315 lines
7.6 KiB
C
315 lines
7.6 KiB
C
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/*-
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* Copyright (c) 1999 Jonathan Lemon
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* Copyright (c) 1999 Michael Smith
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* Disk driver for Mylex DAC960 RAID adapters.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/kernel.h>
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#include <sys/buf.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/devicestat.h>
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#include <sys/disk.h>
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#include <machine/bus.h>
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#include <machine/clock.h>
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#include <sys/rman.h>
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#include <dev/mlx/mlxio.h>
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#include <dev/mlx/mlxvar.h>
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#if 0
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#define debug(fmt, args...) printf("%s: " fmt "\n", __FUNCTION__ , ##args)
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#else
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#define debug(fmt, args...)
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#endif
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/* prototypes */
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static int mlxd_probe(device_t dev);
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static int mlxd_attach(device_t dev);
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static int mlxd_detach(device_t dev);
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static d_open_t mlxd_open;
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static d_close_t mlxd_close;
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static d_strategy_t mlxd_strategy;
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static d_ioctl_t mlxd_ioctl;
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#define MLXD_BDEV_MAJOR 27
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#define MLXD_CDEV_MAJOR 131
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static struct cdevsw mlxd_cdevsw = {
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/* open */ mlxd_open,
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/* close */ mlxd_close,
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/* read */ physread,
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/* write */ physwrite,
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/* ioctl */ mlxd_ioctl,
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/* poll */ nopoll,
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/* mmap */ nommap,
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/* strategy */ mlxd_strategy,
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/* name */ "mlxd",
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/* maj */ MLXD_CDEV_MAJOR,
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/* dump */ nodump,
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/* psize */ nopsize,
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/* flags */ D_DISK,
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/* bmaj */ MLXD_BDEV_MAJOR
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};
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static devclass_t mlxd_devclass;
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static struct cdevsw mlxddisk_cdevsw;
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static int disks_registered = 0;
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static device_method_t mlxd_methods[] = {
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DEVMETHOD(device_probe, mlxd_probe),
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DEVMETHOD(device_attach, mlxd_attach),
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DEVMETHOD(device_detach, mlxd_detach),
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{ 0, 0 }
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};
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static driver_t mlxd_driver = {
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"mlxd",
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mlxd_methods,
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sizeof(struct mlxd_softc)
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};
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DRIVER_MODULE(mlxd, mlx, mlxd_driver, mlxd_devclass, 0, 0);
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static __inline struct mlxd_softc *
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mlxd_getsoftc(dev_t dev)
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{
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int unit;
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unit = dkunit(dev);
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return ((struct mlxd_softc *)devclass_get_softc(mlxd_devclass, unit));
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}
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static int
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mlxd_open(dev_t dev, int flags, int fmt, struct proc *p)
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{
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struct mlxd_softc *sc = mlxd_getsoftc(dev);
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struct disklabel *label;
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debug("called");
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if (sc == NULL)
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return (ENXIO);
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/* controller not active? */
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if (sc->mlxd_controller->mlx_state & MLX_STATE_SHUTDOWN)
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return(ENXIO);
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label = &sc->mlxd_disk.d_label;
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bzero(label, sizeof(*label));
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label->d_type = DTYPE_SCSI;
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label->d_secsize = MLX_BLKSIZE;
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label->d_nsectors = sc->mlxd_drive->ms_sectors;
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label->d_ntracks = sc->mlxd_drive->ms_heads;
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label->d_ncylinders = sc->mlxd_drive->ms_cylinders;
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label->d_secpercyl = sc->mlxd_drive->ms_sectors * sc->mlxd_drive->ms_heads;
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label->d_secperunit = sc->mlxd_drive->ms_size;
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/* set maximum I/O size */
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dev->si_iosize_max = sc->mlxd_controller->mlx_maxiosize;
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sc->mlxd_flags |= MLXD_OPEN;
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return (0);
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}
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static int
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mlxd_close(dev_t dev, int flags, int fmt, struct proc *p)
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{
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struct mlxd_softc *sc = mlxd_getsoftc(dev);
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debug("called");
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if (sc == NULL)
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return (ENXIO);
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sc->mlxd_flags &= ~MLXD_OPEN;
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return (0);
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}
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static int
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mlxd_ioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, struct proc *p)
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{
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struct mlxd_softc *sc = mlxd_getsoftc(dev);
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int error;
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debug("called");
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if (sc == NULL)
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return (ENXIO);
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if ((error = mlx_submit_ioctl(sc->mlxd_controller, sc->mlxd_drive, cmd, addr, flag, p)) != ENOIOCTL) {
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debug("mlx_submit_ioctl returned %d\n", error);
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return(error);
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}
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return (ENOTTY);
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}
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/*
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* Read/write routine for a buffer. Finds the proper unit, range checks
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* arguments, and schedules the transfer. Does not wait for the transfer
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* to complete. Multi-page transfers are supported. All I/O requests must
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* be a multiple of a sector in length.
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*/
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static void
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mlxd_strategy(struct buf *bp)
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{
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struct mlxd_softc *sc = mlxd_getsoftc(bp->b_dev);
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int s;
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debug("called");
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/* bogus disk? */
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if (sc == NULL) {
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bp->b_error = EINVAL;
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goto bad;
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}
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/* XXX may only be temporarily offline - sleep? */
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if (sc->mlxd_drive->ms_state == MLX_SYSD_OFFLINE) {
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bp->b_error = ENXIO;
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goto bad;
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}
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/* do-nothing operation */
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if (bp->b_bcount == 0)
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goto done;
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/* pass reference to us */
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bp->b_driver1 = sc;
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s = splbio();
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devstat_start_transaction(&sc->mlxd_stats);
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mlx_submit_buf(sc->mlxd_controller, bp);
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splx(s);
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return;
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bad:
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bp->b_flags |= B_ERROR;
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done:
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/*
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* Correctly set the buf to indicate a completed transfer
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*/
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bp->b_resid = bp->b_bcount;
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biodone(bp);
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return;
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}
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void
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mlxd_intr(void *data)
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{
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struct buf *bp = (struct buf *)data;
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struct mlxd_softc *sc = (struct mlxd_softc *)bp->b_driver1;
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debug("called");
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if (bp->b_flags & B_ERROR)
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bp->b_error = EIO;
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else
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bp->b_resid = 0;
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devstat_end_transaction_buf(&sc->mlxd_stats, bp);
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biodone(bp);
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}
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static int
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mlxd_probe(device_t dev)
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{
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debug("called");
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device_set_desc(dev, "Mylex System Drive");
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return (0);
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}
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static int
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mlxd_attach(device_t dev)
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{
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struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev);
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device_t parent;
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char *state;
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debug("called");
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parent = device_get_parent(dev);
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sc->mlxd_controller = (struct mlx_softc *)device_get_softc(parent);
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sc->mlxd_unit = device_get_unit(dev);
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sc->mlxd_drive = device_get_ivars(dev);
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switch(sc->mlxd_drive->ms_state) {
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case MLX_SYSD_ONLINE:
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state = "online";
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break;
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case MLX_SYSD_CRITICAL:
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state = "critical";
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break;
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case MLX_SYSD_OFFLINE:
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state = "offline";
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break;
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default:
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state = "unknown state";
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}
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device_printf(dev, "%uMB (%u sectors), RAID %d (%s)\n",
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sc->mlxd_drive->ms_size / ((1024 * 1024) / MLX_BLKSIZE),
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sc->mlxd_drive->ms_size, sc->mlxd_drive->ms_raidlevel, state);
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devstat_add_entry(&sc->mlxd_stats, "mlxd", sc->mlxd_unit, MLX_BLKSIZE,
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DEVSTAT_NO_ORDERED_TAGS,
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DEVSTAT_TYPE_DIRECT | DEVSTAT_TYPE_IF_OTHER,
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DEVSTAT_PRIORITY_DA);
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disk_create(sc->mlxd_unit, &sc->mlxd_disk, 0, &mlxd_cdevsw, &mlxddisk_cdevsw);
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disks_registered++;
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return (0);
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}
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static int
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mlxd_detach(device_t dev)
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{
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struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev);
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debug("called");
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devstat_remove_entry(&sc->mlxd_stats);
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/* hack to handle lack of destroy_disk() */
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if (--disks_registered == 0)
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cdevsw_remove(&mlxddisk_cdevsw);
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return(0);
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}
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