421f2f7d74
- implement user-initiated background drive rebuild - implement user-initiated background consistency check - log controller-initiated background rebuild/check operations Try to fix the elusive "invalid log operation" bug, and panic if we do hit this one in the hopes of getting better information. Tidy up diagnostic messages. Try to use disk_create/disk_destroy correctly. This isn't working properly yet, but it's not clear whose fault that is.
295 lines
7.3 KiB
C
295 lines
7.3 KiB
C
/*-
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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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#include <dev/mlx/mlxreg.h>
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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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devclass_t mlxd_devclass;
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static struct cdevsw mlxddisk_cdevsw;
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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 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 = (struct mlxd_softc *)dev->si_drv1;
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struct disklabel *label;
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debug_called(1);
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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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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 = (struct mlxd_softc *)dev->si_drv1;
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debug_called(1);
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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 = (struct mlxd_softc *)dev->si_drv1;
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int error;
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debug_called(1);
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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(0, "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 = (struct mlxd_softc *)bp->b_dev->si_drv1;
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debug_called(1);
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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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devstat_start_transaction(&sc->mlxd_stats);
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mlx_submit_buf(sc->mlxd_controller, bp);
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return;
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bad:
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bp->b_ioflags |= BIO_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_dev->si_drv1;
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debug_called(1);
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if (bp->b_ioflags & BIO_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(1);
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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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dev_t dsk;
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debug_called(1);
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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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sc->mlxd_dev = 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_STORARRAY | DEVSTAT_TYPE_IF_OTHER,
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DEVSTAT_PRIORITY_ARRAY);
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dsk = disk_create(sc->mlxd_unit, &sc->mlxd_disk, 0, &mlxd_cdevsw, &mlxddisk_cdevsw);
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dsk->si_drv1 = sc;
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sc->mlxd_dev_t = dsk;
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/* set maximum I/O size */
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dsk->si_iosize_max = sc->mlxd_controller->mlx_enq2->me_maxblk * MLX_BLKSIZE;
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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(1);
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devstat_remove_entry(&sc->mlxd_stats);
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disk_destroy(sc->mlxd_dev_t);
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return(0);
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}
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