| 1 | /* $NetBSD: ata_raid_via.c,v 1.7 2014/03/25 16:19:13 christos Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 2000,2001,2002 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 | * 3. The name of the author may not be used to endorse or promote products |
| 17 | * derived from this software without specific prior written permission. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 20 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 21 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 22 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 23 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 24 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 25 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 26 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 27 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 28 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 | */ |
| 30 | |
| 31 | /* |
| 32 | * Support for parsing VIA V-RAID ATA RAID controller configuration blocks. |
| 33 | * |
| 34 | * Adapted to NetBSD by Tim Rightnour (garbled@netbsd.org) |
| 35 | */ |
| 36 | |
| 37 | #include <sys/cdefs.h> |
| 38 | __KERNEL_RCSID(0, "$NetBSD: ata_raid_via.c,v 1.7 2014/03/25 16:19:13 christos Exp $" ); |
| 39 | |
| 40 | #include <sys/param.h> |
| 41 | #include <sys/buf.h> |
| 42 | #include <sys/bufq.h> |
| 43 | #include <sys/conf.h> |
| 44 | #include <sys/device.h> |
| 45 | #include <sys/disk.h> |
| 46 | #include <sys/disklabel.h> |
| 47 | #include <sys/fcntl.h> |
| 48 | #include <sys/malloc.h> |
| 49 | #include <sys/vnode.h> |
| 50 | #include <sys/kauth.h> |
| 51 | |
| 52 | #include <miscfs/specfs/specdev.h> |
| 53 | |
| 54 | #include <dev/ata/atareg.h> |
| 55 | #include <dev/ata/atavar.h> |
| 56 | #include <dev/ata/wdvar.h> |
| 57 | |
| 58 | #include <dev/ata/ata_raidreg.h> |
| 59 | #include <dev/ata/ata_raidvar.h> |
| 60 | |
| 61 | #ifdef ATA_RAID_DEBUG |
| 62 | #define DPRINTF(x) printf x |
| 63 | #else |
| 64 | #define DPRINTF(x) /* nothing */ |
| 65 | #endif |
| 66 | |
| 67 | #ifdef ATA_RAID_DEBUG |
| 68 | static const char * |
| 69 | ata_raid_via_type(int type) |
| 70 | { |
| 71 | static char buffer[16]; |
| 72 | |
| 73 | switch (type) { |
| 74 | case VIA_T_RAID0: return "RAID0" ; |
| 75 | case VIA_T_RAID1: return "RAID1" ; |
| 76 | case VIA_T_RAID5: return "RAID5" ; |
| 77 | case VIA_T_RAID01: return "RAID0+1" ; |
| 78 | case VIA_T_SPAN: return "SPAN" ; |
| 79 | default: |
| 80 | snprintf(buffer, sizeof(buffer), "UNKNOWN 0x%02x" , type); |
| 81 | return buffer; |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | static void |
| 86 | ata_raid_via_print_info(struct via_raid_conf *info) |
| 87 | { |
| 88 | int i; |
| 89 | |
| 90 | printf("*************** ATA VIA Metadata ****************\n" ); |
| 91 | printf("magic 0x%02x\n" , info->magic); |
| 92 | printf("dummy_0 0x%02x\n" , info->dummy_0); |
| 93 | printf("type %s\n" , |
| 94 | ata_raid_via_type(info->type & VIA_T_MASK)); |
| 95 | printf("bootable %d\n" , info->type & VIA_T_BOOTABLE); |
| 96 | printf("unknown %d\n" , info->type & VIA_T_UNKNOWN); |
| 97 | printf("disk_index 0x%02x\n" , info->disk_index); |
| 98 | printf("stripe_layout 0x%02x\n" , info->stripe_layout); |
| 99 | printf(" stripe_disks %d\n" , info->stripe_layout & VIA_L_DISKS); |
| 100 | printf(" stripe_sectors %d\n" , |
| 101 | 0x08 << ((info->stripe_layout & VIA_L_MASK) >> VIA_L_SHIFT)); |
| 102 | printf("disk_sectors %ju\n" , info->disk_sectors); |
| 103 | printf("disk_id 0x%08x\n" , info->disk_id); |
| 104 | printf("DISK# disk_id\n" ); |
| 105 | for (i = 0; i < 8; i++) { |
| 106 | if (info->disks[i]) |
| 107 | printf(" %d 0x%08x\n" , i, info->disks[i]); |
| 108 | } |
| 109 | printf("checksum 0x%02x\n" , info->checksum); |
| 110 | printf("=================================================\n" ); |
| 111 | } |
| 112 | #endif |
| 113 | |
| 114 | int |
| 115 | ata_raid_read_config_via(struct wd_softc *sc) |
| 116 | { |
| 117 | struct via_raid_conf *info; |
| 118 | struct atabus_softc *atabus; |
| 119 | struct vnode *vp; |
| 120 | int bmajor, error; |
| 121 | dev_t dev; |
| 122 | uint32_t drive; |
| 123 | uint8_t checksum, checksum_alt, byte3, *ptr; |
| 124 | int count, disk; |
| 125 | struct ataraid_array_info *aai; |
| 126 | struct ataraid_disk_info *adi; |
| 127 | |
| 128 | info = malloc(sizeof(*info), M_DEVBUF, M_WAITOK); |
| 129 | |
| 130 | bmajor = devsw_name2blk(device_xname(sc->sc_dev), NULL, 0); |
| 131 | |
| 132 | /* Get a vnode for the raw partition of this disk. */ |
| 133 | dev = MAKEDISKDEV(bmajor, device_unit(sc->sc_dev), RAW_PART); |
| 134 | error = bdevvp(dev, &vp); |
| 135 | if (error) |
| 136 | goto out; |
| 137 | |
| 138 | error = VOP_OPEN(vp, FREAD, NOCRED); |
| 139 | if (error) { |
| 140 | vput(vp); |
| 141 | goto out; |
| 142 | } |
| 143 | |
| 144 | error = ata_raid_config_block_rw(vp, VIA_LBA(sc), info, |
| 145 | sizeof(*info), B_READ); |
| 146 | VOP_CLOSE(vp, FREAD, NOCRED); |
| 147 | vput(vp); |
| 148 | if (error) { |
| 149 | aprint_error_dev(sc->sc_dev, |
| 150 | "error %d reading VIA V-RAID config block\n" , error); |
| 151 | goto out; |
| 152 | } |
| 153 | |
| 154 | #ifdef ATA_RAID_DEBUG |
| 155 | ata_raid_via_print_info(info); |
| 156 | printf("MAGIC == 0x%02x\n" , info->magic); |
| 157 | #endif |
| 158 | |
| 159 | /* Check the signature. */ |
| 160 | if (info->magic != VIA_MAGIC) { |
| 161 | DPRINTF(("%s: VIA V-RAID signature check failed\n" , |
| 162 | device_xname(sc->sc_dev))); |
| 163 | error = ESRCH; |
| 164 | goto out; |
| 165 | } |
| 166 | |
| 167 | /* calculate checksum and compare for valid */ |
| 168 | for (byte3 = 0, checksum = 0, ptr = (uint8_t *)info, count = 0; |
| 169 | count < 50; count++) |
| 170 | if (count == 3) |
| 171 | byte3 = *ptr++; |
| 172 | else |
| 173 | checksum += *ptr++; |
| 174 | checksum_alt = checksum + (byte3 & ~VIA_T_BOOTABLE); |
| 175 | checksum += byte3; |
| 176 | if (checksum != info->checksum && checksum_alt != info->checksum) { |
| 177 | DPRINTF(("%s: VIA V-RAID checksum failed 0x%02x != " |
| 178 | "0x%02x or 0x%02x\n" , device_xname(sc->sc_dev), |
| 179 | info->checksum, checksum, checksum_alt)); |
| 180 | error = ESRCH; |
| 181 | goto out; |
| 182 | } |
| 183 | |
| 184 | /* |
| 185 | * Lookup or allocate a new array info structure for |
| 186 | * this array. Use the serial number of disk0 as the array# |
| 187 | */ |
| 188 | aai = ata_raid_get_array_info(ATA_RAID_TYPE_VIA, info->disks[0]); |
| 189 | |
| 190 | aai->aai_status = AAI_S_READY; |
| 191 | |
| 192 | switch (info->type & VIA_T_MASK) { |
| 193 | case VIA_T_RAID0: |
| 194 | aai->aai_level = AAI_L_RAID0; |
| 195 | aai->aai_width = info->stripe_layout & VIA_L_DISKS; |
| 196 | aai->aai_capacity = aai->aai_width * info->disk_sectors; |
| 197 | break; |
| 198 | |
| 199 | case VIA_T_RAID1: |
| 200 | aai->aai_level = AAI_L_RAID1; |
| 201 | aai->aai_width = 1; |
| 202 | aai->aai_capacity = aai->aai_width * info->disk_sectors; |
| 203 | break; |
| 204 | |
| 205 | case VIA_T_RAID5: |
| 206 | aai->aai_level = AAI_L_RAID5; |
| 207 | aai->aai_width = info->stripe_layout & VIA_L_DISKS; |
| 208 | aai->aai_capacity = (aai->aai_width - 1) * info->disk_sectors; |
| 209 | break; |
| 210 | |
| 211 | case VIA_T_SPAN: |
| 212 | aai->aai_level = AAI_L_SPAN; |
| 213 | aai->aai_width = 1; |
| 214 | aai->aai_capacity += info->disk_sectors; /* XXX ??? */ |
| 215 | break; |
| 216 | |
| 217 | default: |
| 218 | aprint_error_dev(sc->sc_dev, |
| 219 | "unknown VIA V-RAID type 0x%02x\n" , info->type); |
| 220 | error = EINVAL; |
| 221 | goto out; |
| 222 | } |
| 223 | |
| 224 | aai->aai_type = ATA_RAID_TYPE_VIA; |
| 225 | for (count = 0, disk = 0; disk < 8; disk++) |
| 226 | if (info->disks[disk]) |
| 227 | count++; |
| 228 | aai->aai_interleave = |
| 229 | 0x08 << ((info->stripe_layout & VIA_L_MASK) >> VIA_L_SHIFT); |
| 230 | aai->aai_ndisks = count; |
| 231 | aai->aai_heads = 255; |
| 232 | aai->aai_sectors = 63; |
| 233 | aai->aai_cylinders = aai->aai_capacity / (63 * 255); |
| 234 | aai->aai_offset = 0; |
| 235 | aai->aai_reserved = 1; |
| 236 | |
| 237 | /* XXX - bogus. RAID1 shouldn't really have an interleave */ |
| 238 | if (aai->aai_interleave == 0) |
| 239 | aai->aai_interleave = aai->aai_capacity; |
| 240 | |
| 241 | atabus = device_private(device_parent(sc->sc_dev)); |
| 242 | drive = atabus->sc_chan->ch_channel; |
| 243 | if (drive >= aai->aai_ndisks) { |
| 244 | aprint_error_dev(sc->sc_dev, |
| 245 | "drive number %d doesn't make sense within %d-disk " |
| 246 | "array\n" , drive, aai->aai_ndisks); |
| 247 | error = EINVAL; |
| 248 | goto out; |
| 249 | } |
| 250 | |
| 251 | adi = &aai->aai_disks[drive]; |
| 252 | adi->adi_dev = sc->sc_dev; |
| 253 | adi->adi_status = ADI_S_ONLINE | ADI_S_ASSIGNED; |
| 254 | adi->adi_sectors = aai->aai_capacity; |
| 255 | adi->adi_compsize = info->disk_sectors; |
| 256 | |
| 257 | error = 0; |
| 258 | |
| 259 | out: |
| 260 | free(info, M_DEVBUF); |
| 261 | return (error); |
| 262 | } |
| 263 | |