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Merge sd stuff from NetBSD-current. Helps with LS-120, ZIP

More SCSI logic from NetBSD-current

Some tape fixes. ATAPI tapes do not work yet for most operations.

/*	$OpenBSD: sdvar.h,v 1.1 1999/07/25 07:09:20 csapuntz Exp $	*/
/*	$NetBSD: sdvar.h,v 1.7 1998/08/17 00:49:03 mycroft Exp $	*/

/*-
 * Copyright (c) 1998 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Charles M. Hannum.
 *
 * 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 NetBSD
 *        Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

/*
 * Originally written by Julian Elischer (julian@dialix.oz.au)
 * for TRW Financial Systems for use under the MACH(2.5) operating system.
 *
 * TRW Financial Systems, in accordance with their agreement with Carnegie
 * Mellon University, makes this software available to CMU to distribute
 * or use in any manner that they see fit as long as this message is kept with
 * the software. For this reason TFS also grants any other persons or
 * organisations permission to use or modify this software.
 *
 * TFS supplies this software to be publicly redistributed
 * on the understanding that TFS is not responsible for the correct
 * functioning of this software in any circumstances.
 *
 * Ported to run under 386BSD by Julian Elischer (julian@dialix.oz.au) Sept 1992
 */

#define	SDRETRIES	4

struct sd_ops;

struct sd_softc {
	struct device sc_dev;
	struct disk sc_dk;

	int flags;
#define	SDF_LOCKED	0x01
#define	SDF_WANTED	0x02
#define	SDF_WLABEL	0x04		/* label is writable */
#define	SDF_LABELLING	0x08		/* writing label */
#define	SDF_ANCIENT	0x10		/* disk is ancient; for minphys */
#define	SDF_DIRTY	0x20		/* disk is dirty; needs cache flush */
#define	SDF_FLUSHING	0x40		/* flushing, for sddone() */
	struct scsi_link *sc_link;	/* contains our targ, lun, etc. */
	struct disk_parms {
		u_long	heads;		/* number of heads */
		u_long	cyls;		/* number of cylinders */
		u_long	sectors;	/* number of sectors/track */
		u_long	blksize;	/* number of bytes/sector */
		u_long	disksize;	/* total number sectors */
		u_long	rot_rate;	/* rotational rate, in RPM */
	} params;
	struct buf buf_queue;
	u_int8_t type;
        struct disk_name {
                char vendor[9];         /* disk vendor/manufacturer */
                char product[17];       /* disk product model */
                char revision[5];       /* drive/firmware revision */
        } name;
	const struct sd_ops *sc_ops;	/* our bus-dependent ops vector */

	void *sc_sdhook;		/* our shutdown hook */

#if NRND > 0
	rndsource_element_t rnd_source;
#endif
};

struct sd_ops {
	int	(*sdo_get_parms) __P((struct sd_softc *, struct disk_parms *,
		    int));
	void	(*sdo_flush) __P((struct sd_softc *, int));
};
#define	SDGP_RESULT_OK		0	/* paramters obtained */
#define	SDGP_RESULT_OFFLINE	1	/* no media, or otherwise losing */
#define	SDGP_RESULT_UNFORMATTED	2	/* unformatted media (max params) */