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-rw-r--r--sys/dev/mlx/mlx_disk.c259
1 files changed, 259 insertions, 0 deletions
diff --git a/sys/dev/mlx/mlx_disk.c b/sys/dev/mlx/mlx_disk.c
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+++ b/sys/dev/mlx/mlx_disk.c
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+/*-
+ * 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/kernel.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.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_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;
+
+ /*
+ * 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_unit, &sc->mlxd_disk, 0, NULL, NULL);
+
+ 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);
+}
+
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