Compaq Smart RAID driver for -current. Based on the original ida.c

driver by Mark Dawson.  This probably needs some work, but is stable
enough to boot a RAID-only configuration, and survive `make world'.

1 files changed, 331 insertions, 0 deletions

diff --git a/sys/dev/ida/ida_disk.c b/sys/dev/ida/ida_disk.c
new file mode 100644
index 0000000..c3c94f5
--- /dev/null
+++ b/sys/dev/ida/ida_disk.c
@@ -0,0 +1,331 @@
+/*-
+ * Copyright (c) 1999 Jonathan Lemon
+ * 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.
+ *
+ *	$Id$
+ */
+
+/*
+ * Disk driver for Compaq SMART 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/device.h>
+#include <sys/devicestat.h>
+#include <sys/disklabel.h>
+#include <sys/diskslice.h>
+
+#if NPCI > 0
+#include <machine/bus_memio.h>
+#endif
+#include <machine/bus_pio.h>
+#include <machine/bus.h>
+#include <machine/clock.h>
+#include <sys/rman.h>
+
+#include <dev/ida/idareg.h>
+#include <dev/ida/idavar.h>
+
+/* prototypes */
+static void id_drvinit(void);
+static int idprobe(device_t dev);
+static int idattach(device_t dev);
+
+static	d_open_t	idopen;
+static	d_close_t	idclose;
+static	d_strategy_t	idstrategy;
+static	d_ioctl_t	idioctl;
+static	d_psize_t	idsize;
+
+#define ID_BDEV_MAJOR	29
+#define ID_CDEV_MAJOR	109
+
+#define WD_BDEV_MAJOR	0
+#define WD_CDEV_MAJOR	3
+
+static struct cdevsw id_cdevsw = {
+	/* open */	idopen,
+	/* close */	idclose,
+	/* read */	physread,
+	/* write */	physwrite,
+	/* ioctl */	idioctl,
+	/* stop */	nostop,
+	/* reset */	noreset,
+	/* devtotty */	nodevtotty,
+	/* poll */	nopoll,
+	/* mmap */	nommap,
+	/* strategy */	idstrategy,
+	/* name */ 	"id",
+	/* parms */	noparms,
+	/* maj */	ID_CDEV_MAJOR,
+	/* dump */	nodump,
+	/* psize */ 	idsize,
+	/* flags */	D_DISK,
+	/* maxio */	0,
+	/* bmaj */	ID_BDEV_MAJOR
+};
+static struct cdevsw stolen_cdevsw;
+
+static devclass_t	id_devclass;
+
+static device_method_t id_methods[] = {
+	DEVMETHOD(device_probe,		idprobe),
+	DEVMETHOD(device_attach,	idattach),
+	{ 0, 0 }
+};
+
+static driver_t id_driver = {
+	"id",
+	id_methods,
+	sizeof(struct id_softc)
+};
+
+static __inline struct id_softc *
+idgetsoftc(dev_t dev)
+{
+	int unit;
+
+	unit = dkunit(dev);
+	return ((struct id_softc *)devclass_get_softc(id_devclass, unit));
+}
+
+static int
+idopen(dev_t dev, int flags, int fmt, struct proc *p)
+{
+	struct id_softc *drv;
+	struct disklabel label;
+	int error;
+
+	drv = idgetsoftc(dev);
+	if (drv == NULL)
+		return (ENXIO);
+
+	/* XXX block against race where > 1 person is reading label? */
+
+	bzero(&label, sizeof(label));
+	label.d_type = DTYPE_SCSI;	/* XXX should this be DTYPE_RAID? */
+/*
+	strncpy(label.d_typename, ...
+	strncpy(label.d_packname, ...
+*/
+	label.d_secsize = drv->secsize;
+	label.d_nsectors = drv->sectors;
+	label.d_ntracks = drv->heads;
+	label.d_ncylinders = drv->cylinders;
+	label.d_secpercyl = drv->sectors * drv->heads;
+	label.d_secperunit = drv->secperunit;
+
+	/* Initialize slice tables. */
+	error = dsopen("id", dev, fmt, 0, &drv->slices, &label,
+	    idstrategy, (ds_setgeom_t *)NULL, &id_cdevsw);
+
+	return (error);
+}
+
+static int
+idclose(dev_t dev, int flags, int fmt, struct proc *p)
+{
+	struct id_softc *drv;
+
+	drv = idgetsoftc(dev);
+	if (drv == NULL)
+		return (ENXIO);
+	dsclose(dev, fmt, drv->slices);
+	return (0);
+}
+
+static int
+idioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, struct proc *p)
+{
+	struct id_softc *drv;
+	int error;
+
+	drv = idgetsoftc(dev);
+	if (drv == NULL)
+		return (ENXIO);
+
+	error = dsioctl("id", dev, cmd, addr, flag, &drv->slices,
+	    idstrategy, (ds_setgeom_t *)NULL);
+
+	if (error == ENOIOCTL)
+		return (ENOTTY);
+
+	return (error);
+}
+
+static int
+idsize(dev_t dev)
+{
+	struct id_softc *drv;
+
+	drv = idgetsoftc(dev);
+	if (drv == NULL)
+		return (ENXIO);
+	return (dssize(dev, &drv->slices, idopen, idclose));
+}
+
+/*
+ * 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
+idstrategy(struct buf *bp)
+{
+	struct id_softc *drv;
+	int s;
+
+	drv = idgetsoftc(bp->b_dev);
+	if (drv == NULL) {
+    		bp->b_error = EINVAL;
+		goto bad;
+	}
+
+	if (dscheck(bp, drv->slices) <= 0)
+		goto done;
+
+	/*
+	 * software write protect check
+	 */
+	if (drv->flags & DRV_WRITEPROT && (bp->b_flags & B_READ) == 0) {
+		bp->b_error = EROFS;
+		goto bad;
+	}
+
+	/*
+	 * If it's a null transfer, return immediately
+	 */
+	if (bp->b_bcount == 0)
+		goto done;
+
+	bp->b_driver1 = drv;
+	s = splbio();
+	devstat_start_transaction(&drv->stats);
+	ida_submit_buf(drv->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
+id_intr(struct buf *bp)
+{
+	struct id_softc *drv = (struct id_softc *)bp->b_driver1;
+
+	if (bp->b_flags & B_ERROR)
+		bp->b_error = EIO;
+	else
+		bp->b_resid = 0;
+
+	biodone(bp);
+	devstat_end_transaction(&drv->stats,
+	     bp->b_bcount - bp->b_resid, DEVSTAT_TAG_NONE,
+	     (bp->b_flags & B_READ) ? DEVSTAT_READ : DEVSTAT_WRITE);
+}
+
+static void
+id_drvinit(void)
+{
+	static int devsw_installed = 0;
+
+	if (devsw_installed)
+		return;				/* XXX is this needed? */
+
+	cdevsw_add(&id_cdevsw);
+	stolen_cdevsw = id_cdevsw;
+	stolen_cdevsw.d_maj = WD_CDEV_MAJOR;
+	stolen_cdevsw.d_bmaj = WD_BDEV_MAJOR;
+	cdevsw_add(&stolen_cdevsw);
+	devsw_installed = 1;
+}
+
+static int
+idprobe(device_t dev)
+{
+
+	id_drvinit();
+	device_set_desc(dev, "Compaq Logical Drive");
+	return (0);
+}
+
+static int
+idattach(device_t dev)
+{
+	struct ida_drive_info dinfo;
+	struct id_softc *drv;
+	device_t parent;
+	int error;
+
+	drv = (struct id_softc *)device_get_softc(dev);
+	parent = device_get_parent(dev);
+	drv->controller = (struct ida_softc *)device_get_softc(parent);
+	drv->unit = device_get_unit(dev);
+
+	error = ida_command(drv->controller, CMD_GET_LOG_DRV_INFO,
+	    &dinfo, sizeof(dinfo), drv->unit, DMA_DATA_IN);
+	if (error) {
+		device_printf(dev, "CMD_GET_LOG_DRV_INFO failed\n");
+		return (ENXIO);
+	}
+
+	drv->cylinders = dinfo.ncylinders;
+	drv->heads = dinfo.nheads;
+	drv->sectors = dinfo.nsectors;
+	drv->secsize = dinfo.secsize;
+	drv->secperunit = dinfo.secperunit;
+
+	/* XXX
+	 * other initialization
+	 */
+	device_printf(dev, "%uMB (%u sectors), blocksize=%d\n",
+	    drv->secperunit / ((1024 * 1024) / drv->secsize),
+	    drv->secperunit, drv->secsize);
+
+	devstat_add_entry(&drv->stats, "id", drv->unit, drv->secsize,
+	    DEVSTAT_NO_ORDERED_TAGS,
+	    DEVSTAT_TYPE_DIRECT | DEVSTAT_TYPE_IF_OTHER, DEVSTAT_PRIORITY_DA);
+
+	return (0);
+}
+
+DEV_DRIVER_MODULE(id, ida, id_driver, id_devclass,
+			ID_CDEV_MAJOR, ID_BDEV_MAJOR, id_cdevsw, 0, 0);