Home | History | Annotate | Line # | Download | only in dev 
      1 /*	$NetBSD: ldvar.h,v 1.37 2025/04/13 02:34:02 rin 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 <sys/mutex.h>
     36 #include <sys/rndsource.h>
     37 
     38 #include <dev/dkvar.h> /* for dk_softc */
     39 
     40 struct ld_softc {
     41 	struct dk_softc	sc_dksc;
     42 	kmutex_t	sc_mutex;
     43 	kcondvar_t	sc_drain;
     44 
     45 	int		sc_queuecnt;	/* current h/w queue depth */
     46 	int		sc_ncylinders;	/* # cylinders */
     47 	int		sc_nheads;	/* # heads */
     48 	int		sc_nsectors;	/* # sectors per track */
     49 	uint64_t	sc_disksize512;
     50 
     51 	/*
     52 	 * The following are filled by hardware specific attachment code.
     53 	 */
     54 	device_t	sc_dv;
     55 	int		sc_flags;	/* control flags */
     56 	uint64_t	sc_secperunit;	/* # sectors in total */
     57 	int		sc_secsize;	/* sector size in bytes */
     58 	int		sc_physsecsize;	/* physical sector size in bytes */
     59 	uint32_t	sc_alignedsec;	/* first physically-aligned LBA */
     60 	int		sc_maxxfer;	/* max xfer size in bytes */
     61 	int		sc_maxqueuecnt;	/* maximum h/w queue depth */
     62 	char		*sc_typename;	/* inquiry data */
     63 
     64 	int		(*sc_dump)(struct ld_softc *, void *, daddr_t, int);
     65 	int		(*sc_ioctl)(struct ld_softc *, u_long, void *, int32_t, bool);
     66 	int		(*sc_start)(struct ld_softc *, struct buf *);
     67 	int		(*sc_discard)(struct ld_softc *, struct buf *);
     68 };
     69 
     70 /* sc_flags */
     71 #define	LDF_ENABLED	0x001		/* device enabled */
     72 #define	LDF_UNUSED0	0x020		/* was LDF_DRAIN */
     73 #define	LDF_NO_RND	0x040		/* do not attach rnd source */
     74 #define	LDF_MPSAFE	0x080		/* backend is MPSAFE */
     75 #define	LDF_SUSPEND	0x100		/* disk is suspended until resume */
     76 
     77 int	ldadjqparam(struct ld_softc *, int);
     78 void	ldattach(struct ld_softc *, const char *);
     79 int	ldbegindetach(struct ld_softc *, int);
     80 void	ldenddetach(struct ld_softc *);
     81 void	lddone(struct ld_softc *, struct buf *);
     82 void	lddiscardend(struct ld_softc *, struct buf *);
     83 
     84 #endif	/* !_DEV_LDVAR_H_ */
     85