/*
* Copyright (c) 1995 Charles D. Cranor
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* x d v a r . h
*
* this file defines the software structure we use to control the
* 753/7053.
*
* author: Chuck Cranor <chuck@netbsd>
*/
#include <sys/callout.h>
/*
* i/o request: wrapper for hardware's iopb data structure
*/
struct xd_iorq {
struct xd_iopb *iopb; /* address of matching iopb */
struct xd_iopb *dmaiopb; /* DMA address of above */
struct xdc_softc *xdc; /* who we are working with */
struct xd_softc *xd; /* which disk */
int ttl; /* time to live */
int mode; /* current mode (state+other data) */
int tries; /* number of times we have tried it */
int errnum; /* error number if we fail */
int lasterror; /* last error we got */
int blockno; /* starting block no for this xfer */
int sectcnt; /* number of sectors in xfer */
char *dbuf; /* KVA of data buffer (advances) */
struct buf *buf; /* for NORM */
bus_dmamap_t dmamap; /* DMA I/O handle */
};
/*
* state
*/
#define XD_SUB_MASK 0xf0 /* mask bits for state */
#define XD_SUB_FREE 0x00 /* free */
#define XD_SUB_NORM 0x10 /* normal I/O request */
#define XD_SUB_WAIT 0x20 /* normal I/O request in the
context of a process */
#define XD_SUB_POLL 0x30 /* polled mode */
#define XD_SUB_DONE 0x40 /* not active, but can't be free'd yet */
#define XD_SUB_NOQ 0x50 /* don't queue, just submit (internal) */
#define XD_STATE(X) ((X) & XD_SUB_MASK) /* extract state from mode */
#define XD_NEWSTATE(OLD, NEW) (((OLD) & ~XD_SUB_MASK) |(NEW)) /* new state */
#define XDC_SUBWAITLIM 4 /* max number of "done" IOPBs there can be
where we still allow a SUB_WAIT command */
#define XDC_TICKCNT (5*hz) /* call xdc_tick on this interval (5 sec) */
#define XDC_MAXTTL 2 /* max number of xd ticks to live */
#define XDC_NOUNIT (-1) /* for xdcmd: no unit number */
/*
* a "xd_softc" structure contains per-disk state info.
*/
struct xd_softc {
device_t sc_dev; /* device struct, reqd by autoconf */
struct disk sc_dk; /* generic disk info */
struct xdc_softc *parent; /* parent */
u_short flags; /* flags */
u_short state; /* device state */
int xd_drive; /* unit number */
/* geometry */
u_short ncyl, acyl, pcyl; /* number of cyl's */
u_short sectpercyl; /* nhead*nsect */
u_char nhead; /* number of heads */
u_char nsect; /* number of sectors per track */
u_char hw_spt; /* as above, but includes spare sectors */
struct dkbad dkb; /* bad144 sectors */
};
struct xd_softc *sc_drives[XDC_MAXDEV]; /* drives on this controller */
int ipl; /* interrupt level */
int vector; /* interrupt vector */
bus_dma_tag_t dmatag; /* Bus DMA tag */
struct xd_iorq *reqs; /* i/o requests */
struct xd_iopb *iopbase; /* iopb base addr (maps iopb->iorq) */
struct xd_iopb *dvmaiopb; /* iopb base in DVMA space, not kvm */
bus_dmamap_t iopmap; /* IOPB DMA handle */
bus_dmamap_t auxmap; /* auxiliary DMA handle */
struct bufq_state *sc_wq; /* queued IOPBs for this controller */
char freereq[XDC_MAXIOPB]; /* free list (stack) */
char waitq[XDC_MAXIOPB]; /* wait queue */
u_char nfree; /* number of iopbs free */
u_char nrun; /* number running */
u_char nwait; /* number of waiting iopbs */
u_char ndone; /* number of done IORQs */
u_char waithead; /* head of queue */
u_char waitend; /* end of queue */
};
