280 lines
7.0 KiB
C
280 lines
7.0 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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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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/bio.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/module.h>
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#include <sys/sx.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <geom/geom_disk.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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devclass_t mlxd_devclass;
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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(struct disk *dp)
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{
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struct mlxd_softc *sc = (struct mlxd_softc *)dp->d_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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/* controller not active? */
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MLX_CONFIG_LOCK(sc->mlxd_controller);
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MLX_IO_LOCK(sc->mlxd_controller);
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if (sc->mlxd_controller->mlx_state & MLX_STATE_SHUTDOWN) {
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MLX_IO_UNLOCK(sc->mlxd_controller);
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MLX_CONFIG_UNLOCK(sc->mlxd_controller);
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return(ENXIO);
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}
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sc->mlxd_flags |= MLXD_OPEN;
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MLX_IO_UNLOCK(sc->mlxd_controller);
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MLX_CONFIG_UNLOCK(sc->mlxd_controller);
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return (0);
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}
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static int
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mlxd_close(struct disk *dp)
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{
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struct mlxd_softc *sc = (struct mlxd_softc *)dp->d_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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MLX_CONFIG_LOCK(sc->mlxd_controller);
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MLX_IO_LOCK(sc->mlxd_controller);
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sc->mlxd_flags &= ~MLXD_OPEN;
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MLX_IO_UNLOCK(sc->mlxd_controller);
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MLX_CONFIG_UNLOCK(sc->mlxd_controller);
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return (0);
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}
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static int
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mlxd_ioctl(struct disk *dp, u_long cmd, void *addr, int flag, struct thread *td)
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{
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struct mlxd_softc *sc = (struct mlxd_softc *)dp->d_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, td)) != 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 bio *bp)
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{
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struct mlxd_softc *sc = bp->bio_disk->d_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->bio_error = EINVAL;
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bp->bio_flags |= BIO_ERROR;
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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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MLX_IO_LOCK(sc->mlxd_controller);
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if (sc->mlxd_drive->ms_state == MLX_SYSD_OFFLINE) {
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MLX_IO_UNLOCK(sc->mlxd_controller);
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bp->bio_error = ENXIO;
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bp->bio_flags |= BIO_ERROR;
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goto bad;
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}
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mlx_submit_buf(sc->mlxd_controller, bp);
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MLX_IO_UNLOCK(sc->mlxd_controller);
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return;
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bad:
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/*
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* Correctly set the bio to indicate a failed tranfer.
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*/
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bp->bio_resid = bp->bio_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(struct bio *bp)
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{
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debug_called(1);
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if (bp->bio_flags & BIO_ERROR)
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bp->bio_error = EIO;
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else
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bp->bio_resid = 0;
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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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int s1, s2;
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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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sc->mlxd_disk = disk_alloc();
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sc->mlxd_disk->d_open = mlxd_open;
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sc->mlxd_disk->d_close = mlxd_close;
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sc->mlxd_disk->d_ioctl = mlxd_ioctl;
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sc->mlxd_disk->d_strategy = mlxd_strategy;
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sc->mlxd_disk->d_name = "mlxd";
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sc->mlxd_disk->d_unit = sc->mlxd_unit;
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sc->mlxd_disk->d_drv1 = sc;
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sc->mlxd_disk->d_sectorsize = MLX_BLKSIZE;
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sc->mlxd_disk->d_mediasize = MLX_BLKSIZE * (off_t)sc->mlxd_drive->ms_size;
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sc->mlxd_disk->d_fwsectors = sc->mlxd_drive->ms_sectors;
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sc->mlxd_disk->d_fwheads = sc->mlxd_drive->ms_heads;
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/*
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* Set maximum I/O size to the lesser of the recommended maximum and the practical
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* maximum except on v2 cards where the maximum is set to 8 pages.
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*/
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if (sc->mlxd_controller->mlx_iftype == MLX_IFTYPE_2)
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sc->mlxd_disk->d_maxsize = 8 * MLX_PAGE_SIZE;
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else {
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s1 = sc->mlxd_controller->mlx_enq2->me_maxblk * MLX_BLKSIZE;
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s2 = (sc->mlxd_controller->mlx_enq2->me_max_sg - 1) * MLX_PAGE_SIZE;
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sc->mlxd_disk->d_maxsize = imin(s1, s2);
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}
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disk_create(sc->mlxd_disk, DISK_VERSION);
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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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disk_destroy(sc->mlxd_disk);
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return(0);
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}
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