Initial source

1 files changed, 115 insertions, 0 deletions

diff --git a/scsi/scsi_comm.c b/scsi/scsi_comm.c
new file mode 100644
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--- /dev/null
+++ b/scsi/scsi_comm.c
@@ -0,0 +1,115 @@
+/* 
+ * 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: scsi_comm.c
+ * 	Author: Alessandro Forin, Carnegie Mellon University
+ *	Date:	10/90
+ *
+ *	Middle layer of the SCSI driver: SCSI protocol implementation
+ *
+ * This file contains code for SCSI commands for COMMUNICATION devices.
+ */
+
+#include <mach/std_types.h>
+#include <scsi/compat_30.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_defs.h>
+
+#if  (NSCSI > 0)
+
+char *sccomm_name(
+	boolean_t	internal)
+{
+	return internal ? "cz" : "comm";
+}
+
+void scsi_get_message(
+	register target_info_t	*tgt,
+	io_req_t		ior)
+{
+	scsi_cmd_read_t		*cmd;
+	register unsigned	len, max;
+
+	max = scsi_softc[(unsigned char)tgt->masterno]->max_dma_data;
+
+	len = ior->io_count;
+	if (len > max) {
+		ior->io_residual = len - max;
+		len = max;
+	}
+
+	cmd = (scsi_cmd_read_t*) (tgt->cmd_ptr);
+	cmd->scsi_cmd_code = SCSI_CMD_GET_MESSAGE;
+	cmd->scsi_cmd_lun_and_lba1 = tgt->lun << SCSI_LUN_SHIFT;
+	cmd->scsi_cmd_lba2 	   = len >> 16;
+	cmd->scsi_cmd_lba3 	   = len >>  8;
+	cmd->scsi_cmd_xfer_len     = len;
+	cmd->scsi_cmd_ctrl_byte = 0;	/* not linked */
+	
+	tgt->cur_cmd = SCSI_CMD_GET_MESSAGE;
+
+	scsi_go(tgt, sizeof(*cmd), len, FALSE);
+}
+
+void scsi_send_message(
+	register target_info_t	*tgt,
+	io_req_t		ior)
+{
+	scsi_cmd_write_t	*cmd;
+	register unsigned	len, max;
+
+	len = ior->io_count;
+	max = scsi_softc[(unsigned char)tgt->masterno]->max_dma_data;
+
+	if (len > max) {
+		ior->io_residual = len - max;
+		len = max;
+	}
+
+	cmd = (scsi_cmd_write_t*) (tgt->cmd_ptr);
+	cmd->scsi_cmd_code = SCSI_CMD_SEND_MESSAGE;
+	cmd->scsi_cmd_lun_and_lba1 = tgt->lun << SCSI_LUN_SHIFT;
+	cmd->scsi_cmd_lba2 	   = len >> 16;
+	cmd->scsi_cmd_lba3 	   = len >>  8;
+	cmd->scsi_cmd_xfer_len     = len;
+	cmd->scsi_cmd_ctrl_byte = 0;	/* not linked */
+	
+	tgt->cur_cmd = SCSI_CMD_SEND_MESSAGE;
+
+	scsi_go(tgt, sizeof(*cmd), 0, FALSE);
+}
+
+
+#if 0
+/* For now, these are not needed */
+scsi_get_message_long
+scsi_get_message_vlong
+scsi_send_message_long
+scsi_send_message_vlong
+#endif
+
+#endif  /* NSCSI > 0 */