/* $NetBSD: ld_cac.c,v 1.31 2017/08/09 16:44:40 mlelstv Exp $ */
/*-
* Copyright (c) 2000, 2006 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.
*
* 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.
*/
/*
* Compaq array controller front-end for ld(4) driver.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ld_cac.c,v 1.31 2017/08/09 16:44:40 mlelstv Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/buf.h>
#include <sys/bufq.h>
#include <sys/endian.h>
#include <sys/dkio.h>
#include <sys/disk.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <dev/ldvar.h>
#include <dev/ic/cacreg.h>
#include <dev/ic/cacvar.h>
#include "ioconf.h"
struct ld_cac_softc {
struct ld_softc sc_ld;
kmutex_t *sc_mutex;
int sc_hwunit;
int sc_serrcnt;
struct timeval sc_serrtm;
};
void ld_cac_attach(device_t, device_t, void *);
void ld_cac_done(device_t, void *, int);
int ld_cac_dump(struct ld_softc *, void *, int, int);
int ld_cac_match(device_t, cfdata_t, void *);
int ld_cac_start(struct ld_softc *, struct buf *);
static const struct timeval ld_cac_serrintvl = { 60, 0 };
CFATTACH_DECL_NEW(ld_cac, sizeof(struct ld_cac_softc),
ld_cac_match, ld_cac_attach, NULL, NULL);
int
ld_cac_match(device_t parent, cfdata_t match, void *aux)
{
return (1);
}
void
ld_cac_attach(device_t parent, device_t self, void *aux)
{
struct cac_drive_info dinfo;
struct cac_attach_args *caca;
struct ld_cac_softc *sc = device_private(self);
struct cac_softc *cac = device_private(parent);
struct ld_softc *ld = &sc->sc_ld;
const char *type;
caca = aux;
ld->sc_dv = self;
sc->sc_mutex = &cac->sc_mutex;
sc->sc_hwunit = caca->caca_unit;
if (cac_cmd(cac, CAC_CMD_GET_LOG_DRV_INFO, &dinfo, sizeof(dinfo),
sc->sc_hwunit, 0, CAC_CCB_DATA_IN, NULL)) {
aprint_error(": CMD_GET_LOG_DRV_INFO failed\n");
return;
}
ld->sc_secsize = CAC_GET2(dinfo.secsize);
ld->sc_maxxfer = CAC_MAX_XFER;
ld->sc_maxqueuecnt = (CAC_MAX_CCBS - 1) / cac->sc_nunits;
ld->sc_secperunit = CAC_GET2(dinfo.ncylinders) *
CAC_GET1(dinfo.nheads) * CAC_GET1(dinfo.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;
}
aprint_normal(": %s array\n", type);
/* XXX We should verify this... */
ld->sc_flags = LDF_ENABLED | LDF_MPSAFE;
ldattach(ld, BUFQ_DISK_DEFAULT_STRAT);
}
int
ld_cac_start(struct ld_softc *ld, struct buf *bp)
{
int flags, cmd;
struct cac_softc *cac;
struct ld_cac_softc *sc;
struct cac_context cc;
sc = (struct ld_cac_softc *)ld;
cac = device_private(device_parent(ld->sc_dv));
cc.cc_handler = ld_cac_done;
cc.cc_context = bp;
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));
}
int
ld_cac_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt)
{
struct ld_cac_softc *sc;
sc = (struct ld_cac_softc *)ld;
return (cac_cmd(device_private(device_parent(ld->sc_dv)),
CAC_CMD_WRITE_MEDIA, data, blkcnt * ld->sc_secsize,
sc->sc_hwunit, blkno, CAC_CCB_DATA_OUT, NULL));
}
void
ld_cac_done(device_t dv, void *context, int error)
{
struct buf *bp;
struct ld_cac_softc *sc;
int rv;
bp = context;
rv = 0;
sc = device_private(dv);
if ((error & CAC_RET_CMD_REJECTED) == CAC_RET_CMD_REJECTED) {
aprint_error_dev(dv, "command rejected\n");
rv = EIO;
}
if (rv == 0 && (error & CAC_RET_INVAL_BLOCK) != 0) {
aprint_error_dev(dv, "invalid request block\n");
rv = EIO;
}
if (rv == 0 && (error & CAC_RET_HARD_ERROR) != 0) {
aprint_error_dev(dv, "hard error\n");
rv = EIO;
}
if (rv == 0 && (error & CAC_RET_SOFT_ERROR) != 0) {
sc->sc_serrcnt++;
if (ratecheck(&sc->sc_serrtm, &ld_cac_serrintvl)) {
sc->sc_serrcnt = 0;
aprint_error_dev(dv,
"%d soft errors; array may be degraded\n",
sc->sc_serrcnt);
}
}
if (rv) {
bp->b_error = rv;
bp->b_resid = bp->b_bcount;
} else
bp->b_resid = 0;
mutex_exit(sc->sc_mutex);
lddone(&sc->sc_ld, bp);
mutex_enter(sc->sc_mutex);
}
MODULE(MODULE_CLASS_DRIVER, ld_cac, "ld,cac");
#ifdef _MODULE
/*
* XXX Don't allow ioconf.c to redefine the "struct cfdriver ld_cd"
* XXX it will be defined in the common-code module
*/
#undef CFDRIVER_DECL
#define CFDRIVER_DECL(name, class, attr)
#include "ioconf.c"
#endif
static int
ld_cac_modcmd(modcmd_t cmd, void *opaque)
{
int error = 0;
#ifdef _MODULE
/*
* We ignore the cfdriver_vec[] that ioconf provides, since
* the cfdrivers are attached already.
*/
static struct cfdriver * const no_cfdriver_vec[] = { NULL };
#endif
#ifdef _MODULE
switch (cmd) {
case MODULE_CMD_INIT:
error = config_init_component(no_cfdriver_vec,
cfattach_ioconf_ld_cac, cfdata_ioconf_ld_cac);
break;
case MODULE_CMD_FINI:
error = config_fini_component(no_cfdriver_vec,
cfattach_ioconf_ld_cac, cfdata_ioconf_ld_cac);
break;
default:
error = ENOTTY;
break;
}
#endif
return error;
}