150 lines
4.2 KiB
C
150 lines
4.2 KiB
C
/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1990 The Regents of the University of California.
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* 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 1.2 90/01/23
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* from: @(#)sd.c 7.4 (Berkeley) 5/5/91
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* $Id: sd.c,v 1.3 1993/08/01 19:25:21 mycroft Exp $
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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 "saio.h"
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#include "samachdep.h"
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#include "../dev/scsireg.h"
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struct sd_softc {
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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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} sd_softc[NSD];
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int sdpartoff[] = {
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1024, 17408, 0, 17408,
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115712, 218112, 82944, 0
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};
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#define SDRETRY 2
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sdinit(unit)
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register int unit;
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{
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register struct sd_softc *ss;
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u_char stat;
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int capbuf[2];
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if (unit > NSD)
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return (0);
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ss = &sd_softc[unit];
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/* NB: HP6300 won't boot if next printf is removed (???) - vj */
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printf("sd%d: ", unit);
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if ((stat = scsi_test_unit_rdy(unit)) == 0) {
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/* drive may be doing RTZ - wait a bit */
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printf("not ready - retrying ... ");
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if (stat == STS_CHECKCOND) {
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DELAY(1000000);
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if (scsi_test_unit_rdy(unit) == 0) {
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printf("giving up.\n");
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return (0);
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}
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}
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}
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printf("unit ready.\n");
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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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if (scsi_read_capacity(unit, (u_char *)capbuf, sizeof(capbuf)) != 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(unit)
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{
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}
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sdopen(io)
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struct iob *io;
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{
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register int unit = io->i_unit;
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register struct sd_softc *ss = &sd_softc[unit];
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struct sdinfo *ri;
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if (scsialive(unit) == 0)
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_stop("scsi controller not configured");
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if (ss->sc_alive == 0)
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if (sdinit(unit) == 0)
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_stop("sd init failed");
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if (io->i_boff < 0 || io->i_boff > 7)
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_stop("sd bad minor");
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io->i_boff = sdpartoff[io->i_boff];
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}
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sdstrategy(io, func)
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register struct iob *io;
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register int func;
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{
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register int unit = io->i_unit;
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register struct sd_softc *ss = &sd_softc[unit];
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char stat;
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daddr_t blk = io->i_bn >> ss->sc_blkshift;
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u_int nblk = io->i_cc >> ss->sc_blkshift;
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ss->sc_retry = 0;
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retry:
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if (func == F_READ)
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stat = scsi_tt_read(unit, io->i_ma, io->i_cc, blk, nblk);
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else
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stat = scsi_tt_write(unit, io->i_ma, io->i_cc, blk, nblk);
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if (stat) {
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printf("sd(%d,?) err: 0x%x\n", unit, stat);
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if (++ss->sc_retry > SDRETRY)
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return(-1);
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else
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goto retry;
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}
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return(io->i_cc);
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}
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