FreeBSD/Linux Kernel Cross Reference
sys/dev/ips/ips_disk.c

     /*-
      * Written by: David Jeffery
      * Copyright (c) 2002 Adaptec Inc.
      * 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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/5.3/sys/dev/ips/ips_disk.c 126364 2004-02-28 19:14:41Z scottl $");
    
    #include <dev/ips/ips.h>
    #include <dev/ips/ips_disk.h>
    #include <sys/stat.h>
    
    static int ipsd_probe(device_t dev);
    static int ipsd_attach(device_t dev);
    static int ipsd_detach(device_t dev);
    
    static disk_open_t ipsd_open;
    static disk_close_t ipsd_close;
    static disk_strategy_t ipsd_strategy;
    
    static device_method_t ipsd_methods[] = {
            DEVMETHOD(device_probe,         ipsd_probe),
            DEVMETHOD(device_attach,        ipsd_attach),
            DEVMETHOD(device_detach,        ipsd_detach),
            { 0, 0 }
    };
    
    
    static driver_t ipsd_driver = {
            "ipsd",
            ipsd_methods,
            sizeof(ipsdisk_softc_t)
    };
    
    static devclass_t ipsd_devclass;
    DRIVER_MODULE(ipsd, ips, ipsd_driver, ipsd_devclass, 0, 0);
    
    /* handle opening of disk device.  It must set up all
       information about the geometry and size of the disk */
    static int ipsd_open(struct disk *dp)
    {
            ipsdisk_softc_t *dsc = dp->d_drv1;
    
            dsc->state |= IPS_DEV_OPEN;
            DEVICE_PRINTF(2, dsc->dev, "I'm open\n");
            return 0;
    }
    
    static int ipsd_close(struct disk *dp)
    {
            ipsdisk_softc_t *dsc = dp->d_drv1;
            dsc->state &= ~IPS_DEV_OPEN;
            DEVICE_PRINTF(2, dsc->dev, "I'm closed for the day\n");
            return 0;
    }
    
    /* ipsd_finish is called to clean up and return a completed IO request */
    void ipsd_finish(struct bio *iobuf)
    {
            ipsdisk_softc_t *dsc;
            dsc = iobuf->bio_disk->d_drv1;  
    
            if (iobuf->bio_flags & BIO_ERROR) {
                    ipsdisk_softc_t *dsc;
                    dsc = iobuf->bio_disk->d_drv1; 
                    device_printf(dsc->dev, "iobuf error %d\n", iobuf->bio_error);
            } else
                    iobuf->bio_resid = 0;
    
            biodone(iobuf); 
            ips_start_io_request(dsc->sc);
    }
    
    
    static void ipsd_strategy(struct bio *iobuf)
    {
            ipsdisk_softc_t *dsc;
   
           dsc = iobuf->bio_disk->d_drv1;  
           DEVICE_PRINTF(8,dsc->dev,"in strategy\n");
           iobuf->bio_driver1 = (void *)(uintptr_t)dsc->sc->drives[dsc->disk_number].drivenum;
           mtx_lock(&dsc->sc->queue_mtx);
           bioq_disksort(&dsc->sc->queue, iobuf);
           mtx_unlock(&dsc->sc->queue_mtx);
           ips_start_io_request(dsc->sc);
   }
   
   static int ipsd_probe(device_t dev)
   {
           DEVICE_PRINTF(2,dev, "in probe\n");
           device_set_desc(dev, "Logical Drive");
           return 0;
   }
   
   static int ipsd_attach(device_t dev)
   {
           device_t adapter;
           ipsdisk_softc_t *dsc;
           u_int totalsectors;
   
           DEVICE_PRINTF(2,dev, "in attach\n");
   
           dsc = (ipsdisk_softc_t *)device_get_softc(dev);
           bzero(dsc, sizeof(ipsdisk_softc_t));
           adapter = device_get_parent(dev);
           dsc->dev = dev;
           dsc->sc = device_get_softc(adapter);
           dsc->unit = device_get_unit(dev);
           dsc->disk_number = (uintptr_t) device_get_ivars(dev);
           dsc->ipsd_disk = disk_alloc();
           dsc->ipsd_disk->d_drv1 = dsc;
           dsc->ipsd_disk->d_name = "ipsd";
           dsc->ipsd_disk->d_maxsize = IPS_MAX_IO_SIZE;
           dsc->ipsd_disk->d_open = ipsd_open;
           dsc->ipsd_disk->d_close = ipsd_close;
           dsc->ipsd_disk->d_strategy = ipsd_strategy;
   
           totalsectors = dsc->sc->drives[dsc->disk_number].sector_count;
           if ((totalsectors > 0x400000) &&
                           ((dsc->sc->adapter_info.miscflags & 0x8) == 0)) {
                   dsc->ipsd_disk->d_fwheads = IPS_NORM_HEADS;
                   dsc->ipsd_disk->d_fwsectors = IPS_NORM_SECTORS;
           } else {
                   dsc->ipsd_disk->d_fwheads = IPS_COMP_HEADS;
                   dsc->ipsd_disk->d_fwsectors = IPS_COMP_SECTORS;
           }
           dsc->ipsd_disk->d_sectorsize = IPS_BLKSIZE;
           dsc->ipsd_disk->d_mediasize = (off_t)totalsectors * IPS_BLKSIZE;
           dsc->ipsd_disk->d_unit = dsc->unit;
           dsc->ipsd_disk->d_flags = DISKFLAG_NEEDSGIANT;
           disk_create(dsc->ipsd_disk, DISK_VERSION);
   
           device_printf(dev, "Logical Drive  (%dMB)\n",
                         dsc->sc->drives[dsc->disk_number].sector_count >> 11);
           return 0;
   }
   
   static int ipsd_detach(device_t dev)
   {
           ipsdisk_softc_t *dsc;
   
           DEVICE_PRINTF(2, dev,"in detach\n");
           dsc = (ipsdisk_softc_t *)device_get_softc(dev);
           if(dsc->state & IPS_DEV_OPEN)
                   return (EBUSY);
           disk_destroy(dsc->ipsd_disk);
           return 0;
   }

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