NetBSD-5.0.2/sys/dev/ata/ata_raid.c
/* $NetBSD: ata_raid.c,v 1.32 2008/09/11 11:08:50 tron Exp $ */
/*
* Copyright (c) 2003 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* 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.
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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 autoconfiguration of RAID sets on ATA RAID controllers.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ata_raid.c,v 1.32 2008/09/11 11:08:50 tron 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/malloc.h>
#include <sys/vnode.h>
#include <sys/proc.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>
#include "locators.h"
#ifdef ATA_RAID_DEBUG
#define DPRINTF(x) printf x
#else
#define DPRINTF(x) /* nothing */
#endif
void ataraidattach(int);
static int ataraid_match(device_t, cfdata_t, void *);
static void ataraid_attach(device_t, device_t, void *);
static int ataraid_print(void *, const char *);
static int ata_raid_finalize(device_t );
ataraid_array_info_list_t ataraid_array_info_list =
TAILQ_HEAD_INITIALIZER(ataraid_array_info_list);
u_int ataraid_array_info_count;
CFATTACH_DECL_NEW(ataraid, 0,
ataraid_match, ataraid_attach, NULL, NULL);
/*
* ataraidattach:
*
* Pseudo-device attach routine.
*/
void
ataraidattach(int count)
{
/*
* Register a finalizer which will be used to actually configure
* the logical disks configured by ataraid.
*/
if (config_finalize_register(NULL, ata_raid_finalize) != 0)
printf("WARNING: unable to register ATA RAID finalizer\n");
}
/*
* ata_raid_type_name:
*
* Return the type of ATA RAID.
*/
const char *
ata_raid_type_name(u_int type)
{
static const char *ata_raid_type_names[] = {
"Promise",
"Adaptec",
"VIA V-RAID",
"nVidia",
"JMicron",
"Intel MatrixRAID"
};
if (type < __arraycount(ata_raid_type_names))
return (ata_raid_type_names[type]);
return (NULL);
}
/*
* ata_raid_finalize:
*
* Autoconfiguration finalizer for ATA RAID.
*/
static int
ata_raid_finalize(device_t self)
{
static struct cfdata ataraid_cfdata = {
.cf_name = "ataraid",
.cf_atname = "ataraid",
.cf_unit = 0,
.cf_fstate = FSTATE_STAR,
};
extern struct cfdriver ataraid_cd;
static int done_once;
int error;
/*
* Since we only handle real hardware, we only need to be
* called once.
*/
if (done_once)
return (0);
done_once = 1;
if (TAILQ_EMPTY(&ataraid_array_info_list))
goto out;
error = config_cfattach_attach(ataraid_cd.cd_name, &ataraid_ca);
if (error) {
printf("%s: unable to register cfattach, error = %d\n",
ataraid_cd.cd_name, error);
(void) config_cfdriver_detach(&ataraid_cd);
goto out;
}
if (config_attach_pseudo(&ataraid_cfdata) == NULL)
printf("%s: unable to attach an instance\n",
ataraid_cd.cd_name);
out:
return (1);
}
/*
* ataraid_match:
*
* Autoconfiguration glue: match routine.
*/
static int
ataraid_match(device_t parent, cfdata_t cf,
void *aux)
{
/* pseudo-device; always present */
return (1);
}
/*
* ataraid_attach:
*
* Autoconfiguration glue: attach routine. We attach the children.
*/
static void
ataraid_attach(device_t parent, device_t self,
void *aux)
{
struct ataraid_array_info *aai;
int locs[ATARAIDCF_NLOCS];
/*
* We're a pseudo-device, so we get to announce our own
* presence.
*/
aprint_normal_dev(self, "found %u RAID volume%s\n",
ataraid_array_info_count,
ataraid_array_info_count == 1 ? "" : "s");
TAILQ_FOREACH(aai, &ataraid_array_info_list, aai_list) {
locs[ATARAIDCF_VENDTYPE] = aai->aai_type;
locs[ATARAIDCF_UNIT] = aai->aai_arrayno;
config_found_sm_loc(self, "ataraid", locs, aai,
ataraid_print, config_stdsubmatch);
}
}
/*
* ataraid_print:
*
* Autoconfiguration glue: print routine.
*/
static int
ataraid_print(void *aux, const char *pnp)
{
struct ataraid_array_info *aai = aux;
if (pnp != NULL)
aprint_normal("block device at %s", pnp);
aprint_normal(" vendtype %d unit %d", aai->aai_type, aai->aai_arrayno);
return (UNCONF);
}
/*
* ata_raid_check_component:
*
* Check the component for a RAID configuration structure.
* Called via autoconfiguration callback.
*/
void
ata_raid_check_component(device_t self)
{
struct wd_softc *sc = device_private(self);
if (ata_raid_read_config_adaptec(sc) == 0)
return;
if (ata_raid_read_config_promise(sc) == 0)
return;
if (ata_raid_read_config_via(sc) == 0)
return;
if (ata_raid_read_config_nvidia(sc) == 0)
return;
if (ata_raid_read_config_jmicron(sc) == 0)
return;
if (ata_raid_read_config_intel(sc) == 0)
return;
}
struct ataraid_array_info *
ata_raid_get_array_info(u_int type, u_int arrayno)
{
struct ataraid_array_info *aai, *laai;
TAILQ_FOREACH(aai, &ataraid_array_info_list, aai_list) {
if (aai->aai_type == type &&
aai->aai_arrayno == arrayno)
goto out;
}
/* Need to allocate a new one. */
aai = malloc(sizeof(*aai), M_DEVBUF, M_WAITOK | M_ZERO);
aai->aai_type = type;
aai->aai_arrayno = arrayno;
ataraid_array_info_count++;
if (TAILQ_EMPTY(&ataraid_array_info_list)) {
TAILQ_INSERT_TAIL(&ataraid_array_info_list, aai, aai_list);
goto out;
}
/* Sort it into the list: type first, then array number. */
TAILQ_FOREACH(laai, &ataraid_array_info_list, aai_list) {
if (aai->aai_type < laai->aai_type) {
TAILQ_INSERT_BEFORE(laai, aai, aai_list);
goto out;
}
if (aai->aai_type == laai->aai_type &&
aai->aai_arrayno < laai->aai_arrayno) {
TAILQ_INSERT_BEFORE(laai, aai, aai_list);
goto out;
}
}
TAILQ_INSERT_TAIL(&ataraid_array_info_list, aai, aai_list);
out:
return (aai);
}
int
ata_raid_config_block_rw(struct vnode *vp, daddr_t blkno, void *tbuf,
size_t size, int bflags)
{
struct buf *bp;
int error;
bp = getiobuf(vp, false);
bp->b_blkno = blkno;
bp->b_bcount = bp->b_resid = size;
bp->b_flags = bflags;
bp->b_proc = curproc;
bp->b_data = tbuf;
SET(bp->b_cflags, BC_BUSY); /* mark buffer busy */
VOP_STRATEGY(vp, bp);
error = biowait(bp);
putiobuf(bp);
return (error);
}