/* $NetBSD: ata_raid_via.c,v 1.7 2014/03/25 16:19:13 christos Exp $ */ /*- * Copyright (c) 2000,2001,2002 Søren Schmidt * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer, * without modification, immediately at the beginning of the file. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * Support for parsing VIA V-RAID ATA RAID controller configuration blocks. * * Adapted to NetBSD by Tim Rightnour (garbled@netbsd.org) */ #include __KERNEL_RCSID(0, "$NetBSD: ata_raid_via.c,v 1.7 2014/03/25 16:19:13 christos Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef ATA_RAID_DEBUG #define DPRINTF(x) printf x #else #define DPRINTF(x) /* nothing */ #endif #ifdef ATA_RAID_DEBUG static const char * ata_raid_via_type(int type) { static char buffer[16]; switch (type) { case VIA_T_RAID0: return "RAID0"; case VIA_T_RAID1: return "RAID1"; case VIA_T_RAID5: return "RAID5"; case VIA_T_RAID01: return "RAID0+1"; case VIA_T_SPAN: return "SPAN"; default: snprintf(buffer, sizeof(buffer), "UNKNOWN 0x%02x", type); return buffer; } } static void ata_raid_via_print_info(struct via_raid_conf *info) { int i; printf("*************** ATA VIA Metadata ****************\n"); printf("magic 0x%02x\n", info->magic); printf("dummy_0 0x%02x\n", info->dummy_0); printf("type %s\n", ata_raid_via_type(info->type & VIA_T_MASK)); printf("bootable %d\n", info->type & VIA_T_BOOTABLE); printf("unknown %d\n", info->type & VIA_T_UNKNOWN); printf("disk_index 0x%02x\n", info->disk_index); printf("stripe_layout 0x%02x\n", info->stripe_layout); printf(" stripe_disks %d\n", info->stripe_layout & VIA_L_DISKS); printf(" stripe_sectors %d\n", 0x08 << ((info->stripe_layout & VIA_L_MASK) >> VIA_L_SHIFT)); printf("disk_sectors %ju\n", info->disk_sectors); printf("disk_id 0x%08x\n", info->disk_id); printf("DISK# disk_id\n"); for (i = 0; i < 8; i++) { if (info->disks[i]) printf(" %d 0x%08x\n", i, info->disks[i]); } printf("checksum 0x%02x\n", info->checksum); printf("=================================================\n"); } #endif int ata_raid_read_config_via(struct wd_softc *sc) { struct via_raid_conf *info; struct atabus_softc *atabus; struct vnode *vp; int bmajor, error; dev_t dev; uint32_t drive; uint8_t checksum, checksum_alt, byte3, *ptr; int count, disk; struct ataraid_array_info *aai; struct ataraid_disk_info *adi; info = malloc(sizeof(*info), M_DEVBUF, M_WAITOK); bmajor = devsw_name2blk(device_xname(sc->sc_dev), NULL, 0); /* Get a vnode for the raw partition of this disk. */ dev = MAKEDISKDEV(bmajor, device_unit(sc->sc_dev), RAW_PART); error = bdevvp(dev, &vp); if (error) goto out; error = VOP_OPEN(vp, FREAD, NOCRED); if (error) { vput(vp); goto out; } error = ata_raid_config_block_rw(vp, VIA_LBA(sc), info, sizeof(*info), B_READ); VOP_CLOSE(vp, FREAD, NOCRED); vput(vp); if (error) { aprint_error_dev(sc->sc_dev, "error %d reading VIA V-RAID config block\n", error); goto out; } #ifdef ATA_RAID_DEBUG ata_raid_via_print_info(info); printf("MAGIC == 0x%02x\n", info->magic); #endif /* Check the signature. */ if (info->magic != VIA_MAGIC) { DPRINTF(("%s: VIA V-RAID signature check failed\n", device_xname(sc->sc_dev))); error = ESRCH; goto out; } /* calculate checksum and compare for valid */ for (byte3 = 0, checksum = 0, ptr = (uint8_t *)info, count = 0; count < 50; count++) if (count == 3) byte3 = *ptr++; else checksum += *ptr++; checksum_alt = checksum + (byte3 & ~VIA_T_BOOTABLE); checksum += byte3; if (checksum != info->checksum && checksum_alt != info->checksum) { DPRINTF(("%s: VIA V-RAID checksum failed 0x%02x != " "0x%02x or 0x%02x\n", device_xname(sc->sc_dev), info->checksum, checksum, checksum_alt)); error = ESRCH; goto out; } /* * Lookup or allocate a new array info structure for * this array. Use the serial number of disk0 as the array# */ aai = ata_raid_get_array_info(ATA_RAID_TYPE_VIA, info->disks[0]); aai->aai_status = AAI_S_READY; switch (info->type & VIA_T_MASK) { case VIA_T_RAID0: aai->aai_level = AAI_L_RAID0; aai->aai_width = info->stripe_layout & VIA_L_DISKS; aai->aai_capacity = aai->aai_width * info->disk_sectors; break; case VIA_T_RAID1: aai->aai_level = AAI_L_RAID1; aai->aai_width = 1; aai->aai_capacity = aai->aai_width * info->disk_sectors; break; case VIA_T_RAID5: aai->aai_level = AAI_L_RAID5; aai->aai_width = info->stripe_layout & VIA_L_DISKS; aai->aai_capacity = (aai->aai_width - 1) * info->disk_sectors; break; case VIA_T_SPAN: aai->aai_level = AAI_L_SPAN; aai->aai_width = 1; aai->aai_capacity += info->disk_sectors; /* XXX ??? */ break; default: aprint_error_dev(sc->sc_dev, "unknown VIA V-RAID type 0x%02x\n", info->type); error = EINVAL; goto out; } aai->aai_type = ATA_RAID_TYPE_VIA; for (count = 0, disk = 0; disk < 8; disk++) if (info->disks[disk]) count++; aai->aai_interleave = 0x08 << ((info->stripe_layout & VIA_L_MASK) >> VIA_L_SHIFT); aai->aai_ndisks = count; aai->aai_heads = 255; aai->aai_sectors = 63; aai->aai_cylinders = aai->aai_capacity / (63 * 255); aai->aai_offset = 0; aai->aai_reserved = 1; /* XXX - bogus. RAID1 shouldn't really have an interleave */ if (aai->aai_interleave == 0) aai->aai_interleave = aai->aai_capacity; atabus = device_private(device_parent(sc->sc_dev)); drive = atabus->sc_chan->ch_channel; if (drive >= aai->aai_ndisks) { aprint_error_dev(sc->sc_dev, "drive number %d doesn't make sense within %d-disk " "array\n", drive, aai->aai_ndisks); error = EINVAL; goto out; } adi = &aai->aai_disks[drive]; adi->adi_dev = sc->sc_dev; adi->adi_status = ADI_S_ONLINE | ADI_S_ASSIGNED; adi->adi_sectors = aai->aai_capacity; adi->adi_compsize = info->disk_sectors; error = 0; out: free(info, M_DEVBUF); return (error); }