0b7ed341e1
Previously the "struct disk" were owned by the device driver and this gave us problems when the device disappared and the users of that device were not immediately disappearing. Now the struct disk is allocate with a new call, disk_alloc() and owned by geom_disk and just abandonned by the device driver when disk_create() is called. Unfortunately, this results in a ton of "s/\./->/" changes to device drivers. Since I'm doing the sweep anyway, a couple of other API improvements have been carried out at the same time: The Giant awareness flag has been flipped from DISKFLAG_NOGIANT to DISKFLAG_NEEDSGIANT A version number have been added to disk_create() so that we can detect, report and ignore binary drivers with old ABI in the future. Manual page update to follow shortly.
265 lines
6.6 KiB
C
265 lines
6.6 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/kernel.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/mlx_compat.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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if (sc->mlxd_controller->mlx_state & MLX_STATE_SHUTDOWN)
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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_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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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(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(mlx_bio *bp)
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{
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struct mlxd_softc *sc = (struct mlxd_softc *)MLX_BIO_SOFTC(bp);
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debug_called(1);
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/* bogus disk? */
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if (sc == NULL) {
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MLX_BIO_SET_ERROR(bp, 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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MLX_BIO_SET_ERROR(bp, ENXIO);
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goto bad;
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}
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MLX_BIO_STATS_START(bp);
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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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/*
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* Correctly set the bio to indicate a failed tranfer.
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*/
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MLX_BIO_RESID(bp) = MLX_BIO_LENGTH(bp);
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MLX_BIO_DONE(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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mlx_bio *bp = (mlx_bio *)data;
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debug_called(1);
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if (MLX_BIO_HAS_ERROR(bp))
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MLX_BIO_SET_ERROR(bp, EIO);
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else
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MLX_BIO_RESID(bp) = 0;
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MLX_BIO_STATS_END(bp);
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MLX_BIO_DONE(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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sc->mlxd_disk->d_flags = DISKFLAG_NEEDSGIANT;
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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 * 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) * 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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