Update scsi code to the latest from Julian. This code is now identical

to the last copy from Julian.  After this commit I will be commiting the
local fixes and makeing diffs to send back to Julian so he can update his
code.

----
From julian@jules.DIALix.oz.au  Thu Aug  5 09:25:23 1993
To: hd@world.std.com, julian@jules.DIALix.oz.au
Cc: nate@bsd.coe.montana.edu
Subject: Re: new scsi

----
From julian@jules.DIALix.oz.au  Sat Aug  7 04:13:17 1993
To: hd@world.std.com (HD Associates)
Cc: nate@bsd.coe.montana.edu
Subject: Re: timeout diffs

Here are the diffs to take the scsi stuff to my latest tree from what
Nate and you received..

the changes remove all the local timeout stuff and use (un)timeout(),

----
From julian@jules.DIALix.oz.au  Sat Aug  7 04:13:45 1993
To: hd@world.std.com (HD Associates)
Cc: nate@bsd.coe.montana.edu, briggs@csugrad.cs.vt.edu

here is a fix for a silly bug in the scsiconf I just sent out
and a similar fix for st.c

1 files changed, 25 insertions, 23 deletions

diff --git a/sys/scsi/scsi_changer.h b/sys/scsi/scsi_changer.h
index 16ca71f..172f9c3 100644
--- a/sys/scsi/scsi_changer.h
+++ b/sys/scsi/scsi_changer.h
@@ -1,4 +1,16 @@
 /*
+ * HISTORY
+ *
+ * PATCHES MAGIC                LEVEL   PATCH THAT GOT US HERE
+ * --------------------         -----   ----------------------
+ * CURRENT PATCH LEVEL:         1       00098
+ * --------------------         -----   ----------------------
+ *
+ * 16 Feb 93	Julian Elischer		ADDED for SCSI system
+ * 
+ */
+
+/*
  * SCSI changer interface description
  */
 
@@ -29,17 +41,15 @@
 struct scsi_read_element_status
 {
         u_char  op_code;
-	u_char	element_type_code:4;
-	u_char  voltag:1;
-        u_char  lun:3;
+	u_char	byte2;
+#define	SRES_ELEM_TYPE_CODE 	0x0F
+#define	SRES_ELEM_VOLTAG 	0x10
 	u_char	starting_element_addr[2];
 	u_char	number_of_elements[2];
 	u_char	resv1;
 	u_char	allocation_length[3];
 	u_char	resv2;
-        u_char  link:1;
-        u_char  flag:1;
-        u_char  :6;
+	u_char	control;
 };
 #define RE_ALL_ELEMENTS			0
 #define RE_MEDIUM_TRANSPORT_ELEMENT	1
@@ -50,32 +60,24 @@ struct scsi_read_element_status
 struct scsi_move_medium
 {
 	u_char  op_code;
-	u_char	:5;
-	u_char	lun:3;
+	u_char	byte2;
 	u_char  transport_element_address[2];
 	u_char  source_address[2];
 	u_char  destination_address[2];
 	u_char  rsvd[2];
-	u_char  invert:1;
-	u_char	:7;
-        u_char  link:1;
-        u_char  flag:1;
-        u_char  :6;
+	u_char  invert;
+	u_char	control;
 };
 
 struct scsi_position_to_element
 {
 	u_char  op_code;
-	u_char	:5;
-	u_char	lun:3;
+        u_char  byte2;
 	u_char  transport_element_address[2];
 	u_char  source_address[2];
 	u_char  rsvd[2];
-	u_char  invert:1;
-	u_char	:7;
-        u_char  link:1;
-        u_char  flag:1;
-        u_char  :6;
+	u_char  invert;
+	u_char	control;
 };
 	
 /*
@@ -96,9 +98,9 @@ struct scsi_element_status_data
 struct element_status_page 
 {
 	u_char	element_type_code;
-	u_char	:5;
-	u_char avoltag:1;
-	u_char pvoltag:1;
+	u_char	flags;
+#define	ESP_AVOLTAG	0x40
+#define	ESP_PVOLTAG	0x80
 	u_char element_descriptor_length[2];
 	u_char rsvd;
 	u_char byte_count_of_descriptor_data[3];