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NetBSD/sys/dev/ata/ata_raid_intel.c

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/* $NetBSD: ata_raid_intel.c,v 1.10 2019/10/04 12:24:32 mrg Exp $ */
/*-
* Copyright (c) 2000-2008 Søren Schmidt <sos@FreeBSD.org>
* 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.
*
* 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 Intel MatrixRAID controller configuration blocks.
*
* Adapted to NetBSD by Juan Romero Pardines (xtraeme@gmail.org).
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ata_raid_intel.c,v 1.10 2019/10/04 12:24:32 mrg Exp $");
#include <sys/param.h>
#include <sys/buf.h>
#include <sys/bufq.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/disk.h>
#include <sys/disklabel.h>
#include <sys/fcntl.h>
#include <sys/vnode.h>
#include <sys/kauth.h>
#include <miscfs/specfs/specdev.h>
#include <dev/ata/atareg.h>
#include <dev/ata/atavar.h>
#include <dev/ata/wdvar.h>
#include <dev/ata/ata_raidreg.h>
#include <dev/ata/ata_raidvar.h>
#ifdef ATA_RAID_DEBUG
#define DPRINTF(x) printf x
#else
#define DPRINTF(x) /* nothing */
#endif
static int find_volume_id(struct intel_raid_conf *);
#ifdef ATA_RAID_DEBUG
static const char *
ata_raid_intel_type(int type)
{
static char buffer[16];
switch (type) {
case INTEL_T_RAID0:
return "RAID0";
case INTEL_T_RAID1:
return "RAID1";
case INTEL_T_RAID5:
return "RAID5";
default:
snprintf(buffer, sizeof(buffer), "UNKNOWN 0x%02x", type);
return buffer;
}
}
static void
ata_raid_intel_print_info(struct intel_raid_conf *info)
{
struct intel_raid_mapping *map;
int i, j;
printf("********* ATA Intel MatrixRAID Metadata *********\n");
printf("intel_id <%.24s>\n", info->intel_id);
printf("version <%.6s>\n", info->version);
printf("checksum 0x%08x\n", info->checksum);
printf("config_size 0x%08x\n", info->config_size);
printf("config_id 0x%08x\n", info->config_id);
printf("generation 0x%08x\n", info->generation);
printf("total_disks %u\n", info->total_disks);
printf("total_volumes %u\n", info->total_volumes);
printf("DISK# serial disk sectors disk_id flags\n");
for (i = 0; i < info->total_disks; i++) {
printf(" %d <%.16s> %u 0x%08x 0x%08x\n",
i, info->disk[i].serial, info->disk[i].sectors,
info->disk[i].id, info->disk[i].flags);
}
map = (struct intel_raid_mapping *)&info->disk[info->total_disks];
for (j = 0; j < info->total_volumes; j++) {
printf("name %.16s\n", map->name);
printf("total_sectors %ju\n", map->total_sectors);
printf("state %u\n", map->state);
printf("reserved %u\n", map->reserved);
printf("offset %u\n", map->offset);
printf("disk_sectors %u\n", map->disk_sectors);
printf("stripe_count %u\n", map->stripe_count);
printf("stripe_sectors %u\n", map->stripe_sectors);
printf("status %u\n", map->status);
printf("type %s\n", ata_raid_intel_type(map->type));
printf("total_disks %u\n", map->total_disks);
printf("magic[0] 0x%02x\n", map->magic[0]);
printf("magic[1] 0x%02x\n", map->magic[1]);
printf("magic[2] 0x%02x\n", map->magic[2]);
for (i = 0; i < map->total_disks; i++)
printf(" disk %d at disk_idx 0x%08x\n",
i, map->disk_idx[i]);
map = (struct intel_raid_mapping *)
&map->disk_idx[map->total_disks];
}
printf("=================================================\n");
}
#endif
int
ata_raid_read_config_intel(struct wd_softc *sc)
{
struct dk_softc *dksc = &sc->sc_dksc;
struct intel_raid_conf *info;
const size_t infosz = 1536;
struct intel_raid_mapping *map;
struct ataraid_array_info *aai;
struct ataraid_disk_info *adi;
struct vnode *vp;
uint32_t checksum, *ptr;
int bmajor, count, curvol = 0, error = 0;
char *tmp;
dev_t dev;
int volumeid, diskidx;
info = kmem_zalloc(infosz, KM_SLEEP);
bmajor = devsw_name2blk(dksc->sc_xname, NULL, 0);
/* Get a vnode for the raw partition of this disk. */
dev = MAKEDISKDEV(bmajor, device_unit(dksc->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, INTEL_LBA(sc), info,
1024, B_READ);
VOP_CLOSE(vp, FREAD, NOCRED);
vput(vp);
if (error) {
DPRINTF(("%s: error %d reading Intel MatrixRAID config block\n",
dksc->sc_xname, error));
goto out;
}
tmp = (char *)info;
(void)memcpy(tmp + 1024, tmp, 512);
(void)memmove(tmp, tmp + 512, 1024);
(void)memset(tmp + 1024, 0, 512);
/* Check if this is a Intel RAID struct */
if (strncmp(info->intel_id, INTEL_MAGIC, strlen(INTEL_MAGIC))) {
DPRINTF(("%s: Intel MatrixRAID signature check failed\n",
dksc->sc_xname));
error = ESRCH;
goto out;
}
/* calculate checksum and compare for valid */
for (checksum = 0, ptr = (uint32_t *)info, count = 0;
count < (info->config_size / sizeof(uint32_t)); count++)
checksum += *ptr++;
checksum -= info->checksum;
if (checksum != info->checksum) {
DPRINTF(("%s: Intel MatrixRAID checksum failed 0x%x != 0x%x\n",
dksc->sc_xname, checksum, info->checksum));
error = ESRCH;
goto out;
}
#ifdef ATA_RAID_DEBUG
ata_raid_intel_print_info(info);
#endif
/* This one points to the first volume */
map = (struct intel_raid_mapping *)&info->disk[info->total_disks];
volumeid = find_volume_id(info);
if (volumeid < 0) {
aprint_error_dev(dksc->sc_dev,
"too many RAID arrays\n");
error = ENOMEM;
goto out;
}
findvol:
/*
* Lookup or allocate a new array info structure for this array.
*/
aai = ata_raid_get_array_info(ATA_RAID_TYPE_INTEL, volumeid + curvol);
/* Fill in array info */
aai->aai_generation = info->generation;
aai->aai_status = AAI_S_READY;
switch (map->type) {
case INTEL_T_RAID0:
aai->aai_level = AAI_L_RAID0;
aai->aai_width = map->total_disks;
break;
case INTEL_T_RAID1:
aai->aai_level = AAI_L_RAID1;
aai->aai_width = 1;
break;
default:
DPRINTF(("%s: unknown Intel MatrixRAID type 0x%02x\n",
dksc->sc_xname, map->type));
error = EINVAL;
goto out;
}
switch (map->state) {
case INTEL_S_DEGRADED:
aai->aai_status |= AAI_S_DEGRADED;
break;
case INTEL_S_DISABLED:
case INTEL_S_FAILURE:
aai->aai_status &= ~AAI_S_READY;
break;
}
aai->aai_type = ATA_RAID_TYPE_INTEL;
aai->aai_capacity = map->total_sectors;
aai->aai_interleave = map->stripe_sectors;
aai->aai_ndisks = map->total_disks;
aai->aai_heads = 255;
aai->aai_sectors = 63;
aai->aai_cylinders =
aai->aai_capacity / (aai->aai_heads * aai->aai_sectors);
aai->aai_offset = map->offset;
aai->aai_reserved = 3;
if (map->name)
strlcpy(aai->aai_name, map->name, sizeof(aai->aai_name));
/* Fill in disk info */
diskidx = aai->aai_curdisk++;
adi = &aai->aai_disks[diskidx];
adi->adi_status = 0;
if (info->disk[diskidx].flags & INTEL_F_ONLINE)
adi->adi_status |= ADI_S_ONLINE;
if (info->disk[diskidx].flags & INTEL_F_ASSIGNED)
adi->adi_status |= ADI_S_ASSIGNED;
if (info->disk[diskidx].flags & INTEL_F_SPARE) {
adi->adi_status &= ~ADI_S_ONLINE;
adi->adi_status |= ADI_S_SPARE;
}
if (info->disk[diskidx].flags & INTEL_F_DOWN)
adi->adi_status &= ~ADI_S_ONLINE;
if (adi->adi_status) {
adi->adi_dev = dksc->sc_dev;
adi->adi_sectors = info->disk[diskidx].sectors;
adi->adi_compsize = adi->adi_sectors - aai->aai_reserved;
/*
* Check if that is the only volume, otherwise repeat
* the process to find more.
*/
if ((curvol + 1) < info->total_volumes) {
curvol++;
map = (struct intel_raid_mapping *)
&map->disk_idx[map->total_disks];
goto findvol;
}
}
out:
kmem_free(info, infosz);
return error;
}
/*
* Assign `volume id' to RAID volumes.
*/
static struct {
/* We assume disks are on the same array if these three values
are same. */
uint32_t config_id;
uint32_t generation;
uint32_t checksum;
int id;
} array_note[10]; /* XXX: this array is not used after ld_ataraid is
* configured. */
static int n_array = 0;
static int volume_id = 0;
static int
find_volume_id(struct intel_raid_conf *info)
{
int i, ret;
for (i=0; i < n_array; ++i) {
if (info->checksum == array_note[i].checksum &&
info->config_id == array_note[i].config_id &&
info->generation == array_note[i].generation) {
/* we have already seen this array */
return array_note[i].id;
}
}
if (n_array >= __arraycount(array_note)) {
/* Too many arrays */
return -1;
}
array_note[n_array].checksum = info->checksum;
array_note[n_array].config_id = info->config_id;
array_note[n_array].generation = info->generation;
array_note[n_array].id = ret = volume_id;
/* Allocate volume ids for all volumes in this array */
volume_id += info->total_volumes;
++n_array;
return ret;
}
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