scsireg.h

<B>Digital的Unix操作系统VAX 4.2源码</B>

#ifdef KERNEL
#include "../h/ansi_compat.h"
#else
#include <ansi_compat.h>
#endif

#ifndef	SCSIREG_INCLUDE
#define	SCSIREG_INCLUDE	1

/*
 *	1/3/91	(ULTRIX)	@(#)scsireg.h	4.6
 */

/************************************************************************
 *									*
 *			Copyright (c) 1986, 1988, 1989 by		*
 *		Digital Equipment Corporation, Maynard, MA		*
 *			All rights reserved.				*
 *									*
 *   This software is furnished under a license and may be used and	*
 *   copied  only  in accordance with the terms of such license and	*
 *   with the  inclusion  of  the  above  copyright  notice.   This	*
 *   software  or  any  other copies thereof may not be provided or	*
 *   otherwise made available to any other person.  No title to and	*
 *   ownership of the software is hereby transferred.			*
 *									*
 *   This software is  derived  from  software  received  from  the	*
 *   University    of   California,   Berkeley,   and   from   Bell	*
 *   Laboratories.  Use, duplication, or disclosure is  subject  to	*
 *   restrictions  under  license  agreements  with  University  of	*
 *   California and with AT&T.						*
 *									*
 *   The information in this software is subject to change  without	*
 *   notice  and should not be construed as a commitment by Digital	*
 *   Equipment Corporation.						*
 *									*
 *   Digital assumes no responsibility for the use  or  reliability	*
 *   of its software on equipment which is not supplied by Digital.	*
 *									*
 ************************************************************************/

 /***********************************************************************
  * scsireg.h	6-Jun-88
  *
  * Modification History
  *
  *  11/20/90	Robin Miller
  *	Added defines for 10-byte READ/WRITE CDB's.
  *
  *  09/13/90	Robin Miller
  *	Added additional QIC density codes.
  *
  *  07/31/90	Robin Miller
  *	Added defines for RRD42 CDROM, RX26 diskette, & RZ25 disk.
  *
  * 07/16/90    Janet L. Schank
  *     Added a define for RZ23L.
  *
  * 06/07/90	Bill Dallas
  *	Added the generic option tables that are linked to devtab. These
  *	allow easy additions of devices. 
  * 
  *  23-Jan-90  Janet L. Schank
  *     Added define for TLZ04 (RDAT).
  *
  *  13-Nov-89  Janet L. Schank / Art Zemon
  *     Added TZ05, RZ24, and RZ57 support.
  *
  *  08-Oct-89	Fred Canter
  *	Document scsi_devtab flags with comments.
  *
  *  07-Oct-89	Fred Canter
  *	Save removable media bit in sz_softc structure.
  *
  *  04-Oct-89	Fred Canter
  *	Added sector number to error log packet for disk errors.
  *	Bump SCSI error log packet version number up to 2.
  *
  *  18-Aug-89  Janet L. Schank
  *     Added a define for the size of sz_timetable, SZ_TIMETBL_SZ
  *
  *  23-Jul-89	Fred Canter
  *	Convert DBBR printfs to error log calls.
  *	RX33 support.
  *
  *  22-Jul-89	Fred Canter
  *	Make SCSI error log version number first in error log packet.
  *
  *  18-Jul-89 	John A. Gallant
  *	Added the SZ_NODBBR flag definition for disabling DBBR.
  *
  *  14-Jul-89	Fred Canter
  *	Merged dynamic BBR and error log changes.
  *
  *  23-Jun-89 	John A. Gallant
  *	Added defines for read/write long
  *	Added variables for the BBR state machine.
  *	Added the function pointer for device driver completion routine.
  *
  *  22-Jun-89	Fred Canter
  *	Save a copy of current CDB for error log.
  *	Save a copy of the status byte for the current command for error log.
  *
  *  20-Jun-89	Fred Canter
  *	Added RZ56 support.
  *
  *  18-Jun-89	Fred Canter
  *	Convert to scsi_devtab.
  *
  *  17-Jun-89	Fred Canter
  *	Added data structures and definitions needed for SCSI error logging.
  *
  * 11-Jun-89	Fred Canter
  *	Added media changed counter to sz_softc. Softpc floppy hooks.
  *	Added additional sense code (sc_c_asc) to sz_softc.
  *
  *  24-Apr-89	Fred Canter
  *	Defined RX23s SCSI floppy.
  *
  *  06-Apr-89	Fred Canter
  *	Added sc_pxstate[] to sz_softc and #defines to support a
  *	target returning busy status (for TZxx).
  *
  *	Added b_comand to replace b_command for local command buffers.
  *	Use b_gid instead of b_resid to store command.
  *
  *	Added sc_tz_modsel to sz_softc for TZxx extended mode select.
  *
  *  08-Feb-89	Fred Canter
  *	Changed sc_sel_retry to array so select timeout retry count
  *	now on a per target basis.
  *
  *  03-Dec-88	Fred Canter
  *	Define number of retries for data xfer and other commands.
  *	Part of retry hardware error sense key modification.
  *
  *  03-Nov-88	Alan Frechette
  *	Added in support for disk maintainence. Added defines for 
  *	the commands FORMAT UNIT, REASSIGN BLOCK, READ DEFECT DATA
  *	and VERIFY DATA. Added fields to the "softc" structure for
  *	handling these special disk commands.
  *
  *	Added 5 additional flags to the "sc->sc_szflags" field for
  *	the SII.
  *
  *  16-Oct-88 -- Fred Canter
  *	Clean up comments. Moved SZDEBUG define from .c files to scsireg.h.
  *	Added RZxx for non-DEC disks. Added #ifdefs around spin stats
  *	variables in sz_softc structure.
  *
  *  28-Sep-88 -- Fred Canter
  *	Clean up comments.
  *
  *  29-Aug-88 -- Alan Frechette
  *	Added Asynchronous/Synchronous support to the SII. Added a 
  *	new field "sc_siireqack" to the softc structure. Also changed
  *	the name of some of the SII specific fields.
  *
  *  21-Aug-88 -- Fred Canter
  *	Improved device failed to select error handling.
  *	Added sc_rip (reset in progress) to sz_softc structure.
  *
  *  16-Aug-88 -- Fred Canter
  *	Merge 5380 and SII SCSI drivers.
  *	Moved 5380 chip specific register definitions to 5380reg.h.
  *
  *  08-Aug-88 -- Fred Canter
  *	Modify sz_softc for changes in scsi.c.
  *
  *  28-Jul-88 -- Fred Canter
  *	Clean up sz_flags definitions. Remove old background timer
  *	variables from sz_softc. Remove some debug variables from sz_softc.
  *
  *  18-Jul-88 -- Fred Canter
  *	Added controller alive to sz_softc.
  *
  *  16-Jul-88 -- Fred Canter
  *	Added disconnect timer, phase spin loop debug code,
  *	and save default partition table pointer in sz_softc.
  *
  * 28-Jun-88 -- Fred Canter
  *	Modified softc structure for improved ??command() error handling
  *	and background timer to catch resleect timeouts.
  *
  * 18-Jun-88 -- Fred Canter
  *	Added RZ55 support and a new flag for bus busy wait.
  *
  * 06-Jun-88 -- Fred Canter
  *	Created this header file for scsi.c from stcreg.h.
  *
  ***********************************************************************/


/*
 * Defining SZDEBUG enables a ton of debug printouts and
 * a debug variable (szdebug) to control which debug
 * messages get printed. This code is not of much use
 * in a running system because it floods the system with
 * printouts. Defining SZDEBUG also changes the timing
 * even if szdebug is set to zero. The SCSI bus analyzer
 * is a much better tool for debugging driver problems.
 */
/* #define	SZDEBUG */

/*
 * DMA Direction Register  (SCD_DIR)
 */
#define SZ_DMA_READ	0x0	/* A DMA read transfer is active */
#define SZ_DMA_WRITE	0x1	/* A DMA write transfer is active */

/*
 * The number of entries in sz_timetable.
 */
#define SZ_TIMETBL_SZ   0x40

/*
 * Flags  (sc_szflags)
 */
#define	SZ_NORMAL	0x000	/* Normal (no szflags set)		      */
#define SZ_NEED_SENSE	0x001	/* Need to do a Request Sense command	      */
#define SZ_REPOSITION	0x002	/* Need to reposition the tape	 (NOT USED)   */
#define SZ_ENCR_ERR	0x004	/* Encountered an error			      */
#define SZ_DID_DMA	0x008	/* A DMA operation has been done	      */
#define SZ_WAS_DISCON	0x010	/* Disconnect occured during this command     */
#define SZ_NODEVICE	0x020	/* No SCSI device present		      */
#define	SZ_BUSYBUS	0x040	/* Bus is busy, don't start next command      */
#define	SZ_RSTIMEOUT	0x080	/* Disconnected command to a disk timed out   */
				/* (force retry even if sense data is good).  */
#define	SZ_TIMERON	0x100	/* Disconnect being timed by timeout() call   */
#define	SZ_DID_STATUS	0x200	/* Status phase occurred (only used for debug)*/
#define SZ_DMA_DISCON	0x400	/* DMA was interrupted by a disconnect        */
#define	SZ_SELWAIT	0x800	/* Waiting for 250 MS select timeout	      */
#define SZ_ASSERT_ATN	0x1000	/* Need to assert the ATN signal 	      */
#define SZ_REJECT_MSG	0x2000	/* Need to reject a message 		      */
#define SZ_RESET_DEV	0x4000	/* Need to reset a scsi device                */
#define SZ_ABORT_CMD	0x8000	/* Need to abort the current command          */
#define SZ_RETRY_CMD	0x10000	/* Need to retry the current command          */
#define	SZ_BUSYTARG	0x20000	/* Target is busy, retry command later        */
#define	SZ_RECOVERED	0x40000	/* A recovered error occured, used w/BBR      */

/*
 * Maximum number of SCSI bus IDs (targets and initiator).
 * Also defines maximum number of logical units per SCSI controller.
 * Use to allocate/access all unit and target ID data structures.
 * MUST BE 8 - DO NOT CHANGE.
 */
#define	NDPS	8

/*
 * SCSI supported device class/type IDs
 */
#define	SZ_TAPE		0x80000000	/* TAPE device */
#define	SZ_DISK		0x40000000	/* DISK device */
#define	SZ_CDROM	0x20000000	/* CDROM device */
#define	SZ_UNKNOWN	0x10000000	/* UNKNOWN/UNSUPPORTED device */
#ifdef __mips
#define SZ_DEVMASK	0xf0000000	/* See if any of these */
#endif /* __mips */

#define	TZ30		0x80000001	/* TZ30 cartridge tape */
#define	TZK50		0x80000002	/* TZK50 cartridge tape */
#define	TZxx		0x80000004	/* TZxx non-DEC tape (may[not] work) */
#define TZ05		0x80001000	/* css tz05 */
#define TZ07		0x80001001	/* css tz07 */
#define	TZ9TRK		0x80001800	/* Generic non-DEC 9trk tape 
						(may[not] work) */
#define TLZ04           0x80002000      /* TLZ04 (RDAT) tape drive */
#define TZRDAT		0x80002800	/* Generic Rdat tape (may[not] work) */
#define TZK10		0x80004000	/* TZK10 (Qic) tape drive  */
#define	TZQIC		0x80004800	/* Generic non-DEC QIC tape 
						(may[not] work)	*/
#define TZK08		0x80008000	/* Exabyte TZK08 */	
#define TZ8MM		0x80008800	/* Generic non-DEC 8mm tape 
						(may[not] work)	*/

#define	RZ22		0x40000008	/* RZ22  40 MB winchester disk */
#define	RZ23		0x40000010	/* RZ23 100 MB winchester disk */
#define	RZ55		0x40000020	/* RZ55 300+ MB winchester disk */
#define	RZ56		0x40000040	/* RZ56 600+ MB winchester disk */
#define	RX23		0x40000080	/* RX23 3.5" 1.4MB SCSI floppy disk */
#define	RX33		0x40000100	/* RX33 5.25" 1.2MB SCSI floppy disk */
#define	RZxx		0x40000200	/* RZxx non-DEC disk (may[not] work) */
#define RZ24            0x40000400      /* RZ24 winchester disk */
#define RZ57            0x40000800      /* RZ57 winchester disk */
#define RZ23L           0x40001000      /* RZ23L 116Mb winchester disk */
#define RX26		0x40002000	/* RX26 3.5" 2.8MB SCSI floppy disk */
#define RZ25		0x40004000	/* RZ25 winchester disk */

#define	RRD40		0x20000400	/* RRD40 CDROM (optical disk) */
#define	CDxx		0x20000800	/* CDxx non-DEC CDROM (may[not] work)*/
#define RRD42		0x20001000	/* RRD42 CDROM (optical disk) */

/*
 * Driver and data specific structure
 *
 * The sz_softc structure is mostly longword alligned,
 * for readability when accessing it with ADB.
 */
#define	SZ_DNSIZE	SZ_VID_LEN+SZ_PID_LEN	/* ascii device name size */

/*
 * Turn on code which measures the amount of time spent
 * spinning in szintr and scsistart waiting for phase changes.
 */