FreeBSD/Linux Kernel Cross Reference
sys/scsi/uk.c

     /*      $OpenBSD: uk.c,v 1.26 2021/10/24 16:57:30 mpi Exp $     */
     /*      $NetBSD: uk.c,v 1.15 1996/03/17 00:59:57 thorpej Exp $  */
     
     /*
      * Copyright (c) 1994 Charles Hannum.  All rights reserved.
      *
      * 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 Charles Hannum.
     * 4. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
     */
    
    /*
     * Dummy driver for a device we can't identify.
     * Originally by Julian Elischer (julian@tfs.com)
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/errno.h>
    #include <sys/ioctl.h>
    #include <sys/conf.h>
    #include <sys/device.h>
    #include <sys/vnode.h>
    
    #include <scsi/scsi_all.h>
    #include <scsi/scsi_debug.h>
    #include <scsi/scsiconf.h>
    
    #define UKUNIT(z)       (minor(z))
    
    struct uk_softc {
            struct device           sc_dev;
            struct scsi_link        *sc_link; /* all the inter level info */
    };
    
    int     ukmatch(struct device *, void *, void *);
    void    ukattach(struct device *, struct device *, void *);
    int     ukdetach(struct device *, int);
    
    const struct cfattach uk_ca = {
            sizeof(struct uk_softc), ukmatch, ukattach, ukdetach
    };
    
    struct cfdriver uk_cd = {
            NULL, "uk", DV_DULL
    };
    
    #define uklookup(unit) (struct uk_softc *)device_lookup(&uk_cd, (unit))
    
    int
    ukmatch(struct device *parent, void *match, void *aux)
    {
            return 1;
    }
    
    /*
     * The routine called by the low level scsi routine when it discovers
     * a device suitable for this driver.
     */
    void
    ukattach(struct device *parent, struct device *self, void *aux)
    {
            struct uk_softc                 *sc = (void *)self;
            struct scsi_attach_args         *sa = aux;
            struct scsi_link                *link = sa->sa_sc_link;
    
            SC_DEBUG(link, SDEV_DB2, ("ukattach: "));
    
            /* Store information needed to contact our base driver. */
            sc->sc_link = link;
            link->device_softc = sc;
            link->openings = 1;
    
            printf("\n");
    }
    
    int
    ukdetach(struct device *self, int flags)
   {
           int                             bmaj, cmaj, mn;
   
           mn = self->dv_unit;
   
           for (bmaj = 0; bmaj < nblkdev; bmaj++)
                   if (bdevsw[bmaj].d_open == ukopen)
                           vdevgone(bmaj, mn, mn, VBLK);
           for (cmaj = 0; cmaj < nchrdev; cmaj++)
                   if (cdevsw[cmaj].d_open == ukopen)
                           vdevgone(cmaj, mn, mn, VCHR);
   
           return 0;
   }
   
   /*
    * Open the device.
    */
   int
   ukopen(dev_t dev, int flag, int fmt, struct proc *p)
   {
           struct uk_softc                 *sc;
           struct scsi_link                *link;
           int                              unit;
   
           unit = UKUNIT(dev);
           sc = uklookup(unit);
           if (sc == NULL)
                   return ENXIO;
   
           link = sc->sc_link;
   
           SC_DEBUG(link, SDEV_DB1, ("ukopen: dev=0x%x (unit %d (of %d))\n",
               dev, unit, uk_cd.cd_ndevs));
   
           /* Only allow one at a time. */
           if (ISSET(link->flags, SDEV_OPEN)) {
                   device_unref(&sc->sc_dev);
                   return EBUSY;
           }
   
           SET(link->flags, SDEV_OPEN);
   
           SC_DEBUG(link, SDEV_DB3, ("open complete\n"));
   
           device_unref(&sc->sc_dev);
           return 0;
   }
   
   /*
    * Close the device. Called only if we are the LAST
    * occurrence of an open device.
    */
   int
   ukclose(dev_t dev, int flag, int fmt, struct proc *p)
   {
           struct uk_softc                 *sc;
   
           sc = uklookup(UKUNIT(dev));
           if (sc == NULL)
                   return ENXIO;
   
           SC_DEBUG(sc->sc_link, SDEV_DB1, ("closing\n"));
           CLR(sc->sc_link->flags, SDEV_OPEN);
   
           device_unref(&sc->sc_dev);
           return 0;
   }
   
   /*
    * Perform special action on behalf of the user
    * Only does generic scsi ioctls.
    */
   int
   ukioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
   {
           struct uk_softc                 *sc;
           int                              rv;
   
           sc = uklookup(UKUNIT(dev));
           if (sc == NULL)
                   return ENXIO;
   
           rv = scsi_do_ioctl(sc->sc_link, cmd, addr, flag);
   
           device_unref(&sc->sc_dev);
           return rv;
   }

Cache object: 325d33dde654a14bb7d6f5bb015e8c58