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/* $NetBSD: sd.c,v 1.4 1995/08/29 21:55:50 phil Exp $ */
/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Van Jacobson of Lawrence Berkeley Laboratory and the Systems
* Programming Group of the University of Utah Computer Science Department.
*
* 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 University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
*
* from: Utah $Hdr: sd.c 1.9 92/12/21$
*
* @(#)sd.c 8.1 (Berkeley) 6/10/93
*/
/*
* SCSI CCS disk driver
*/
#include <sys/param.h>
#include <sys/disklabel.h>
#include "stand.h"
#include "samachdep.h"
struct sd_softc {
int sc_ctlr;
int sc_unit;
int sc_part;
char sc_retry;
char sc_alive;
struct disklabel sc_label;
} sd_softc[NSCSI][NSD];
#ifdef SD_DEBUG
int debug = SD_DEBUG;
#endif
#define SDRETRY 2
sdinit(ctlr, unit)
int ctlr, unit;
{
register struct sd_softc *ss = &sd_softc[ctlr][unit];
/* HP version does test_unit_ready
* followed by read_capacity to get blocksize
*/
ss->sc_alive = 1;
return (1);
}
sdreset(ctlr, unit)
int ctlr, unit;
{
}
char io_buf[MAXBSIZE];
sdgetinfo(ss)
register struct sd_softc *ss;
{
register struct disklabel *lp;
char *msg, *getdisklabel();
int sdstrategy(), i, err;
lp = &sd_softc[ss->sc_ctlr][ss->sc_unit].sc_label;
bzero((caddr_t)lp, sizeof *lp);
lp->d_secsize = DEV_BSIZE;
lp->d_secpercyl = 1;
lp->d_npartitions = MAXPARTITIONS;
lp->d_partitions[ss->sc_part].p_offset = 0;
lp->d_partitions[ss->sc_part].p_size = 0x7fffffff;
if (err = sdstrategy(ss, F_READ,
LABELSECTOR, DEV_BSIZE, io_buf, &i) < 0) {
printf("sdgetinfo: sdstrategy error %d\n", err);
return 0;
}
msg = getdisklabel(io_buf, lp);
if (msg) {
printf("sd(%d,%d,%d): %s\n",
ss->sc_ctlr, ss->sc_unit, ss->sc_part, msg);
return 0;
}
return(1);
}
sdopen(f, ctlr, unit, part)
struct open_file *f;
int ctlr, unit, part;
{
register struct sd_softc *ss;
register struct disklabel *lp;
#ifdef SD_DEBUG
if (debug)
printf("sdopen: ctlr=%d unit=%d part=%d\n",
ctlr, unit, part);
#endif
if (ctlr >= NSCSI || !scsialive(ctlr))
return (EADAPT);
if (unit >= NSD)
return (ECTLR);
ss = &sd_softc[ctlr][unit]; /* XXX alloc()? keep pointers? */
ss->sc_part = part;
ss->sc_unit = unit;
ss->sc_ctlr = ctlr;
if (!ss->sc_alive) {
if (!sdinit(ctlr, unit))
return (ENXIO);
if (!sdgetinfo(ss))
return (ERDLAB);
}
lp = &sd_softc[ctlr][unit].sc_label;
if (part >= lp->d_npartitions || lp->d_partitions[part].p_size == 0)
return (EPART);
f->f_devdata = (void *)ss;
return (0);
}
int
sdstrategy(ss, func, dblk, size, buf, rsize)
register struct sd_softc *ss;
int func;
daddr_t dblk; /* block number */
u_int size; /* request size in bytes */
char *buf;
u_int *rsize; /* out: bytes transferred */
{
register int ctlr = ss->sc_ctlr;
register int unit = ss->sc_unit;
register int part = ss->sc_part;
register struct partition *pp = &ss->sc_label.d_partitions[part];
u_int nblk = size >> DEV_BSHIFT;
u_int blk = dblk + pp->p_offset;
char stat;
if (size == 0)
return(0);
ss->sc_retry = 0;
#ifdef SD_DEBUG
if (debug)
printf("sdstrategy(%d,%d): size=%d blk=%d nblk=%d\n",
ctlr, unit, size, blk, nblk);
#endif
retry:
if (func == F_READ)
stat = scsi_tt_read(ctlr, unit, buf, size, blk, nblk);
else
stat = scsi_tt_write(ctlr, unit, buf, size, blk, nblk);
if (stat) {
printf("sd(%d,%d,%d): block=%x, error=0x%x\n",
ctlr, unit, ss->sc_part, blk, stat);
if (++ss->sc_retry > SDRETRY)
return(EIO);
goto retry;
}
*rsize = size;
return(0);
}
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