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-rw-r--r--sys/dev/amr/amr_disk.c299
1 files changed, 299 insertions, 0 deletions
diff --git a/sys/dev/amr/amr_disk.c b/sys/dev/amr/amr_disk.c
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--- /dev/null
+++ b/sys/dev/amr/amr_disk.c
@@ -0,0 +1,299 @@
+/*-
+ * 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 AMI MegaRaid controllers
+ */
+
+#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/amr/amrio.h>
+#include <dev/amr/amrreg.h>
+#include <dev/amr/amrvar.h>
+
+#if 0
+#define debug(fmt, args...) printf("%s: " fmt "\n", __FUNCTION__ , ##args)
+#else
+#define debug(fmt, args...)
+#endif
+
+/* prototypes */
+static int amrd_probe(device_t dev);
+static int amrd_attach(device_t dev);
+static int amrd_detach(device_t dev);
+
+static d_open_t amrd_open;
+static d_close_t amrd_close;
+static d_strategy_t amrd_strategy;
+static d_ioctl_t amrd_ioctl;
+
+#define AMRD_BDEV_MAJOR 35
+#define AMRD_CDEV_MAJOR 133
+
+static struct cdevsw amrd_cdevsw = {
+ /* open */ amrd_open,
+ /* close */ amrd_close,
+ /* read */ physread,
+ /* write */ physwrite,
+ /* ioctl */ amrd_ioctl,
+ /* poll */ nopoll,
+ /* mmap */ nommap,
+ /* strategy */ amrd_strategy,
+ /* name */ "amrd",
+ /* maj */ AMRD_CDEV_MAJOR,
+ /* dump */ nodump,
+ /* psize */ nopsize,
+ /* flags */ D_DISK,
+ /* bmaj */ AMRD_BDEV_MAJOR
+};
+
+static devclass_t amrd_devclass;
+static struct cdevsw amrddisk_cdevsw;
+static int disks_registered = 0;
+
+static device_method_t amrd_methods[] = {
+ DEVMETHOD(device_probe, amrd_probe),
+ DEVMETHOD(device_attach, amrd_attach),
+ DEVMETHOD(device_detach, amrd_detach),
+ { 0, 0 }
+};
+
+static driver_t amrd_driver = {
+ "amrd",
+ amrd_methods,
+ sizeof(struct amrd_softc)
+};
+
+DRIVER_MODULE(amrd, amr, amrd_driver, amrd_devclass, 0, 0);
+
+static __inline struct amrd_softc *
+amrd_getsoftc(dev_t dev)
+{
+ int unit;
+
+ unit = dkunit(dev);
+ return ((struct amrd_softc *)devclass_get_softc(amrd_devclass, unit));
+}
+
+static int
+amrd_open(dev_t dev, int flags, int fmt, struct proc *p)
+{
+ struct amrd_softc *sc = amrd_getsoftc(dev);
+ struct disklabel *label;
+
+ debug("called");
+
+ if (sc == NULL)
+ return (ENXIO);
+
+ /* controller not active? */
+ if (sc->amrd_controller->amr_state & AMR_STATE_SHUTDOWN)
+ return(ENXIO);
+
+ label = &sc->amrd_disk.d_label;
+ bzero(label, sizeof(*label));
+ label->d_type = DTYPE_SCSI;
+ label->d_secsize = AMR_BLKSIZE;
+ label->d_nsectors = sc->amrd_drive->al_sectors;
+ label->d_ntracks = sc->amrd_drive->al_heads;
+ label->d_ncylinders = sc->amrd_drive->al_cylinders;
+ label->d_secpercyl = sc->amrd_drive->al_sectors * sc->amrd_drive->al_heads;
+ label->d_secperunit = sc->amrd_drive->al_size;
+
+ sc->amrd_flags |= AMRD_OPEN;
+ return (0);
+}
+
+static int
+amrd_close(dev_t dev, int flags, int fmt, struct proc *p)
+{
+ struct amrd_softc *sc = amrd_getsoftc(dev);
+
+ debug("called");
+
+ if (sc == NULL)
+ return (ENXIO);
+ sc->amrd_flags &= ~AMRD_OPEN;
+ return (0);
+}
+
+static int
+amrd_ioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, struct proc *p)
+{
+ struct amrd_softc *sc = amrd_getsoftc(dev);
+ int error;
+
+ debug("called");
+
+ if (sc == NULL)
+ return (ENXIO);
+
+ if ((error = amr_submit_ioctl(sc->amrd_controller, sc->amrd_drive, cmd, addr, flag, p)) != ENOIOCTL) {
+ debug("amr_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
+amrd_strategy(struct buf *bp)
+{
+ struct amrd_softc *sc = amrd_getsoftc(bp->b_dev);
+ int s;
+
+ debug("called");
+
+ /* bogus disk? */
+ if (sc == NULL) {
+ bp->b_error = EINVAL;
+ goto bad;
+ }
+
+#if 0
+ /* XXX may only be temporarily offline - sleep? */
+ if (sc->amrd_drive->ld_state == AMR_SYSD_OFFLINE) {
+ bp->b_error = ENXIO;
+ goto bad;
+ }
+#endif
+
+ /* do-nothing operation */
+ if (bp->b_bcount == 0)
+ goto done;
+
+ /* pass reference to us */
+ bp->b_driver1 = sc;
+ s = splbio();
+ devstat_start_transaction(&sc->amrd_stats);
+ amr_submit_buf(sc->amrd_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
+amrd_intr(void *data)
+{
+ struct buf *bp = (struct buf *)data;
+ struct amrd_softc *sc = (struct amrd_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->amrd_stats, bp);
+ biodone(bp);
+}
+
+static int
+amrd_probe(device_t dev)
+{
+
+ debug("called");
+
+ device_set_desc(dev, "MegaRAID logical drive");
+ return (0);
+}
+
+static int
+amrd_attach(device_t dev)
+{
+ struct amrd_softc *sc = (struct amrd_softc *)device_get_softc(dev);
+ device_t parent;
+
+ debug("called");
+
+ parent = device_get_parent(dev);
+ sc->amrd_controller = (struct amr_softc *)device_get_softc(parent);
+ sc->amrd_unit = device_get_unit(dev);
+ sc->amrd_drive = device_get_ivars(dev);
+
+ device_printf(dev, "%uMB (%u sectors), state 0x%x properties 0x%x\n",
+ sc->amrd_drive->al_size / ((1024 * 1024) / AMR_BLKSIZE),
+ sc->amrd_drive->al_size, sc->amrd_drive->al_state, sc->amrd_drive->al_properties);
+
+ devstat_add_entry(&sc->amrd_stats, "amrd", sc->amrd_unit, AMR_BLKSIZE,
+ DEVSTAT_NO_ORDERED_TAGS,
+ DEVSTAT_TYPE_DIRECT | DEVSTAT_TYPE_IF_OTHER,
+ DEVSTAT_PRIORITY_DA);
+
+ disk_create(sc->amrd_unit, &sc->amrd_disk, 0, &amrd_cdevsw, &amrddisk_cdevsw);
+ disks_registered++;
+
+ return (0);
+}
+
+static int
+amrd_detach(device_t dev)
+{
+ struct amrd_softc *sc = (struct amrd_softc *)device_get_softc(dev);
+
+ debug("called");
+
+ devstat_remove_entry(&sc->amrd_stats);
+
+ /* hack to handle lack of destroy_disk() */
+ if (--disks_registered == 0)
+ cdevsw_remove(&amrddisk_cdevsw);
+
+ return(0);
+}
+
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