraid_nv",
.detect = grub_dmraid_nv_detect,
.next = 0
};
GRUB_MOD_INIT(dm_nv)
{
grub_diskfilter_register_front (&grub_dmraid_nv_dev);
}
GRUB_MOD_FINI(dm_nv)
{
grub_diskfilter_unregister (&grub_dmraid_nv_dev);
}
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