248 lines
6.2 KiB
C
248 lines
6.2 KiB
C
/* $NetBSD: sd.c,v 1.1 1996/08/02 11:22:36 ragge 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 "stand.h"
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#include "samachdep.h"
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#define SC_DEBUG 1 /* bertram */
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#define SD_DEBUG 1 /* bertram */
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/*----------------------------------------------------------------------*/
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int
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scsialive(int ctlr)
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{
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return 1; /* controller always alive! */
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}
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/* call functions in scsi_hi.c */
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#include "so.h"
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int
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scsi_tt_read(ctlr, slave, buf, len, blk, nblk)
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int ctlr, slave;
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u_char *buf;
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u_int len;
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daddr_t blk;
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u_int nblk;
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{
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#ifdef SC_DEBUG
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printf("scsi_tt_read: ctlr %d, slave %d, len %d, blk %d, nblk %d\n",
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ctlr, slave, len, blk, nblk );
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#endif
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if (sc_rdwt(DISK_READ, blk, buf, nblk, 1<<slave, 0) == 0)
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return 0;
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return -2;
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}
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int
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scsi_tt_write(ctlr, slave, buf, len, blk, nblk)
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int ctlr, slave;
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u_char *buf;
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u_int len;
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daddr_t blk;
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u_int nblk;
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{
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#ifdef SC_DEBUG
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printf("scsi_tt_write: ctlr %d, slave %d, len %d, blk %d, nblk %d\n",
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ctlr, slave, len, blk, nblk );
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#endif
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#if 0
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if (sc_rdwt(DISK_WRITE, blk, buf, nblk, 1<<slave, 0) == 0)
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return 0;
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#endif
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return -2;
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}
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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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struct disklabel sc_label;
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} sd_softc[NSCSI][NSD];
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#ifdef SD_DEBUG
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int debug = SD_DEBUG;
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#endif
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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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/* HP version does test_unit_ready
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* followed by read_capacity to get blocksize
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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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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 disklabel *lp;
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char *msg, *getdisklabel();
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int sdstrategy(), i, err;
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lp = &sd_softc[ss->sc_ctlr][ss->sc_unit].sc_label;
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bzero((caddr_t)lp, sizeof *lp);
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lp->d_secsize = DEV_BSIZE;
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lp->d_secpercyl = 1;
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lp->d_npartitions = MAXPARTITIONS;
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lp->d_partitions[ss->sc_part].p_offset = 0;
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lp->d_partitions[ss->sc_part].p_size = 0x7fffffff;
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if (err = sdstrategy(ss, F_READ,
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LABELSECTOR, DEV_BSIZE, io_buf, &i) < 0) {
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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): %s\n",
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ss->sc_ctlr, ss->sc_unit, ss->sc_part, msg);
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return 0;
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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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register struct disklabel *lp;
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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))
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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]; /* XXX alloc()? keep pointers? */
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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) {
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if (!sdinit(ctlr, unit))
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return (ENXIO);
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if (!sdgetinfo(ss))
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return (ERDLAB);
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}
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lp = &sd_softc[ctlr][unit].sc_label;
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if (part >= lp->d_npartitions || lp->d_partitions[part].p_size == 0)
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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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int
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sdstrategy(ss, func, dblk, size, buf, rsize)
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register struct sd_softc *ss;
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int func;
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daddr_t dblk; /* block number */
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u_int size; /* request size in bytes */
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char *buf;
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u_int *rsize; /* out: bytes transferred */
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{
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register int ctlr = ss->sc_ctlr;
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register int unit = ss->sc_unit;
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register int part = ss->sc_part;
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register struct partition *pp = &ss->sc_label.d_partitions[part];
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u_int nblk = size >> DEV_BSHIFT;
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u_int blk = dblk + pp->p_offset;
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char stat;
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if (size == 0)
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return(0);
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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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