270 lines
6.6 KiB
C
270 lines
6.6 KiB
C
/* $NetBSD: sd.c,v 1.1 1997/02/04 03:52:53 thorpej Exp $ */
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/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Van Jacobson of Lawrence Berkeley Laboratory and the Systems
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* Programming Group of the University of Utah Computer Science Department.
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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 the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Utah $Hdr: sd.c 1.9 92/12/21$
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*
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* @(#)sd.c 8.1 (Berkeley) 6/10/93
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*/
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/*
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* SCSI CCS disk driver
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*/
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#include <sys/param.h>
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#include <sys/disklabel.h>
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#include <lib/libsa/stand.h>
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#include <hp300/stand/common/samachdep.h>
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#define _IOCTL_
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#include <hp300/dev/scsireg.h>
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struct disklabel sdlabel;
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struct sdminilabel {
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u_short npart;
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u_long offset[MAXPARTITIONS];
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};
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struct sd_softc {
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int sc_ctlr;
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int sc_unit;
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int sc_part;
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char sc_retry;
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char sc_alive;
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short sc_blkshift;
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struct sdminilabel sc_pinfo;
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} sd_softc[NSCSI][NSD];
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#define SDRETRY 2
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sdinit(ctlr, unit)
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int ctlr, unit;
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{
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register struct sd_softc *ss = &sd_softc[ctlr][unit];
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u_char stat;
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int capbuf[2];
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stat = scsi_test_unit_rdy(ctlr, unit);
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if (stat) {
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/* drive may be doing RTZ - wait a bit */
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if (stat == STS_CHECKCOND) {
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DELAY(1000000);
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stat = scsi_test_unit_rdy(ctlr, unit);
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}
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if (stat) {
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printf("sd(%d,%d,0,0): init failed (stat=%x)\n",
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ctlr, unit, stat);
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return (0);
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}
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}
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/*
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* try to get the drive block size.
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*/
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capbuf[0] = 0;
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capbuf[1] = 0;
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stat = scsi_read_capacity(ctlr, unit,
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(u_char *)capbuf, sizeof(capbuf));
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if (stat == 0) {
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if (capbuf[1] > DEV_BSIZE)
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for (; capbuf[1] > DEV_BSIZE; capbuf[1] >>= 1)
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++ss->sc_blkshift;
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}
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ss->sc_alive = 1;
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return (1);
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}
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sdreset(ctlr, unit)
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int ctlr, unit;
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{
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}
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#ifdef COMPAT_NOLABEL
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struct sdminilabel defaultpinfo = {
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8,
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{ 1024, 17408, 0, 17408, 115712, 218112, 82944, 115712 }
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};
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#endif
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char io_buf[MAXBSIZE];
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sdgetinfo(ss)
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register struct sd_softc *ss;
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{
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register struct sdminilabel *pi = &ss->sc_pinfo;
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register struct disklabel *lp = &sdlabel;
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char *msg, *getdisklabel();
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int sdstrategy(), err, savepart;
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size_t i;
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bzero((caddr_t)lp, sizeof *lp);
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lp->d_secsize = (DEV_BSIZE << ss->sc_blkshift);
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/* Disklabel is always from RAW_PART. */
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savepart = ss->sc_part;
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ss->sc_part = RAW_PART;
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err = sdstrategy(ss, F_READ, LABELSECTOR,
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lp->d_secsize ? lp->d_secsize : DEV_BSIZE, io_buf, &i);
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ss->sc_part = savepart;
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if (err) {
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printf("sdgetinfo: sdstrategy error %d\n", err);
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return(0);
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}
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msg = getdisklabel(io_buf, lp);
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if (msg) {
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printf("sd(%d,%d,%d): WARNING: %s, ",
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ss->sc_ctlr, ss->sc_unit, ss->sc_part, msg);
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#ifdef COMPAT_NOLABEL
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printf("using old default partitioning\n");
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*pi = defaultpinfo;
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#else
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printf("defining `c' partition as entire disk\n");
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pi->npart = 3;
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pi->offset[0] = pi->offset[1] = -1;
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pi->offset[2] = 0;
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#endif
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} else {
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pi->npart = lp->d_npartitions;
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for (i = 0; i < pi->npart; i++)
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pi->offset[i] = lp->d_partitions[i].p_size == 0 ?
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-1 : lp->d_partitions[i].p_offset;
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}
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return(1);
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}
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sdopen(f, ctlr, unit, part)
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struct open_file *f;
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int ctlr, unit, part;
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{
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register struct sd_softc *ss;
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#ifdef SD_DEBUG
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if (debug)
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printf("sdopen: ctlr=%d unit=%d part=%d\n",
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ctlr, unit, part);
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#endif
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if (ctlr >= NSCSI || scsialive(ctlr) == 0)
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return (EADAPT);
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if (unit >= NSD)
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return (ECTLR);
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ss = &sd_softc[ctlr][unit];
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ss->sc_part = part;
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ss->sc_unit = unit;
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ss->sc_ctlr = ctlr;
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if (ss->sc_alive == 0) {
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if (sdinit(ctlr, unit) == 0)
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return (ENXIO);
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if (sdgetinfo(ss) == 0)
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return (ERDLAB);
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}
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if (part != RAW_PART && /* always allow RAW_PART to be opened */
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(part >= ss->sc_pinfo.npart || ss->sc_pinfo.offset[part] == -1))
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return (EPART);
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f->f_devdata = (void *)ss;
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return (0);
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}
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sdclose(f)
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struct open_file *f;
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{
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struct sd_softc *ss = f->f_devdata;
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/*
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* Mark the disk `not alive' so that the disklabel
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* will be re-loaded at next open.
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*/
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bzero(ss, sizeof(sd_softc));
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f->f_devdata = NULL;
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return (0);
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}
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sdstrategy(ss, func, dblk, size, v_buf, rsize)
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register struct sd_softc *ss;
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int func;
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daddr_t dblk;
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size_t size;
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void *v_buf;
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size_t *rsize;
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{
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char *buf = v_buf;
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register int ctlr = ss->sc_ctlr;
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register int unit = ss->sc_unit;
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u_int nblk = size >> ss->sc_blkshift;
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daddr_t blk;
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char stat;
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if (size == 0)
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return(0);
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/*
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* Don't do partition translation on the `raw partition'.
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*/
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blk = (dblk + ((ss->sc_part == RAW_PART) ? 0 :
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ss->sc_pinfo.offset[ss->sc_part])) >> ss->sc_blkshift;
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ss->sc_retry = 0;
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#ifdef SD_DEBUG
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if (debug)
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printf("sdstrategy(%d,%d): size=%d blk=%d nblk=%d\n",
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ctlr, unit, size, blk, nblk);
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#endif
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retry:
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if (func == F_READ)
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stat = scsi_tt_read(ctlr, unit, buf, size, blk, nblk);
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else
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stat = scsi_tt_write(ctlr, unit, buf, size, blk, nblk);
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if (stat) {
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printf("sd(%d,%d,%d): block=%x, error=0x%x\n",
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ctlr, unit, ss->sc_part, blk, stat);
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if (++ss->sc_retry > SDRETRY)
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return(EIO);
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goto retry;
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}
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*rsize = size;
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return(0);
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}
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