444 lines
10 KiB
C
444 lines
10 KiB
C
/* $NetBSD: hp.c,v 1.24 2000/06/04 18:04:38 ragge Exp $ */
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/*
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* Copyright (c) 1996 Ludd, University of Lule}, Sweden.
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* All rights reserved.
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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 at Ludd, University of
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* Lule}, Sweden and its contributors.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Simple device driver routine for massbuss disks.
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* TODO:
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* Fix support for Standard DEC BAD144 bad block forwarding.
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* Be able to to handle soft/hard transfer errors.
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* Handle non-data transfer interrupts.
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* Autoconfiguration of disk drives 'on the fly'.
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* Handle disk media changes.
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* Dual-port operations should be supported.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/disklabel.h>
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#include <sys/disk.h>
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#include <sys/dkio.h>
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#include <sys/buf.h>
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#include <sys/stat.h>
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#include <sys/ioccom.h>
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#include <sys/fcntl.h>
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#include <sys/syslog.h>
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#include <sys/reboot.h>
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#include <sys/conf.h>
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#include <machine/bus.h>
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#include <machine/trap.h>
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#include <machine/pte.h>
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#include <machine/mtpr.h>
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#include <machine/cpu.h>
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#include <vax/mba/mbavar.h>
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#include <vax/mba/mbareg.h>
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#include <vax/mba/hpreg.h>
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#include "ioconf.h"
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#include "locators.h"
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struct hp_softc {
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struct device sc_dev;
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struct disk sc_disk;
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_ioh;
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struct mba_device sc_md; /* Common struct used by mbaqueue. */
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int sc_wlabel; /* Disklabel area is writable */
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};
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int hpmatch(struct device *, struct cfdata *, void *);
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void hpattach(struct device *, struct device *, void *);
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void hpstart(struct mba_device *);
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int hpattn(struct mba_device *);
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enum xfer_action hpfinish(struct mba_device *, int, int *);
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bdev_decl(hp);
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cdev_decl(hp);
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struct cfattach hp_ca = {
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sizeof(struct hp_softc), hpmatch, hpattach
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};
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#define HP_WCSR(reg, val) \
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bus_space_write_4(sc->sc_iot, sc->sc_ioh, (reg), (val))
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#define HP_RCSR(reg) \
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bus_space_read_4(sc->sc_iot, sc->sc_ioh, (reg))
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/*
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* Check if this is a disk drive; done by checking type from mbaattach.
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*/
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int
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hpmatch(struct device *parent, struct cfdata *cf, void *aux)
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{
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struct mba_attach_args *ma = aux;
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if (cf->cf_loc[MBACF_DRIVE] != MBACF_DRIVE_DEFAULT &&
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cf->cf_loc[MBACF_DRIVE] != ma->ma_unit)
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return 0;
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if (ma->ma_devtyp != MB_RP)
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return 0;
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return 1;
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}
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/*
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* Disk drive found; fake a disklabel and try to read the real one.
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* If the on-disk label can't be read; we lose.
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*/
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void
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hpattach(struct device *parent, struct device *self, void *aux)
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{
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struct hp_softc *sc = (void *)self;
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struct mba_softc *ms = (void *)parent;
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struct disklabel *dl;
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struct mba_attach_args *ma = aux;
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char *msg;
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sc->sc_iot = ma->ma_iot;
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sc->sc_ioh = ma->ma_ioh;
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/*
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* Init the common struct for both the adapter and its slaves.
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*/
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BUFQ_INIT(&sc->sc_md.md_q);
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sc->sc_md.md_softc = (void *)sc; /* Pointer to this softc */
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sc->sc_md.md_mba = (void *)parent; /* Pointer to parent softc */
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sc->sc_md.md_start = hpstart; /* Disk start routine */
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sc->sc_md.md_attn = hpattn; /* Disk attention routine */
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sc->sc_md.md_finish = hpfinish; /* Disk xfer finish routine */
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ms->sc_md[ma->ma_unit] = &sc->sc_md; /* Per-unit backpointer */
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/*
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* Init and attach the disk structure.
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*/
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sc->sc_disk.dk_name = sc->sc_dev.dv_xname;
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disk_attach(&sc->sc_disk);
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/*
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* Fake a disklabel to be able to read in the real label.
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*/
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dl = sc->sc_disk.dk_label;
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dl->d_secsize = DEV_BSIZE;
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dl->d_ntracks = 1;
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dl->d_nsectors = 32;
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dl->d_secpercyl = 32;
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/*
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* Read in label.
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*/
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if ((msg = readdisklabel(makedev(0, self->dv_unit * 8), hpstrategy,
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dl, NULL)) != NULL)
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printf(": %s", msg);
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printf(": %s, size = %d sectors\n", dl->d_typename, dl->d_secperunit);
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}
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void
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hpstrategy(struct buf *bp)
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{
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struct hp_softc *sc;
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struct buf *gp;
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int unit, s, err;
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struct disklabel *lp;
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unit = DISKUNIT(bp->b_dev);
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sc = hp_cd.cd_devs[unit];
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lp = sc->sc_disk.dk_label;
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err = bounds_check_with_label(bp, lp, sc->sc_wlabel);
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if (err < 0)
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goto done;
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bp->b_rawblkno =
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bp->b_blkno + lp->d_partitions[DISKPART(bp->b_dev)].p_offset;
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bp->b_cylinder = bp->b_rawblkno / lp->d_secpercyl;
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s = splbio();
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gp = BUFQ_FIRST(&sc->sc_md.md_q);
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disksort_cylinder(&sc->sc_md.md_q, bp);
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if (gp == 0)
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mbaqueue(&sc->sc_md);
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splx(s);
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return;
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done:
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bp->b_resid = bp->b_bcount;
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biodone(bp);
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}
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/*
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* Start transfer on given disk. Called from mbastart().
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*/
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void
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hpstart(struct mba_device *md)
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{
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struct hp_softc *sc = md->md_softc;
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struct disklabel *lp = sc->sc_disk.dk_label;
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struct buf *bp = BUFQ_FIRST(&md->md_q);
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unsigned bn, cn, sn, tn;
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/*
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* Collect statistics.
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*/
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disk_busy(&sc->sc_disk);
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sc->sc_disk.dk_seek++;
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bn = bp->b_rawblkno;
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if (bn) {
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cn = bn / lp->d_secpercyl;
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sn = bn % lp->d_secpercyl;
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tn = sn / lp->d_nsectors;
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sn = sn % lp->d_nsectors;
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} else
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cn = sn = tn = 0;
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HP_WCSR(HP_DC, cn);
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HP_WCSR(HP_DA, (tn << 8) | sn);
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if (bp->b_flags & B_READ)
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HP_WCSR(HP_CS1, HPCS_READ);
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else
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HP_WCSR(HP_CS1, HPCS_WRITE);
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}
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int
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hpopen(dev_t dev, int flag, int fmt, struct proc *p)
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{
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struct hp_softc *sc;
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int unit, part;
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unit = DISKUNIT(dev);
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if (unit >= hp_cd.cd_ndevs)
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return ENXIO;
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sc = hp_cd.cd_devs[unit];
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if (sc == 0)
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return ENXIO;
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part = DISKPART(dev);
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if (part >= sc->sc_disk.dk_label->d_npartitions)
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return ENXIO;
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switch (fmt) {
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case S_IFCHR:
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sc->sc_disk.dk_copenmask |= (1 << part);
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break;
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case S_IFBLK:
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sc->sc_disk.dk_bopenmask |= (1 << part);
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break;
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}
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sc->sc_disk.dk_openmask =
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sc->sc_disk.dk_copenmask | sc->sc_disk.dk_bopenmask;
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return 0;
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}
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int
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hpclose(dev_t dev, int flag, int fmt, struct proc *p)
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{
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struct hp_softc *sc;
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int unit, part;
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unit = DISKUNIT(dev);
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sc = hp_cd.cd_devs[unit];
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part = DISKPART(dev);
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switch (fmt) {
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case S_IFCHR:
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sc->sc_disk.dk_copenmask &= ~(1 << part);
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break;
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case S_IFBLK:
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sc->sc_disk.dk_bopenmask &= ~(1 << part);
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break;
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}
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sc->sc_disk.dk_openmask =
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sc->sc_disk.dk_copenmask | sc->sc_disk.dk_bopenmask;
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return 0;
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}
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int
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hpioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
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{
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struct hp_softc *sc = hp_cd.cd_devs[DISKUNIT(dev)];
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struct disklabel *lp = sc->sc_disk.dk_label;
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int error;
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switch (cmd) {
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case DIOCGDINFO:
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bcopy(lp, addr, sizeof (struct disklabel));
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return 0;
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case DIOCGPART:
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((struct partinfo *)addr)->disklab = lp;
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((struct partinfo *)addr)->part =
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&lp->d_partitions[DISKPART(dev)];
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break;
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case DIOCSDINFO:
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if ((flag & FWRITE) == 0)
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return EBADF;
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return setdisklabel(lp, (struct disklabel *)addr, 0, 0);
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case DIOCWDINFO:
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if ((flag & FWRITE) == 0)
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error = EBADF;
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else {
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sc->sc_wlabel = 1;
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error = writedisklabel(dev, hpstrategy, lp, 0);
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sc->sc_wlabel = 0;
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}
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return error;
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case DIOCWLABEL:
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if ((flag & FWRITE) == 0)
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return EBADF;
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sc->sc_wlabel = 1;
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break;
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default:
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return ENOTTY;
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}
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return 0;
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}
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/*
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* Called when a transfer is finished. Check if transfer went OK,
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* Return info about what-to-do-now.
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*/
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enum xfer_action
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hpfinish(struct mba_device *md, int mbasr, int *attn)
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{
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struct hp_softc *sc = md->md_softc;
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struct buf *bp = BUFQ_FIRST(&md->md_q);
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int er1, er2, bc;
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unsigned byte;
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er1 = HP_RCSR(HP_ER1);
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er2 = HP_RCSR(HP_ER2);
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HP_WCSR(HP_ER1, 0);
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HP_WCSR(HP_ER2, 0);
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hper1:
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switch (ffs(er1) - 1) {
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case -1:
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HP_WCSR(HP_ER1, 0);
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goto hper2;
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case HPER1_DCK: /* Corrected? data read. Just notice. */
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bc = bus_space_read_4(md->md_mba->sc_iot,
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md->md_mba->sc_ioh, MBA_BC);
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byte = ~(bc >> 16);
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diskerr(buf, hp_cd.cd_name, "soft ecc", LOG_PRINTF,
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btodb(bp->b_bcount - byte), sc->sc_disk.dk_label);
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er1 &= ~(1<<HPER1_DCK);
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break;
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default:
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printf("drive error :%s er1 %x er2 %x\n",
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sc->sc_dev.dv_xname, er1, er2);
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HP_WCSR(HP_ER1, 0);
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HP_WCSR(HP_ER2, 0);
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goto hper2;
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}
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goto hper1;
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hper2:
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mbasr &= ~(MBASR_DTBUSY|MBASR_DTCMP|MBASR_ATTN);
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if (mbasr)
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printf("massbuss error :%s %x\n",
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sc->sc_dev.dv_xname, mbasr);
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BUFQ_FIRST(&md->md_q)->b_resid = 0;
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disk_unbusy(&sc->sc_disk, BUFQ_FIRST(&md->md_q)->b_bcount);
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return XFER_FINISH;
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}
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/*
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* Non-data transfer interrupt; like volume change.
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*/
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int
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hpattn(struct mba_device *md)
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{
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struct hp_softc *sc = md->md_softc;
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int er1, er2;
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er1 = HP_RCSR(HP_ER1);
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er2 = HP_RCSR(HP_ER2);
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printf("%s: Attention! er1 %x er2 %x\n",
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sc->sc_dev.dv_xname, er1, er2);
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return 0;
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}
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int
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hpsize(dev_t dev)
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{
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int size, unit = DISKUNIT(dev);
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struct hp_softc *sc;
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if (unit >= hp_cd.cd_ndevs || hp_cd.cd_devs[unit] == 0)
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return -1;
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sc = hp_cd.cd_devs[unit];
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size = sc->sc_disk.dk_label->d_partitions[DISKPART(dev)].p_size *
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(sc->sc_disk.dk_label->d_secsize / DEV_BSIZE);
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return size;
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}
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int
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hpdump(dev_t dev, daddr_t blkno, caddr_t va, size_t size)
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{
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return 0;
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}
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int
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hpread(dev_t dev, struct uio *uio, int ioflag)
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{
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return (physio(hpstrategy, NULL, dev, B_READ, minphys, uio));
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}
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int
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hpwrite(dev_t dev, struct uio *uio, int ioflag)
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{
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return (physio(hpstrategy, NULL, dev, B_WRITE, minphys, uio));
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}
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