usr/src/sys/hp300/stand/sd.c

/*
 * 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.att/saio.h>
#include <hp300/stand/samachdep.h>

#include <hp300/dev/scsireg.h>

struct  disklabel sdlabel;

struct  sdminilabel {
        u_short npart;
        u_long  offset[MAXPARTITIONS];
};

struct  sd_softc {
        char    sc_retry;
        char    sc_alive;
        short   sc_blkshift;
        struct  sdminilabel sc_pinfo;
} sd_softc[NSCSI][NSD];

#define SDRETRY         2

sdinit(ctlr, unit)
        int ctlr, unit;
{
        register struct sd_softc *ss = &sd_softc[ctlr][unit];
        u_char stat;
        int capbuf[2];

        stat = scsi_test_unit_rdy(ctlr, unit);
        if (stat) {
                /* drive may be doing RTZ - wait a bit */
                if (stat == STS_CHECKCOND) {
                        DELAY(1000000);
                        stat = scsi_test_unit_rdy(ctlr, unit);
                }
                if (stat) {
                        printf("sd(%d,%d,0,0): init failed (stat=%x)\n",
                               ctlr, unit, stat);
                        return (0);
                }
        }
        /*
         * try to get the drive block size.
         */
        capbuf[0] = 0;
        capbuf[1] = 0;
        stat = scsi_read_capacity(ctlr, unit,
                                  (u_char *)capbuf, sizeof(capbuf));
        if (stat == 0) {
                if (capbuf[1] > DEV_BSIZE)
                        for (; capbuf[1] > DEV_BSIZE; capbuf[1] >>= 1)
                                ++ss->sc_blkshift;
        }
        ss->sc_alive = 1;
        return (1);
}

sdreset(ctlr, unit)
        int ctlr, unit;
{
}

#ifdef COMPAT_NOLABEL
struct  sdminilabel defaultpinfo = {
        8,
        { 1024, 17408, 0, 17408, 115712, 218112, 82944, 115712 }
};
#endif

sdgetinfo(io)
        register struct iob *io;
{
        struct sd_softc *ss = &sd_softc[io->i_adapt][io->i_ctlr];
        register struct sdminilabel *pi = &ss->sc_pinfo;
        register struct disklabel *lp = &sdlabel;
        char *msg, *readdisklabel();
        int sdstrategy(), i;

        bzero((caddr_t)lp, sizeof *lp);
        lp->d_secsize = (DEV_BSIZE << ss->sc_blkshift);
        msg = readdisklabel(io, sdstrategy, lp);
        if (msg) {
                printf("sd(%d,%d,%d,%d): WARNING: %s, ",
                       io->i_adapt, io->i_ctlr, io->i_unit, io->i_part, msg);
#ifdef COMPAT_NOLABEL
                printf("using old default partitioning\n");
                *pi = defaultpinfo;
#else
                printf("defining `c' partition as entire disk\n");
                pi->npart = 3;
                pi->offset[0] = pi->offset[1] = -1;
                pi->offset[2] = 0;
#endif
        } else {
                pi->npart = lp->d_npartitions;
                for (i = 0; i < pi->npart; i++)
                        pi->offset[i] = lp->d_partitions[i].p_size == 0 ?
                                -1 : lp->d_partitions[i].p_offset;
        }
        return(1);
}

sdopen(io)
        struct iob *io;
{
        register struct sd_softc *ss;
        int ctlr, unit, part;

        devconvert(io);

        ctlr = io->i_adapt;
        if (ctlr >= NSCSI || scsialive(ctlr) == 0)
                return (EADAPT);
        unit = io->i_ctlr;
        if (unit >= NSD)
                return (ECTLR);
        ss = &sd_softc[ctlr][unit];
        if (ss->sc_alive == 0) {
                if (sdinit(ctlr, unit) == 0)
                        return (ENXIO);
                if (sdgetinfo(io) == 0)
                        return (ERDLAB);
        }
        part = io->i_part;
        if (part >= ss->sc_pinfo.npart || ss->sc_pinfo.offset[part] == -1)
                return (EPART);
        io->i_boff = ss->sc_pinfo.offset[part];
        return (0);
}

sdstrategy(io, func)
        register struct iob *io;
        int func;
{
        register int ctlr = io->i_adapt;
        register int unit = io->i_ctlr;
        register struct sd_softc *ss = &sd_softc[ctlr][unit];
        daddr_t blk = io->i_bn >> ss->sc_blkshift;
        u_int nblk = io->i_cc >> ss->sc_blkshift;
        char stat;

        if (io->i_cc == 0)
                return(0);

        ss->sc_retry = 0;
retry:
        if (func == F_READ)
                stat = scsi_tt_read(ctlr, unit, io->i_ma, io->i_cc, blk, nblk);
        else
                stat = scsi_tt_write(ctlr, unit, io->i_ma, io->i_cc, blk, nblk);
        if (stat) {
                printf("sd(%d,%d,%d,%d): block=%x, error=0x%x\n",
                       ctlr, unit, io->i_unit, io->i_part, blk, stat);
                if (++ss->sc_retry > SDRETRY)
                        return(-1);
                goto retry;
        }
        return(io->i_cc);
}