169 lines
6.5 KiB
C
169 lines
6.5 KiB
C
/* $NetBSD: xdvar.h,v 1.5 1998/01/26 21:03:43 gwr Exp $ */
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/*
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*
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* Copyright (c) 1995 Charles D. Cranor
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Charles D. Cranor.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* x d v a r . h
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*
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* this file defines the software structure we use to control the
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* 753/7053.
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*
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* author: Chuck Cranor <chuck@ccrc.wustl.edu>
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*/
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/*
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* i/o request: wrapper for hardware's iopb data structure
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*/
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struct xd_iorq {
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struct xd_iopb *iopb; /* address of matching iopb */
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struct xdc_softc *xdc; /* who we are working with */
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struct xd_softc *xd; /* which disk */
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int ttl; /* time to live */
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int mode; /* current mode (state+other data) */
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int tries; /* number of times we have tried it */
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int errno; /* error number if we fail */
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int lasterror; /* last error we got */
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int blockno; /* starting block no for this xfer */
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int sectcnt; /* number of sectors in xfer */
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char *dbuf; /* KVA of data buffer (advances) */
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char *dbufbase; /* base of dbuf */
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struct buf *buf; /* for NORM */
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};
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/*
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* state
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*/
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#define XD_SUB_MASK 0xf0 /* mask bits for state */
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#define XD_SUB_FREE 0x00 /* free */
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#define XD_SUB_NORM 0x10 /* normal I/O request */
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#define XD_SUB_WAIT 0x20 /* normal I/O request in the
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context of a process */
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#define XD_SUB_POLL 0x30 /* polled mode */
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#define XD_SUB_DONE 0x40 /* not active, but can't be free'd yet */
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#define XD_SUB_NOQ 0x50 /* don't queue, just submit (internal) */
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#define XD_STATE(X) ((X) & XD_SUB_MASK) /* extract state from mode */
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#define XD_NEWSTATE(OLD, NEW) (((OLD) & ~XD_SUB_MASK) |(NEW)) /* new state */
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/*
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* other mode data
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*/
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#define XD_MODE_VERBO 0x08 /* print error messages */
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#define XD_MODE_B144 0x04 /* handling a bad144 sector */
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/*
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* software timers and flags
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*/
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#define XDC_SUBWAITLIM 4 /* max number of "done" IOPBs there can be
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where we still allow a SUB_WAIT command */
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#define XDC_TICKCNT (5*hz) /* call xdc_tick on this interval (5 sec) */
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#define XDC_MAXTTL 2 /* max number of xd ticks to live */
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#define XDC_NOUNIT (-1) /* for xdcmd: no unit number */
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/*
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* a "xd_softc" structure contains per-disk state info.
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*/
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struct xd_softc {
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struct device sc_dev; /* device struct, reqd by autoconf */
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struct disk sc_dk; /* generic disk info */
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struct xdc_softc *parent; /* parent */
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u_short flags; /* flags */
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u_short state; /* device state */
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int xd_drive; /* unit number */
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/* geometry */
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u_short ncyl, acyl, pcyl; /* number of cyl's */
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u_short sectpercyl; /* nhead*nsect */
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u_char nhead; /* number of heads */
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u_char nsect; /* number of sectors per track */
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u_char hw_spt; /* as above, but includes spare sectors */
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struct dkbad dkb; /* bad144 sectors */
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};
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/*
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* flags
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*/
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#define XD_WLABEL 0x0001 /* write label */
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/*
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* state
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*/
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#define XD_DRIVE_UNKNOWN 0 /* never talked to it */
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#define XD_DRIVE_ATTACHING 1 /* attach in progress */
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#define XD_DRIVE_NOLABEL 2 /* drive on-line, no label */
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#define XD_DRIVE_ONLINE 3 /* drive is on-line */
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/*
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* a "xdc_softc" structure contains per-disk-controller state info,
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* including a list of active controllers.
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*/
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struct xdc_softc {
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struct device sc_dev; /* device struct, reqd by autoconf */
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struct evcnt sc_intrcnt; /* event counter (for vmstat -i) */
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struct xdc *xdc; /* vaddr of vme registers */
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int bustype; /* from attach args */
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int ipl; /* interrupt level */
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int vector; /* interrupt vector */
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struct xd_softc *sc_drives[XDC_MAXDEV]; /* drives on this controller */
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struct xd_iorq *reqs; /* i/o requests */
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struct xd_iopb *iopbase; /* iopb base addr (maps iopb->iorq) */
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struct xd_iopb *dvmaiopb; /* iopb base in DVMA space, not kvm */
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struct buf sc_wq; /* queue'd IOPBs for this controller */
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char freereq[XDC_MAXIOPB]; /* free list (stack) */
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char waitq[XDC_MAXIOPB]; /* wait queue */
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u_char nfree; /* number of iopbs free */
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u_char nrun; /* number running */
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u_char nwait; /* number of waiting iopbs */
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u_char ndone; /* number of done IORQs */
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u_char waithead; /* head of queue */
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u_char waitend; /* end of queue */
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};
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/*
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* reset blast modes
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*/
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#define XD_RSET_NONE (-1) /* restart all requests */
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#define XD_RSET_ALL (-2) /* don't restart anything */
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