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ldvar.h revision 1.19 
      1 /*	$NetBSD: ldvar.h,v 1.19 2011/11/19 22:51:22 tls Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2000 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Andrew Doran.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef	_DEV_LDVAR_H_
     33 #define	_DEV_LDVAR_H_
     34 
     35 #include "rnd.h"
     36 
     37 #include <sys/mutex.h>
     38 #include <sys/device.h>	/* for device_t */
     39 #if NRND > 0
     40 #include <sys/rnd.h>
     41 #endif
     42 
     43 struct ld_softc {
     44 	device_t sc_dv;
     45 	struct	disk sc_dk;
     46 	struct	bufq_state *sc_bufq;
     47 	kmutex_t sc_mutex;
     48 #if NRND > 0
     49 	krndsource_t	sc_rnd_source;
     50 #endif
     51 	int	sc_queuecnt;		/* current h/w queue depth */
     52 	int	sc_ncylinders;		/* # cylinders */
     53 	int	sc_nheads;		/* # heads */
     54 	int	sc_nsectors;		/* # sectors per track */
     55 	int	sc_disksize512;
     56 
     57 	/*
     58 	 * The following are filled by hardware specific attachment code.
     59 	 */
     60 	int	sc_flags;		/* control flags */
     61 	uint64_t	sc_secperunit;		/* # sectors in total */
     62 	int	sc_secsize;		/* sector size in bytes */
     63 	int	sc_maxxfer;		/* max xfer size in bytes */
     64 	int	sc_maxqueuecnt;		/* maximum h/w queue depth */
     65 
     66 	int	(*sc_dump)(struct ld_softc *, void *, int, int);
     67 	int	(*sc_flush)(struct ld_softc *, int);
     68 	int	(*sc_start)(struct ld_softc *, struct buf *);
     69 };
     70 
     71 /* sc_flags */
     72 #define	LDF_ENABLED	0x001		/* device enabled */
     73 #define	LDF_WLABEL	0x008		/* label is writable */
     74 #define	LDF_LABELLING	0x010		/* writing label */
     75 #define	LDF_DRAIN	0x020		/* maxqueuecnt has changed; drain */
     76 #define	LDF_DETACH	0x040		/* detach pending */
     77 #define	LDF_KLABEL	0x080		/* keep label on close */
     78 #define	LDF_VLABEL	0x100		/* label is valid */
     79 
     80 /* sc_flush() flags */
     81 #define	LDFL_POLL	0x001		/* poll for completion */
     82 
     83 int	ldadjqparam(struct ld_softc *, int);
     84 void	ldattach(struct ld_softc *);
     85 int	ldbegindetach(struct ld_softc *, int);
     86 void	ldenddetach(struct ld_softc *);
     87 void	lddone(struct ld_softc *, struct buf *);
     88 
     89 #endif	/* !_DEV_LDVAR_H_ */
     90