diff options
Diffstat (limited to 'grub-core/disk/dmraid_nvidia.c')
| -rw-r--r-- | grub-core/disk/dmraid_nvidia.c | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/grub-core/disk/dmraid_nvidia.c b/grub-core/disk/dmraid_nvidia.c new file mode 100644 index 0000000..6372663 --- /dev/null +++ b/grub-core/disk/dmraid_nvidia.c @@ -0,0 +1,196 @@ +/* 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); +} |