188 lines
4.7 KiB
C
188 lines
4.7 KiB
C
/* $OpenBSD: uk.c,v 1.26 2021/10/24 16:57:30 mpi Exp $ */
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/* $NetBSD: uk.c,v 1.15 1996/03/17 00:59:57 thorpej Exp $ */
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/*
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* Copyright (c) 1994 Charles Hannum. 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 by Charles Hannum.
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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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* Dummy driver for a device we can't identify.
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* Originally by Julian Elischer (julian@tfs.com)
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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/errno.h>
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#include <sys/ioctl.h>
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#include <sys/conf.h>
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#include <sys/device.h>
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#include <sys/vnode.h>
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#include <scsi/scsi_all.h>
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#include <scsi/scsi_debug.h>
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#include <scsi/scsiconf.h>
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#define UKUNIT(z) (minor(z))
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struct uk_softc {
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struct device sc_dev;
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struct scsi_link *sc_link; /* all the inter level info */
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};
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int ukmatch(struct device *, void *, void *);
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void ukattach(struct device *, struct device *, void *);
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int ukdetach(struct device *, int);
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const struct cfattach uk_ca = {
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sizeof(struct uk_softc), ukmatch, ukattach, ukdetach
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};
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struct cfdriver uk_cd = {
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NULL, "uk", DV_DULL
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};
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#define uklookup(unit) (struct uk_softc *)device_lookup(&uk_cd, (unit))
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int
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ukmatch(struct device *parent, void *match, void *aux)
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{
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return 1;
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}
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/*
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* The routine called by the low level scsi routine when it discovers
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* a device suitable for this driver.
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*/
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void
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ukattach(struct device *parent, struct device *self, void *aux)
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{
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struct uk_softc *sc = (void *)self;
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struct scsi_attach_args *sa = aux;
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struct scsi_link *link = sa->sa_sc_link;
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SC_DEBUG(link, SDEV_DB2, ("ukattach: "));
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/* Store information needed to contact our base driver. */
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sc->sc_link = link;
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link->device_softc = sc;
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link->openings = 1;
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printf("\n");
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}
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int
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ukdetach(struct device *self, int flags)
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{
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int bmaj, cmaj, mn;
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mn = self->dv_unit;
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for (bmaj = 0; bmaj < nblkdev; bmaj++)
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if (bdevsw[bmaj].d_open == ukopen)
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vdevgone(bmaj, mn, mn, VBLK);
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for (cmaj = 0; cmaj < nchrdev; cmaj++)
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if (cdevsw[cmaj].d_open == ukopen)
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vdevgone(cmaj, mn, mn, VCHR);
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return 0;
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}
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/*
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* Open the device.
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*/
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int
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ukopen(dev_t dev, int flag, int fmt, struct proc *p)
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{
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struct uk_softc *sc;
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struct scsi_link *link;
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int unit;
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unit = UKUNIT(dev);
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sc = uklookup(unit);
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if (sc == NULL)
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return ENXIO;
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link = sc->sc_link;
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SC_DEBUG(link, SDEV_DB1, ("ukopen: dev=0x%x (unit %d (of %d))\n",
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dev, unit, uk_cd.cd_ndevs));
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/* Only allow one at a time. */
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if (ISSET(link->flags, SDEV_OPEN)) {
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device_unref(&sc->sc_dev);
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return EBUSY;
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}
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SET(link->flags, SDEV_OPEN);
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SC_DEBUG(link, SDEV_DB3, ("open complete\n"));
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device_unref(&sc->sc_dev);
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return 0;
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}
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/*
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* Close the device. Called only if we are the LAST
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* occurrence of an open device.
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*/
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int
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ukclose(dev_t dev, int flag, int fmt, struct proc *p)
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{
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struct uk_softc *sc;
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sc = uklookup(UKUNIT(dev));
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if (sc == NULL)
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return ENXIO;
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SC_DEBUG(sc->sc_link, SDEV_DB1, ("closing\n"));
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CLR(sc->sc_link->flags, SDEV_OPEN);
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device_unref(&sc->sc_dev);
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return 0;
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}
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/*
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* Perform special action on behalf of the user
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* Only does generic scsi ioctls.
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*/
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int
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ukioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
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{
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struct uk_softc *sc;
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int rv;
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sc = uklookup(UKUNIT(dev));
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if (sc == NULL)
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return ENXIO;
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rv = scsi_do_ioctl(sc->sc_link, cmd, addr, flag);
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device_unref(&sc->sc_dev);
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return rv;
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}
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