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 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 1.7 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