9f27f9f691
Reported by: Andrei Borzenkov
196 lines
5.2 KiB
C
196 lines
5.2 KiB
C
/* dmraid_nvidia.c - module to handle Nvidia fakeraid. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2006,2007,2008,2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/dl.h>
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#include <grub/disk.h>
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#include <grub/mm.h>
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#include <grub/err.h>
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#include <grub/misc.h>
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#include <grub/diskfilter.h>
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GRUB_MOD_LICENSE ("GPLv3+");
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#define NV_SIGNATURES 4
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#define NV_IDLE 0
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#define NV_SCDB_INIT_RAID 2
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#define NV_SCDB_REBUILD_RAID 3
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#define NV_SCDB_UPGRADE_RAID 4
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#define NV_SCDB_SYNC_RAID 5
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#define NV_LEVEL_UNKNOWN 0x00
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#define NV_LEVEL_JBOD 0xFF
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#define NV_LEVEL_0 0x80
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#define NV_LEVEL_1 0x81
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#define NV_LEVEL_3 0x83
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#define NV_LEVEL_5 0x85
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#define NV_LEVEL_10 0x8a
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#define NV_LEVEL_1_0 0x8180
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#define NV_ARRAY_FLAG_BOOT 1 /* BIOS use only. */
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#define NV_ARRAY_FLAG_ERROR 2 /* Degraded or offline. */
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#define NV_ARRAY_FLAG_PARITY_VALID 4 /* RAID-3/5 parity valid. */
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struct grub_nv_array
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{
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grub_uint32_t version;
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grub_uint32_t signature[NV_SIGNATURES];
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grub_uint8_t raid_job_code;
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grub_uint8_t stripe_width;
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grub_uint8_t total_volumes;
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grub_uint8_t original_width;
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grub_uint32_t raid_level;
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grub_uint32_t stripe_block_size;
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grub_uint32_t stripe_block_size_bytes;
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grub_uint32_t stripe_block_size_log2;
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grub_uint32_t stripe_mask;
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grub_uint32_t stripe_size;
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grub_uint32_t stripe_size_bytes;
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grub_uint32_t raid_job_mask;
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grub_uint32_t original_capacity;
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grub_uint32_t flags;
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};
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#define NV_ID_LEN 8
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#define NV_ID_STRING "NVIDIA"
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#define NV_VERSION 100
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#define NV_PRODID_LEN 16
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#define NV_PRODREV_LEN 4
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struct grub_nv_super
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{
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char vendor[NV_ID_LEN]; /* 0x00 - 0x07 ID string. */
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grub_uint32_t size; /* 0x08 - 0x0B Size of metadata in dwords. */
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grub_uint32_t chksum; /* 0x0C - 0x0F Checksum of this struct. */
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grub_uint16_t version; /* 0x10 - 0x11 NV version. */
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grub_uint8_t unit_number; /* 0x12 Disk index in array. */
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grub_uint8_t reserved; /* 0x13. */
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grub_uint32_t capacity; /* 0x14 - 0x17 Array capacity in sectors. */
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grub_uint32_t sector_size; /* 0x18 - 0x1B Sector size. */
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char prodid[NV_PRODID_LEN]; /* 0x1C - 0x2B Array product ID. */
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char prodrev[NV_PRODREV_LEN]; /* 0x2C - 0x2F Array product revision */
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grub_uint32_t unit_flags; /* 0x30 - 0x33 Flags for this disk */
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struct grub_nv_array array; /* Array information */
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} GRUB_PACKED;
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static struct grub_diskfilter_vg *
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grub_dmraid_nv_detect (grub_disk_t disk,
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struct grub_diskfilter_pv_id *id,
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grub_disk_addr_t *start_sector)
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{
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grub_disk_addr_t sector;
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struct grub_nv_super sb;
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int level;
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grub_uint64_t disk_size;
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grub_uint32_t capacity;
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grub_uint8_t total_volumes;
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char *uuid;
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if (disk->partition)
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/* Skip partition. */
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return NULL;
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sector = grub_disk_get_size (disk);
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if (sector == GRUB_DISK_SIZE_UNKNOWN)
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/* Not raid. */
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return NULL;
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sector -= 2;
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if (grub_disk_read (disk, sector, 0, sizeof (sb), &sb))
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return NULL;
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if (grub_memcmp (sb.vendor, NV_ID_STRING, 6))
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/* Not raid. */
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return NULL;
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if (sb.version != NV_VERSION)
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{
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grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
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"unknown version: %d.%d", sb.version);
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return NULL;
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}
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capacity = grub_le_to_cpu32 (sb.capacity);
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total_volumes = sb.array.total_volumes;
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switch (sb.array.raid_level)
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{
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case NV_LEVEL_0:
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level = 0;
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if (total_volumes == 0)
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/* Not RAID. */
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return NULL;
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disk_size = capacity / total_volumes;
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break;
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case NV_LEVEL_1:
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level = 1;
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disk_size = sb.capacity;
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break;
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case NV_LEVEL_5:
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level = 5;
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if (total_volumes == 0 || total_volumes == 1)
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/* Not RAID. */
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return NULL;
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disk_size = capacity / (total_volumes - 1);
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break;
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default:
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grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
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"unsupported RAID level: %d", sb.array.raid_level);
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return NULL;
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}
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uuid = grub_malloc (sizeof (sb.array.signature));
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if (! uuid)
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return NULL;
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grub_memcpy (uuid, (char *) &sb.array.signature,
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sizeof (sb.array.signature));
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id->uuidlen = 0;
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id->id = sb.unit_number;
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*start_sector = 0;
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return grub_diskfilter_make_raid (sizeof (sb.array.signature),
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uuid, sb.array.total_volumes,
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"nv", disk_size,
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sb.array.stripe_block_size,
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GRUB_RAID_LAYOUT_LEFT_ASYMMETRIC,
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level);
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}
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static struct grub_diskfilter grub_dmraid_nv_dev =
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{
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.name = "dmraid_nv",
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.detect = grub_dmraid_nv_detect,
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.next = 0
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};
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GRUB_MOD_INIT(dm_nv)
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{
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grub_diskfilter_register_front (&grub_dmraid_nv_dev);
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}
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GRUB_MOD_FINI(dm_nv)
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{
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grub_diskfilter_unregister (&grub_dmraid_nv_dev);
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}
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