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-rw-r--r--sys/dev/mlx/mlx_disk.c314
1 files changed, 314 insertions, 0 deletions
diff --git a/sys/dev/mlx/mlx_disk.c b/sys/dev/mlx/mlx_disk.c
new file mode 100644
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--- /dev/null
+++ b/sys/dev/mlx/mlx_disk.c
@@ -0,0 +1,314 @@
+/*-
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * Disk driver for Mylex DAC960 RAID adapters.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+#include <sys/kernel.h>
+
+#include <sys/buf.h>
+#include <sys/bus.h>
+#include <sys/conf.h>
+#include <sys/devicestat.h>
+#include <sys/disk.h>
+
+#include <machine/bus.h>
+#include <machine/clock.h>
+#include <sys/rman.h>
+
+#include <dev/mlx/mlxio.h>
+#include <dev/mlx/mlxvar.h>
+
+#if 0
+#define debug(fmt, args...) printf("%s: " fmt "\n", __FUNCTION__ , ##args)
+#else
+#define debug(fmt, args...)
+#endif
+
+/* prototypes */
+static int mlxd_probe(device_t dev);
+static int mlxd_attach(device_t dev);
+static int mlxd_detach(device_t dev);
+
+static d_open_t mlxd_open;
+static d_close_t mlxd_close;
+static d_strategy_t mlxd_strategy;
+static d_ioctl_t mlxd_ioctl;
+
+#define MLXD_BDEV_MAJOR 27
+#define MLXD_CDEV_MAJOR 131
+
+static struct cdevsw mlxd_cdevsw = {
+ /* open */ mlxd_open,
+ /* close */ mlxd_close,
+ /* read */ physread,
+ /* write */ physwrite,
+ /* ioctl */ mlxd_ioctl,
+ /* poll */ nopoll,
+ /* mmap */ nommap,
+ /* strategy */ mlxd_strategy,
+ /* name */ "mlxd",
+ /* maj */ MLXD_CDEV_MAJOR,
+ /* dump */ nodump,
+ /* psize */ nopsize,
+ /* flags */ D_DISK,
+ /* bmaj */ MLXD_BDEV_MAJOR
+};
+
+static devclass_t mlxd_devclass;
+static struct cdevsw mlxddisk_cdevsw;
+static int disks_registered = 0;
+
+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 __inline struct mlxd_softc *
+mlxd_getsoftc(dev_t dev)
+{
+ int unit;
+
+ unit = dkunit(dev);
+ return ((struct mlxd_softc *)devclass_get_softc(mlxd_devclass, unit));
+}
+
+static int
+mlxd_open(dev_t dev, int flags, int fmt, struct proc *p)
+{
+ struct mlxd_softc *sc = mlxd_getsoftc(dev);
+ struct disklabel *label;
+
+ debug("called");
+
+ if (sc == NULL)
+ return (ENXIO);
+
+ /* controller not active? */
+ if (sc->mlxd_controller->mlx_state & MLX_STATE_SHUTDOWN)
+ return(ENXIO);
+
+ label = &sc->mlxd_disk.d_label;
+ bzero(label, sizeof(*label));
+ label->d_type = DTYPE_SCSI;
+ label->d_secsize = MLX_BLKSIZE;
+ label->d_nsectors = sc->mlxd_drive->ms_sectors;
+ label->d_ntracks = sc->mlxd_drive->ms_heads;
+ label->d_ncylinders = sc->mlxd_drive->ms_cylinders;
+ label->d_secpercyl = sc->mlxd_drive->ms_sectors * sc->mlxd_drive->ms_heads;
+ label->d_secperunit = sc->mlxd_drive->ms_size;
+
+ /* set maximum I/O size */
+ dev->si_iosize_max = sc->mlxd_controller->mlx_maxiosize;
+
+ sc->mlxd_flags |= MLXD_OPEN;
+ return (0);
+}
+
+static int
+mlxd_close(dev_t dev, int flags, int fmt, struct proc *p)
+{
+ struct mlxd_softc *sc = mlxd_getsoftc(dev);
+
+ debug("called");
+
+ if (sc == NULL)
+ return (ENXIO);
+ sc->mlxd_flags &= ~MLXD_OPEN;
+ return (0);
+}
+
+static int
+mlxd_ioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, struct proc *p)
+{
+ struct mlxd_softc *sc = mlxd_getsoftc(dev);
+ int error;
+
+ debug("called");
+
+ if (sc == NULL)
+ return (ENXIO);
+
+ if ((error = mlx_submit_ioctl(sc->mlxd_controller, sc->mlxd_drive, cmd, addr, flag, p)) != ENOIOCTL) {
+ debug("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(struct buf *bp)
+{
+ struct mlxd_softc *sc = mlxd_getsoftc(bp->b_dev);
+ int s;
+
+ debug("called");
+
+ /* bogus disk? */
+ if (sc == NULL) {
+ bp->b_error = EINVAL;
+ goto bad;
+ }
+
+ /* XXX may only be temporarily offline - sleep? */
+ if (sc->mlxd_drive->ms_state == MLX_SYSD_OFFLINE) {
+ bp->b_error = ENXIO;
+ goto bad;
+ }
+
+ /* do-nothing operation */
+ if (bp->b_bcount == 0)
+ goto done;
+
+ /* pass reference to us */
+ bp->b_driver1 = sc;
+ s = splbio();
+ devstat_start_transaction(&sc->mlxd_stats);
+ mlx_submit_buf(sc->mlxd_controller, bp);
+ splx(s);
+ return;
+
+ bad:
+ bp->b_flags |= B_ERROR;
+
+ done:
+ /*
+ * Correctly set the buf to indicate a completed transfer
+ */
+ bp->b_resid = bp->b_bcount;
+ biodone(bp);
+ return;
+}
+
+void
+mlxd_intr(void *data)
+{
+ struct buf *bp = (struct buf *)data;
+ struct mlxd_softc *sc = (struct mlxd_softc *)bp->b_driver1;
+
+ debug("called");
+
+ if (bp->b_flags & B_ERROR)
+ bp->b_error = EIO;
+ else
+ bp->b_resid = 0;
+
+ devstat_end_transaction_buf(&sc->mlxd_stats, bp);
+ biodone(bp);
+}
+
+static int
+mlxd_probe(device_t dev)
+{
+
+ debug("called");
+
+ 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;
+
+ debug("called");
+
+ 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);
+
+ 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);
+
+ devstat_add_entry(&sc->mlxd_stats, "mlxd", sc->mlxd_unit, MLX_BLKSIZE,
+ DEVSTAT_NO_ORDERED_TAGS,
+ DEVSTAT_TYPE_DIRECT | DEVSTAT_TYPE_IF_OTHER,
+ DEVSTAT_PRIORITY_DA);
+
+ disk_create(sc->mlxd_unit, &sc->mlxd_disk, 0, &mlxd_cdevsw, &mlxddisk_cdevsw);
+ disks_registered++;
+
+ return (0);
+}
+
+static int
+mlxd_detach(device_t dev)
+{
+ struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev);
+
+ debug("called");
+
+ devstat_remove_entry(&sc->mlxd_stats);
+
+ /* hack to handle lack of destroy_disk() */
+ if (--disks_registered == 0)
+ cdevsw_remove(&mlxddisk_cdevsw);
+
+ return(0);
+}
+
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