NetBSD/sys/dev/ic/ld_cac.c

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/* $NetBSD: ld_cac.c,v 1.2 2000/12/11 13:19:51 ad Exp $ */
/*-
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Andrew Doran.
*
* 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 by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/
/*
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* Compaq array controller front-end for ld(4) driver.
*/
#include "rnd.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/buf.h>
#include <sys/endian.h>
#include <sys/dkio.h>
#include <sys/disk.h>
#if NRND > 0
#include <sys/rnd.h>
#endif
#include <machine/bus.h>
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#include <dev/ldvar.h>
#include <dev/ic/cacreg.h>
#include <dev/ic/cacvar.h>
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struct ld_cac_softc {
struct ld_softc sc_ld;
int sc_hwunit;
struct timeval sc_serrtm;
int sc_serrcnt;
};
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static void ld_cac_attach(struct device *, struct device *, void *);
static void ld_cac_done(struct device *, void *, int);
static int ld_cac_dump(struct ld_softc *, void *, int, int);
static int ld_cac_match(struct device *, struct cfdata *, void *);
static int ld_cac_start(struct ld_softc *, struct buf *);
static struct timeval ld_cac_serrintvl = { 60, 0 };
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struct cfattach ld_cac_ca = {
sizeof(struct ld_cac_softc), ld_cac_match, ld_cac_attach
};
static int
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ld_cac_match(struct device *parent, struct cfdata *match, void *aux)
{
return (1);
}
static void
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ld_cac_attach(struct device *parent, struct device *self, void *aux)
{
struct cac_drive_info dinfo;
struct cac_attach_args *caca;
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struct ld_softc *ld;
struct ld_cac_softc *sc;
struct cac_softc *cac;
const char *type;
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sc = (struct ld_cac_softc *)self;
ld = &sc->sc_ld;
caca = (struct cac_attach_args *)aux;
sc->sc_hwunit = caca->caca_unit;
cac = (struct cac_softc *)parent;
if (cac_cmd(cac, CAC_CMD_GET_LOG_DRV_INFO, &dinfo, sizeof(dinfo),
sc->sc_hwunit, 0, CAC_CCB_DATA_IN, NULL)) {
printf("%s: CMD_GET_LOG_DRV_INFO failed\n", self->dv_xname);
return;
}
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ld->sc_ncylinders = CAC_GET2(dinfo.ncylinders);
ld->sc_nheads = CAC_GET1(dinfo.nheads);
ld->sc_nsectors = CAC_GET1(dinfo.nsectors);
ld->sc_secsize = CAC_GET2(dinfo.secsize);
ld->sc_maxxfer = CAC_MAX_XFER;
ld->sc_maxqueuecnt = CAC_MAX_CCBS / cac->sc_nunits; /* XXX */
ld->sc_secperunit = ld->sc_ncylinders * ld->sc_nheads *
ld->sc_nsectors;
ld->sc_start = ld_cac_start;
ld->sc_dump = ld_cac_dump;
switch (CAC_GET1(dinfo.mirror)) {
case 0:
type = "standalone disk or RAID0";
break;
case 1:
type = "RAID4";
break;
case 2:
type = "RAID1";
break;
case 3:
type = "RAID5";
break;
default:
type = "unknown type of";
break;
}
printf(": %s array\n", type);
/* XXX We should verify this... */
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ld->sc_flags = LDF_ENABLED;
ldattach(ld);
}
static int
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ld_cac_start(struct ld_softc *ld, struct buf *bp)
{
int flags, cmd;
struct cac_softc *cac;
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struct ld_cac_softc *sc;
struct cac_context cc;
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sc = (struct ld_cac_softc *)ld;
cac = (struct cac_softc *)ld->sc_dv.dv_parent;
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cc.cc_handler = ld_cac_done;
cc.cc_context = bp;
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cc.cc_dv = &ld->sc_dv;
if ((bp->b_flags & B_READ) == 0) {
cmd = CAC_CMD_WRITE;
flags = CAC_CCB_DATA_OUT;
} else {
cmd = CAC_CMD_READ;
flags = CAC_CCB_DATA_IN;
}
return (cac_cmd(cac, cmd, bp->b_data, bp->b_bcount, sc->sc_hwunit,
bp->b_rawblkno, flags, &cc));
}
static int
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ld_cac_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt)
{
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struct ld_cac_softc *sc;
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sc = (struct ld_cac_softc *)ld;
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return (cac_cmd((struct cac_softc *)ld->sc_dv.dv_parent,
CAC_CMD_WRITE_MEDIA, data, blkcnt * ld->sc_secsize,
sc->sc_hwunit, blkno, CAC_CCB_DATA_OUT, NULL));
}
static void
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ld_cac_done(struct device *dv, void *context, int error)
{
struct buf *bp;
struct ld_cac_softc *sc;
bp = context;
if ((error & CAC_RET_HARD_ERROR) != 0) {
printf("%s: hard error\n", dv->dv_xname);
error = EIO;
}
if ((error & CAC_RET_CMD_REJECTED) != 0) {
printf("%s: invalid request\n", dv->dv_xname);
error = EIO;
}
if ((error & CAC_RET_SOFT_ERROR) != 0) {
sc = (struct ld_cac_softc *)dv;
sc->sc_serrcnt++;
if (ratecheck(&sc->sc_serrtm, &ld_cac_serrintvl)) {
printf("%s: %d soft errors; array may be degraded\n",
dv->dv_xname, sc->sc_serrcnt);
sc->sc_serrcnt = 0;
}
error = 0;
}
if (error) {
bp->b_flags |= B_ERROR;
bp->b_error = error;
bp->b_resid = bp->b_bcount;
} else
bp->b_resid = 0;
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lddone((struct ld_softc *)dv, bp);
}