1 /* $NetBSD: ata_raid_via.c,v 1.2 2007/11/26 19:01:36 pooka Exp $ */ 2 3 /*- 4 * Copyright (c) 2000,2001,2002 S�ren 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 1.2 2007/11/26 19:01:36 pooka 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 sprintf(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, *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(sc->sc_dev.dv_xname, 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 vput(vp); 147 if (error) { 148 printf("%s: error %d reading VIA V-RAID config block\n", 149 sc->sc_dev.dv_xname, error); 150 goto out; 151 } 152 153 #ifdef ATA_RAID_DEBUG 154 ata_raid_via_print_info(info); 155 #endif 156 157 printf("MAGIC == 0x%02x\n", info->magic); 158 /* Check the signature. */ 159 if (info->magic != VIA_MAGIC) { 160 DPRINTF(("%s: VIA V-RAID signature check failed\n", 161 sc->sc_dev.dv_xname)); 162 error = ESRCH; 163 goto out; 164 } 165 166 /* calculate checksum and compare for valid */ 167 for (checksum = 0, ptr = (uint8_t *)info, count = 0; count < 50; 168 count++) 169 if (count == 3) 170 checksum += *ptr++ & ~ VIA_T_BOOTABLE; 171 else 172 checksum += *ptr++; 173 if (checksum != info->checksum) { 174 DPRINTF(("%s: VIA V-RAID checksum failed 0x%02x != 0x%02x\n", 175 sc->sc_dev.dv_xname, checksum, info->checksum)); 176 error = ESRCH; 177 goto out; 178 } 179 180 /* 181 * Lookup or allocate a new array info structure for 182 * this array. Use the serial number of disk0 as the array# 183 */ 184 aai = ata_raid_get_array_info(ATA_RAID_TYPE_VIA, info->disks[0]); 185 186 aai->aai_status = AAI_S_READY; 187 188 switch (info->type & VIA_T_MASK) { 189 case VIA_T_RAID0: 190 aai->aai_level = AAI_L_RAID0; 191 aai->aai_width = info->stripe_layout & VIA_L_DISKS; 192 aai->aai_capacity = aai->aai_width * info->disk_sectors; 193 break; 194 195 case VIA_T_RAID1: 196 aai->aai_level = AAI_L_RAID1; 197 aai->aai_width = 1; 198 aai->aai_capacity = aai->aai_width * info->disk_sectors; 199 break; 200 201 case VIA_T_RAID5: 202 aai->aai_level = AAI_L_RAID5; 203 aai->aai_width = info->stripe_layout & VIA_L_DISKS; 204 aai->aai_capacity = (aai->aai_width - 1) * info->disk_sectors; 205 break; 206 207 case VIA_T_SPAN: 208 aai->aai_level = AAI_L_SPAN; 209 aai->aai_width = 1; 210 aai->aai_capacity += info->disk_sectors; /* XXX ??? */ 211 break; 212 213 default: 214 aprint_error("%s: unknown VIA V-RAID type 0x%02x\n", 215 sc->sc_dev.dv_xname, info->type); 216 error = EINVAL; 217 goto out; 218 } 219 220 aai->aai_type = ATA_RAID_TYPE_VIA; 221 for (count = 0, disk = 0; disk < 8; disk++) 222 if (info->disks[disk]) 223 count++; 224 aai->aai_interleave = 225 0x08 << ((info->stripe_layout & VIA_L_MASK) >> VIA_L_SHIFT); 226 aai->aai_ndisks = count; 227 aai->aai_heads = 255; 228 aai->aai_sectors = 63; 229 aai->aai_cylinders = aai->aai_capacity / (63 * 255); 230 aai->aai_offset = 0; 231 aai->aai_reserved = 1; 232 233 /* XXX - bogus. RAID1 shouldn't really have an interleave */ 234 if (aai->aai_interleave == 0) 235 aai->aai_interleave = aai->aai_capacity; 236 237 atabus = (struct atabus_softc *) device_parent(&sc->sc_dev); 238 drive = atabus->sc_chan->ch_channel; 239 if (drive >= aai->aai_ndisks) { 240 aprint_error("%s: drive number %d doesn't make sense within " 241 "%d-disk array\n", 242 sc->sc_dev.dv_xname, drive, aai->aai_ndisks); 243 error = EINVAL; 244 goto out; 245 } 246 247 adi = &aai->aai_disks[drive]; 248 adi->adi_dev = &sc->sc_dev; 249 adi->adi_status = ADI_S_ONLINE | ADI_S_ASSIGNED; 250 adi->adi_sectors = aai->aai_capacity; 251 adi->adi_compsize = info->disk_sectors; 252 253 error = 0; 254 255 out: 256 free(info, M_DEVBUF); 257 return (error); 258 } 259