sys/dev/raid/ips/ips_disk.c

   1 /*-
   2  * Written by: David Jeffery
   3  * Copyright (c) 2002 Adaptec Inc.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  *
  27  * $FreeBSD: src/sys/dev/ips/ips_disk.c,v 1.4 2003/09/22 04:59:07 njl
  28  * $DragonFly: src/sys/dev/raid/ips/ips_disk.c,v 1.1 2004/01/15 15:41:23 drhodus Exp $
  29  */
  30
  31 #include <sys/cdefs.h>
  32
  33 #include <dev/raid/ips/ips.h>
  34 #include <dev/raid/ips/ips_disk.h>
  35 #include <sys/stat.h>
  36
  37 static int ipsd_probe(device_t dev);
  38 static int ipsd_attach(device_t dev);
  39 static int ipsd_detach(device_t dev);
  40
  41 static disk_open_t ipsd_open;
  42 static disk_close_t ipsd_close;
  43 static disk_strategy_t ipsd_strategy;
  44
  45 static struct cdevsw ipsd_cdevsw = {
  46         .d_name         = "ipsd",
  47         .d_maj          = IPSD_CDEV_MAJOR,
  48         .d_flags        = D_DISK,
  49         .d_port         = NULL,
  50         .d_autoq        = 0,
  51         .old_open       = ipsd_open,
  52         .old_close      = ipsd_close,
  53         .old_strategy   = ipsd_strategy,
  54         .old_read       = physread,
  55         .old_write      = physwrite,
  56 };
  57
  58 static device_method_t ipsd_methods[] = {
  59         DEVMETHOD(device_probe,         ipsd_probe),
  60         DEVMETHOD(device_attach,        ipsd_attach),
  61         DEVMETHOD(device_detach,        ipsd_detach),
  62         { 0, 0 }
  63 };
  64
  65
  66 static driver_t ipsd_driver = {
  67         "ipsd",
  68         ipsd_methods,
  69         sizeof(ipsdisk_softc_t)
  70 };
  71
  72 static devclass_t ipsd_devclass;
  73 DRIVER_MODULE(ipsd, ips, ipsd_driver, ipsd_devclass, 0, 0);
  74
  75 /*
  76  * handle opening of disk device.  It must set up all information about
  77  * the geometry and size of the disk
  78  */
  79 static int
  80 ipsd_open(dev_t dev, int oflags, int devtype, d_thread_t *td)
  81 {
  82         ipsdisk_softc_t *dsc = dev->si_drv1;
  83
  84         if (dsc == NULL)
  85                 return (ENXIO);
  86         dsc->state |= IPS_DEV_OPEN;
  87         DEVICE_PRINTF(2, dsc->dev, "I'm open\n");
  88         return 0;
  89 }
  90
  91 static int
  92 ipsd_close(dev_t dev, int oflags, int devtype, d_thread_t *td)
  93 {
  94         ipsdisk_softc_t *dsc = dev->si_drv1;
  95
  96         dsc->state &= ~IPS_DEV_OPEN;
  97         DEVICE_PRINTF(2, dsc->dev, "I'm closed for the day\n");
  98         return 0;
  99 }
 100
 101 /* ipsd_finish is called to clean up and return a completed IO request */
 102 void
 103 ipsd_finish(struct bio *iobuf)
 104 {
 105         if (iobuf->bio_flags & BIO_ERROR) {
 106                 ipsdisk_softc_t *dsc;
 107                 dsc = iobuf->bio_disk->d_drv1;
 108                 device_printf(dsc->dev, "iobuf error %d\n", iobuf->bio_error);
 109         } else
 110                 iobuf->bio_resid = 0;
 111
 112         biodone(iobuf);
 113 }
 114
 115
 116 static void
 117 ipsd_strategy(struct bio *iobuf)
 118 {
 119         ipsdisk_softc_t *dsc;
 120
 121         dsc = iobuf->bio_disk->d_drv1;
 122         DEVICE_PRINTF(8, dsc->dev, "in strategy\n");
 123         iobuf->bio_driver1 = (void *)(uintptr_t)dsc->sc->drives[dsc->disk_number].drivenum;
 124         ips_start_io_request(dsc->sc, iobuf);
 125 }
 126
 127 static int
 128 ipsd_probe(device_t dev)
 129 {
 130         DEVICE_PRINTF(2, dev, "in probe\n");
 131         device_set_desc(dev, "Logical Drive");
 132         return 0;
 133 }
 134
 135 static int
 136 ipsd_attach(device_t dev)
 137 {
 138         device_t adapter;
 139         ipsdisk_softc_t *dsc;
 140         struct  disklabel *label;
 141         u_int totalsectors;
 142         u_int nheads, nsectors;
 143
 144         DEVICE_PRINTF(2, dev, "in attach\n");
 145         dsc = (ipsdisk_softc_t *)device_get_softc(dev);
 146         bzero(dsc, sizeof(ipsdisk_softc_t));
 147         adapter = device_get_parent(dev);
 148         dsc->dev = dev;
 149         dsc->sc = device_get_softc(adapter);
 150         dsc->unit = device_get_unit(dev);
 151         dsc->disk_number = (uintptr_t) device_get_ivars(dev);
 152         totalsectors = dsc->sc->drives[dsc->disk_number].sector_count;
 153         if ((totalsectors > 0x400000) &&
 154             ((dsc->sc->adapter_info.miscflags & 0x8) == 0)) {
 155                 nheads = IPS_NORM_HEADS;
 156                 nsectors = IPS_NORM_SECTORS;
 157         } else {
 158                 nheads = IPS_COMP_HEADS;
 159                 nsectors = IPS_COMP_SECTORS;
 160         }
 161         dsc->ipsd_dev_t = disk_create(dsc->unit, &dsc->ipsd_disk, 0,
 162             &ipsd_cdevsw);
 163         dsc->ipsd_dev_t->si_drv1 = dsc;
 164         dsc->ipsd_dev_t->si_iosize_max = IPS_MAX_IO_SIZE;
 165         label = &dsc->ipsd_disk.d_label;
 166         bzero(label, sizeof(*label));
 167         label->d_ntracks    = nheads;
 168         label->d_nsectors   = nsectors;
 169         label->d_type       = DTYPE_ESDI;
 170         label->d_secsize    = IPS_BLKSIZE;
 171         label->d_ncylinders = totalsectors / nheads / nsectors;
 172         label->d_secpercyl  = nsectors / nheads;
 173         label->d_secperunit = totalsectors;
 174         device_printf(dev, "Logical Drive  (%dMB)\n",
 175             dsc->sc->drives[dsc->disk_number].sector_count >> 11);
 176         return 0;
 177 }
 178
 179 static int
 180 ipsd_detach(device_t dev)
 181 {
 182         ipsdisk_softc_t *dsc;
 183
 184         DEVICE_PRINTF(2, dev, "in detach\n");
 185         dsc = (ipsdisk_softc_t *)device_get_softc(dev);
 186         if (dsc->state & IPS_DEV_OPEN)
 187                 return (EBUSY);
 188         disk_destroy(&dsc->ipsd_disk);
 189         return 0;
 190 }
 191