NetBSD/sys/dev/pci/ld_twe.c

215 lines
5.9 KiB
C

/* $NetBSD: ld_twe.c,v 1.8 2001/11/13 07:48:46 lukem 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.
*/
/*
* 3ware "Escalade" RAID controller front-end for ld(4) driver.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ld_twe.c,v 1.8 2001/11/13 07:48:46 lukem Exp $");
#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>
#include <dev/ldvar.h>
#include <dev/pci/twereg.h>
#include <dev/pci/twevar.h>
struct ld_twe_softc {
struct ld_softc sc_ld;
int sc_hwunit;
};
static void ld_twe_attach(struct device *, struct device *, void *);
static int ld_twe_dobio(struct ld_twe_softc *, void *, int, int, int,
struct buf *);
static int ld_twe_dump(struct ld_softc *, void *, int, int);
static void ld_twe_handler(struct twe_ccb *, int);
static int ld_twe_match(struct device *, struct cfdata *, void *);
static int ld_twe_start(struct ld_softc *, struct buf *);
struct cfattach ld_twe_ca = {
sizeof(struct ld_twe_softc), ld_twe_match, ld_twe_attach
};
static int
ld_twe_match(struct device *parent, struct cfdata *match, void *aux)
{
return (1);
}
static void
ld_twe_attach(struct device *parent, struct device *self, void *aux)
{
struct twe_attach_args *twea;
struct ld_twe_softc *sc;
struct ld_softc *ld;
struct twe_softc *twe;
sc = (struct ld_twe_softc *)self;
ld = &sc->sc_ld;
twe = (struct twe_softc *)parent;
twea = aux;
sc->sc_hwunit = twea->twea_unit;
ld->sc_flags = LDF_ENABLED;
ld->sc_maxxfer = TWE_MAX_XFER;
ld->sc_secperunit = twe->sc_dsize[twea->twea_unit];
ld->sc_secsize = TWE_SECTOR_SIZE;
ld->sc_maxqueuecnt = (TWE_MAX_QUEUECNT - 1) / twe->sc_nunits;
ld->sc_start = ld_twe_start;
ld->sc_dump = ld_twe_dump;
printf("\n");
ldattach(ld);
}
static int
ld_twe_dobio(struct ld_twe_softc *sc, void *data, int datasize, int blkno,
int dowrite, struct buf *bp)
{
struct twe_ccb *ccb;
struct twe_cmd *tc;
struct twe_softc *twe;
int s, rv, flags;
twe = (struct twe_softc *)sc->sc_ld.sc_dv.dv_parent;
flags = (dowrite ? TWE_CCB_DATA_OUT : TWE_CCB_DATA_IN);
if ((rv = twe_ccb_alloc(twe, &ccb, flags)) != 0)
return (rv);
ccb->ccb_data = data;
ccb->ccb_datasize = datasize;
tc = ccb->ccb_cmd;
/* Build the command. */
tc->tc_size = 3;
tc->tc_unit = sc->sc_hwunit;
tc->tc_count = htole16(datasize / TWE_SECTOR_SIZE);
tc->tc_args.io.lba = htole32(blkno);
if (dowrite)
tc->tc_opcode = TWE_OP_WRITE | (tc->tc_size << 5);
else
tc->tc_opcode = TWE_OP_READ | (tc->tc_size << 5);
/* Map the data transfer. */
if ((rv = twe_ccb_map(twe, ccb)) != 0) {
twe_ccb_free(twe, ccb);
return (rv);
}
if (bp == NULL) {
/*
* Polled commands must not sit on the software queue. Wait
* up to 2 seconds for the command to complete.
*/
s = splbio();
rv = twe_ccb_poll(twe, ccb, 2000);
twe_ccb_unmap(twe, ccb);
twe_ccb_free(twe, ccb);
splx(s);
} else {
ccb->ccb_tx.tx_handler = ld_twe_handler;
ccb->ccb_tx.tx_context = bp;
ccb->ccb_tx.tx_dv = (struct device *)sc;
twe_ccb_enqueue(twe, ccb);
rv = 0;
}
return (rv);
}
static int
ld_twe_start(struct ld_softc *ld, struct buf *bp)
{
return (ld_twe_dobio((struct ld_twe_softc *)ld, bp->b_data,
bp->b_bcount, bp->b_rawblkno, (bp->b_flags & B_READ) == 0, bp));
}
static void
ld_twe_handler(struct twe_ccb *ccb, int error)
{
struct buf *bp;
struct twe_context *tx;
struct ld_twe_softc *sc;
struct twe_softc *twe;
tx = &ccb->ccb_tx;
bp = tx->tx_context;
sc = (struct ld_twe_softc *)tx->tx_dv;
twe = (struct twe_softc *)sc->sc_ld.sc_dv.dv_parent;
twe_ccb_unmap(twe, ccb);
twe_ccb_free(twe, ccb);
if (error) {
bp->b_flags |= B_ERROR;
bp->b_error = error;
bp->b_resid = bp->b_bcount;
} else
bp->b_resid = 0;
lddone(&sc->sc_ld, bp);
}
static int
ld_twe_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt)
{
return (ld_twe_dobio((struct ld_twe_softc *)ld, data,
blkcnt * ld->sc_secsize, blkno, 1, NULL));
}