FreeBSD-5.3/sys/dev/mlx/mlx_disk.c
/*-
* Copyright (c) 1999 Jonathan Lemon
* Copyright (c) 1999 Michael Smith
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/dev/mlx/mlx_disk.c,v 1.33 2004/05/30 20:08:36 phk Exp $");
/*
* Disk driver for Mylex DAC960 RAID adapters.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <geom/geom_disk.h>
#include <dev/mlx/mlx_compat.h>
#include <dev/mlx/mlxio.h>
#include <dev/mlx/mlxvar.h>
#include <dev/mlx/mlxreg.h>
/* prototypes */
static int mlxd_probe(device_t dev);
static int mlxd_attach(device_t dev);
static int mlxd_detach(device_t dev);
devclass_t mlxd_devclass;
static device_method_t mlxd_methods[] = {
DEVMETHOD(device_probe, mlxd_probe),
DEVMETHOD(device_attach, mlxd_attach),
DEVMETHOD(device_detach, mlxd_detach),
{ 0, 0 }
};
static driver_t mlxd_driver = {
"mlxd",
mlxd_methods,
sizeof(struct mlxd_softc)
};
DRIVER_MODULE(mlxd, mlx, mlxd_driver, mlxd_devclass, 0, 0);
static int
mlxd_open(struct disk *dp)
{
struct mlxd_softc *sc = (struct mlxd_softc *)dp->d_drv1;
debug_called(1);
if (sc == NULL)
return (ENXIO);
/* controller not active? */
if (sc->mlxd_controller->mlx_state & MLX_STATE_SHUTDOWN)
return(ENXIO);
sc->mlxd_flags |= MLXD_OPEN;
return (0);
}
static int
mlxd_close(struct disk *dp)
{
struct mlxd_softc *sc = (struct mlxd_softc *)dp->d_drv1;
debug_called(1);
if (sc == NULL)
return (ENXIO);
sc->mlxd_flags &= ~MLXD_OPEN;
return (0);
}
static int
mlxd_ioctl(struct disk *dp, u_long cmd, void *addr, int flag, struct thread *td)
{
struct mlxd_softc *sc = (struct mlxd_softc *)dp->d_drv1;
int error;
debug_called(1);
if (sc == NULL)
return (ENXIO);
if ((error = mlx_submit_ioctl(sc->mlxd_controller, sc->mlxd_drive, cmd, addr, flag, td)) != ENOIOCTL) {
debug(0, "mlx_submit_ioctl returned %d\n", error);
return(error);
}
return (ENOTTY);
}
/*
* Read/write routine for a buffer. Finds the proper unit, range checks
* arguments, and schedules the transfer. Does not wait for the transfer
* to complete. Multi-page transfers are supported. All I/O requests must
* be a multiple of a sector in length.
*/
static void
mlxd_strategy(mlx_bio *bp)
{
struct mlxd_softc *sc = (struct mlxd_softc *)MLX_BIO_SOFTC(bp);
debug_called(1);
/* bogus disk? */
if (sc == NULL) {
MLX_BIO_SET_ERROR(bp, EINVAL);
goto bad;
}
/* XXX may only be temporarily offline - sleep? */
if (sc->mlxd_drive->ms_state == MLX_SYSD_OFFLINE) {
MLX_BIO_SET_ERROR(bp, ENXIO);
goto bad;
}
MLX_BIO_STATS_START(bp);
mlx_submit_buf(sc->mlxd_controller, bp);
return;
bad:
/*
* Correctly set the bio to indicate a failed tranfer.
*/
MLX_BIO_RESID(bp) = MLX_BIO_LENGTH(bp);
MLX_BIO_DONE(bp);
return;
}
void
mlxd_intr(void *data)
{
mlx_bio *bp = (mlx_bio *)data;
debug_called(1);
if (MLX_BIO_HAS_ERROR(bp))
MLX_BIO_SET_ERROR(bp, EIO);
else
MLX_BIO_RESID(bp) = 0;
MLX_BIO_STATS_END(bp);
MLX_BIO_DONE(bp);
}
static int
mlxd_probe(device_t dev)
{
debug_called(1);
device_set_desc(dev, "Mylex System Drive");
return (0);
}
static int
mlxd_attach(device_t dev)
{
struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev);
device_t parent;
char *state;
int s1, s2;
debug_called(1);
parent = device_get_parent(dev);
sc->mlxd_controller = (struct mlx_softc *)device_get_softc(parent);
sc->mlxd_unit = device_get_unit(dev);
sc->mlxd_drive = device_get_ivars(dev);
sc->mlxd_dev = dev;
switch(sc->mlxd_drive->ms_state) {
case MLX_SYSD_ONLINE:
state = "online";
break;
case MLX_SYSD_CRITICAL:
state = "critical";
break;
case MLX_SYSD_OFFLINE:
state = "offline";
break;
default:
state = "unknown state";
}
device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n",
sc->mlxd_drive->ms_size / ((1024 * 1024) / MLX_BLKSIZE),
sc->mlxd_drive->ms_size, sc->mlxd_drive->ms_raidlevel, state);
sc->mlxd_disk = disk_alloc();
sc->mlxd_disk->d_open = mlxd_open;
sc->mlxd_disk->d_close = mlxd_close;
sc->mlxd_disk->d_ioctl = mlxd_ioctl;
sc->mlxd_disk->d_strategy = mlxd_strategy;
sc->mlxd_disk->d_name = "mlxd";
sc->mlxd_disk->d_unit = sc->mlxd_unit;
sc->mlxd_disk->d_drv1 = sc;
sc->mlxd_disk->d_sectorsize = MLX_BLKSIZE;
sc->mlxd_disk->d_mediasize = MLX_BLKSIZE * (off_t)sc->mlxd_drive->ms_size;
sc->mlxd_disk->d_fwsectors = sc->mlxd_drive->ms_sectors;
sc->mlxd_disk->d_fwheads = sc->mlxd_drive->ms_heads;
sc->mlxd_disk->d_flags = DISKFLAG_NEEDSGIANT;
/*
* Set maximum I/O size to the lesser of the recommended maximum and the practical
* maximum except on v2 cards where the maximum is set to 8 pages.
*/
if (sc->mlxd_controller->mlx_iftype == MLX_IFTYPE_2)
sc->mlxd_disk->d_maxsize = 8 * PAGE_SIZE;
else {
s1 = sc->mlxd_controller->mlx_enq2->me_maxblk * MLX_BLKSIZE;
s2 = (sc->mlxd_controller->mlx_enq2->me_max_sg - 1) * PAGE_SIZE;
sc->mlxd_disk->d_maxsize = imin(s1, s2);
}
disk_create(sc->mlxd_disk, DISK_VERSION);
return (0);
}
static int
mlxd_detach(device_t dev)
{
struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev);
debug_called(1);
disk_destroy(sc->mlxd_disk);
return(0);
}