Reviewed by: gibbs@freefall.cdrom.com julian@freefall.cdrom.com

1. Support for fixed device configuration
2. Hoisted common code to scsi_driver
3. SCSI busses dynamically allocated at boot
4. Reorg'd for LKMs

1 files changed, 177 insertions, 0 deletions

diff --git a/sys/scsi/scsi_driver.c b/sys/scsi/scsi_driver.c
new file mode 100644
index 0000000..8155c70
--- /dev/null
+++ b/sys/scsi/scsi_driver.c
@@ -0,0 +1,177 @@
+/* 
+ * Copyright (C) 1995, HD Associates, Inc.
+ * PO Box 276
+ * Pepperell, MA 01463
+ * 508 433 5266
+ * dufault@hda.com
+ *
+ * This code is contributed to the University of California at Berkeley:
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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: scsi_ioctl.c,v 1.10 1995/01/19 12:41:36 dufault Exp $
+ *
+ */
+#include <sys/types.h>
+#include <sys/errno.h>
+#include <sys/param.h>
+#include <sys/buf.h>
+#include <sys/malloc.h>
+
+#include <scsi/scsi_all.h>
+#include <scsi/scsiconf.h>
+#include <scsi/scsi_driver.h>
+
+#define GETUNIT(DEVICE, DEV) \
+	((DEVICE)->getunit) ? (*(DEVICE)->getunit)((DEV)) : minor((DEV))
+
+int
+scsi_goaway(struct kern_devconf *kdc, int force) /* XXX should do a lot more */
+{
+	dev_detach(kdc);
+	FREE(kdc, M_TEMP);
+	return 0;
+}
+
+int scsi_device_attach(struct scsi_link *sc_link)
+{
+	errval errcode;
+	dev_t dev;
+	struct scsi_device *device = sc_link->device;
+
+	SC_DEBUG(sc_link, SDEV_DB2,
+	("%s%dattach: ", device->name, sc_link->dev_unit));
+
+	dev = scsi_dev_lookup(device->open);
+
+	sc_link->dev = (device->setunit ?
+	(*device->setunit)(dev, sc_link->dev_unit) :
+	makedev(major(dev), sc_link->dev_unit) );
+
+	errcode = (*(device->attach))(sc_link);
+
+	if (errcode == 0)
+		sc_link->flags |= device->link_flags;
+
+	return errcode;
+}
+
+errval 
+scsi_open(dev_t dev, int flags, struct scsi_device *device)
+{
+	errval  errcode;
+	u_int32 unit;
+	struct scsi_link *sc_link;
+
+	unit = GETUNIT(device, dev);
+	sc_link = SCSI_LINK(device, unit);
+
+	/*
+	 * Check the unit is legal 
+	 */
+	if (sc_link == 0 || sc_link->sd == 0)
+		return ENXIO;
+
+	errcode = (device->dev_open) ? 
+		(*device->dev_open)(dev, flags, sc_link) : 0;
+
+	if (sc_link->flags & SDEV_ONCE_ONLY) {
+		/*
+		 * Only allow one at a time
+		 */
+		if (sc_link->flags & SDEV_OPEN) {
+			return EBUSY;
+		}
+
+		sc_link->flags |= SDEV_OPEN;
+	}
+
+	SC_DEBUG(sc_link, SDEV_DB1, ("%sopen: dev=0x%x (unit %d of %d) result %d\n",
+		device->name, dev, unit, device->size, errcode));
+
+	return errcode;
+}
+
+/*
+ * close the device.. only called if we are the LAST
+ * occurence of an open device
+ */
+errval 
+scsi_close(dev_t dev, struct scsi_device *device)
+{
+	errval errcode;
+	struct scsi_link *scsi_link = SCSI_LINK(device, GETUNIT(device, dev));
+
+	SC_DEBUG(scsi_link, SDEV_DB1, ("%sclose:  Closing device\n", device->name));
+
+	errcode = (device->dev_close) ?
+		(*device->dev_close)(dev, scsi_link) : 0;
+
+	if (scsi_link->flags & SDEV_ONCE_ONLY)
+		scsi_link->flags &= ~SDEV_OPEN;
+
+	return errcode;
+}
+
+errval 
+scsi_ioctl(dev_t dev, u_int32 cmd, caddr_t arg, int mode,
+struct scsi_device *device)
+{
+	errval errcode;
+	struct scsi_link *scsi_link = SCSI_LINK(device, GETUNIT(device, dev));
+
+	errcode = (device->dev_ioctl) ?
+		(*device->dev_ioctl)(dev, cmd, arg, mode, scsi_link)
+		: scsi_do_ioctl(dev, cmd, arg, mode, scsi_link);
+
+	return errcode;
+}
+
+void 
+scsi_minphys(struct buf *bp, struct scsi_device *device)
+{
+	struct scsi_link *sc_link = SCSI_LINK(device, GETUNIT(device, bp->b_dev));
+	(*sc_link->adapter->scsi_minphys)(bp);
+}
+
+void
+scsi_strategy(struct buf *bp, struct scsi_device *device)
+{
+	struct scsi_link *sc_link = SCSI_LINK(device, GETUNIT(device, bp->b_dev));
+
+	SC_DEBUG(sc_link, SDEV_DB2, ("\n%sstrategy ", device->name));
+	SC_DEBUG(sc_link, SDEV_DB1, ("%s%ld: %d bytes @ blk%d\n",
+		device->name, unit, bp->b_bcount, bp->b_blkno));
+
+	if (device->dev_strategy)
+	{
+		(*sc_link->adapter->scsi_minphys)(bp);
+		(*device->dev_strategy)(bp, sc_link);
+	}
+}