187 lines
4.9 KiB
C
187 lines
4.9 KiB
C
/* $NetBSD: uk.c,v 1.60 2012/02/08 12:22:00 mbalmer Exp $ */
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Charles M. Hannum.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* 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/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: uk.c,v 1.60 2012/02/08 12:22:00 mbalmer Exp $");
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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/device.h>
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#include <sys/conf.h>
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#include <sys/vnode.h>
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#include <dev/scsipi/scsi_all.h>
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#include <dev/scsipi/scsipi_all.h>
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#include <dev/scsipi/scsiconf.h>
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struct uk_softc {
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device_t sc_dev;
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struct scsipi_periph *sc_periph; /* all the inter level info */
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};
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static int ukmatch(device_t, cfdata_t, void *);
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static void ukattach(device_t, device_t, void *);
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static int ukdetach(device_t, int);
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CFATTACH_DECL_NEW(
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uk,
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sizeof(struct uk_softc),
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ukmatch,
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ukattach,
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ukdetach,
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NULL
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);
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extern struct cfdriver uk_cd;
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static dev_type_open(ukopen);
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static dev_type_close(ukclose);
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static dev_type_ioctl(ukioctl);
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const struct cdevsw uk_cdevsw = {
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ukopen, ukclose, noread, nowrite, ukioctl,
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nostop, notty, nopoll, nommap, nokqfilter, D_OTHER,
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};
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static int
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ukmatch(device_t parent, cfdata_t 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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static void
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ukattach(device_t parent, device_t self, void *aux)
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{
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struct uk_softc *uk = device_private(self);
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struct scsipibus_attach_args *sa = aux;
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struct scsipi_periph *periph = sa->sa_periph;
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SC_DEBUG(periph, SCSIPI_DB2, ("ukattach: "));
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uk->sc_dev = self;
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/* Store information needed to contact our base driver */
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uk->sc_periph = periph;
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periph->periph_dev = uk->sc_dev;
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printf("\n");
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}
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static int
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ukdetach(device_t self, int flags)
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{
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int cmaj, mn;
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/* locate the major number */
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cmaj = cdevsw_lookup_major(&uk_cdevsw);
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/* Nuke the vnodes for any open instances */
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mn = device_unit(self);
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vdevgone(cmaj, mn, mn, VCHR);
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return 0;
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}
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static int
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ukopen(dev_t dev, int flag, int fmt, struct lwp *l)
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{
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int unit, error;
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struct uk_softc *uk;
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struct scsipi_periph *periph;
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struct scsipi_adapter *adapt;
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unit = minor(dev);
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uk = device_lookup_private(&uk_cd, unit);
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if (uk == NULL)
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return ENXIO;
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periph = uk->sc_periph;
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adapt = periph->periph_channel->chan_adapter;
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SC_DEBUG(periph, SCSIPI_DB1,
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("ukopen: dev=0x%"PRIx64" (unit %d (of %d))\n", dev, unit,
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uk_cd.cd_ndevs));
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/* Only allow one at a time */
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if (periph->periph_flags & PERIPH_OPEN) {
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aprint_error_dev(uk->sc_dev, "already open\n");
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return EBUSY;
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}
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if ((error = scsipi_adapter_addref(adapt)) != 0)
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return error;
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periph->periph_flags |= PERIPH_OPEN;
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SC_DEBUG(periph, SCSIPI_DB3, ("open complete\n"));
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return 0;
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}
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static int
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ukclose(dev_t dev, int flag, int fmt, struct lwp *l)
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{
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struct uk_softc *uk = device_lookup_private(&uk_cd, minor(dev));
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struct scsipi_periph *periph = uk->sc_periph;
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struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter;
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SC_DEBUG(uk->sc_periph, SCSIPI_DB1, ("closing\n"));
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scsipi_wait_drain(periph);
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scsipi_adapter_delref(adapt);
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periph->periph_flags &= ~PERIPH_OPEN;
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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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static int
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ukioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l)
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{
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struct uk_softc *uk = device_lookup_private(&uk_cd, minor(dev));
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return scsipi_do_ioctl(uk->sc_periph, dev, cmd, addr, flag, l);
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}
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