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+/*
+ * Mach Operating System
+ * Copyright (c) 1991,1990 Carnegie Mellon University
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
+ * School of Computer Science
+ * Carnegie Mellon University
+ * Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+/*
+ * File: rz_host.c
+ * Author: Alessandro Forin, Carnegie Mellon University
+ * Date: 7/91
+ *
+ * Top layer of the SCSI driver: interface with the MI.
+ * This file contains operations specific to CPU-like devices.
+ *
+ * We handle here the case of other hosts that are capable of
+ * sophisticated host-to-host communication protocols, we make
+ * them look like... you'll see.
+ *
+ * There are two sides of the coin here: when we take the initiative
+ * and when the other host does it. Code for handling both cases is
+ * provided in this one file.
+ */
+
+#include <mach/std_types.h>
+#include <machine/machspl.h> /* spl definitions */
+#include <scsi/compat_30.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_defs.h>
+#include <scsi/rz.h>
+
+#if (NSCSI > 0)
+/* Since we have invented a new "device" this cannot go into the
+ the 'official' scsi_devsw table. Too bad. */
+
+extern char *schost_name();
+extern scsi_ret_t
+ schost_open(), schost_close();
+extern int schost_strategy();
+extern void schost_start();
+
+scsi_devsw_t scsi_host = {
+ schost_name, 0, schost_open, schost_close, schost_strategy,
+ schost_start, 0, 0
+};
+
+char *schost_name(internal)
+ boolean_t internal;
+{
+ return internal ? "sh" : "host";
+}
+
+scsi_ret_t
+schost_open(tgt)
+ target_info_t *tgt;
+{
+ return SCSI_RET_SUCCESS; /* XXX if this is it, drop it */
+}
+
+scsi_ret_t
+schost_close(tgt)
+ target_info_t *tgt;
+{
+ return SCSI_RET_SUCCESS; /* XXX if this is it, drop it */
+}
+
+schost_strategy(ior)
+ register io_req_t ior;
+{
+ return rz_simpleq_strategy( ior, schost_start);
+}
+
+void
+schost_start( tgt, done)
+ target_info_t *tgt;
+ boolean_t done;
+{
+ io_req_t head, ior;
+ scsi_ret_t ret;
+
+ if (done || (!tgt->dev_info.cpu.req_pending)) {
+ sccpu_start( tgt, done);
+ return;
+ }
+
+ ior = tgt->ior;
+}
+
+#endif /* NSCSI > 0 */