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 Exp $
  28  * $DragonFly: src/sys/dev/raid/ips/ips_disk.c,v 1.4 2004/09/06 16:30:10 joerg Exp $
  29  */
  30
  31 #include <dev/raid/ips/ips.h>
  32 #include <dev/raid/ips/ips_disk.h>
  33 #include <sys/stat.h>
  34
  35 static int ipsd_probe(device_t dev);
  36 static int ipsd_attach(device_t dev);
  37 static int ipsd_detach(device_t dev);
  38
  39 static disk_open_t ipsd_open;
  40 static disk_close_t ipsd_close;
  41 static disk_strategy_t ipsd_strategy;
  42
  43 static struct cdevsw ipsd_cdevsw = {
  44         .d_name         = "ipsd",
  45         .d_maj          = IPSD_CDEV_MAJOR,
  46         .d_flags        = D_DISK,
  47         .d_port         = NULL,
  48         .d_clone        = NULL,
  49         .old_open       = ipsd_open,
  50         .old_close      = ipsd_close,
  51         .old_strategy   = ipsd_strategy,
  52         .old_read       = physread,
  53         .old_write      = physwrite,
  54 };
  55
  56 static device_method_t ipsd_methods[] = {
  57         DEVMETHOD(device_probe,         ipsd_probe),
  58         DEVMETHOD(device_attach,        ipsd_attach),
  59         DEVMETHOD(device_detach,        ipsd_detach),
  60         { 0, 0 }
  61 };
  62
  63
  64 static driver_t ipsd_driver = {
  65         "ipsd",
  66         ipsd_methods,
  67         sizeof(ipsdisk_softc_t)
  68 };
  69
  70 static devclass_t ipsd_devclass;
  71 DRIVER_MODULE(ipsd, ips, ipsd_driver, ipsd_devclass, 0, 0);
  72
  73 /*
  74  * handle opening of disk device.  It must set up all information about
  75  * the geometry and size of the disk
  76  */
  77 static int
  78 ipsd_open(dev_t dev, int oflags, int devtype, d_thread_t *td)
  79 {
  80         ipsdisk_softc_t *dsc = dev->si_drv1;
  81
  82         if (dsc == NULL)
  83                 return (ENXIO);
  84         dsc->state |= IPS_DEV_OPEN;
  85         DEVICE_PRINTF(2, dsc->dev, "I'm open\n");
  86         return 0;
  87 }
  88
  89 static int
  90 ipsd_close(dev_t dev, int oflags, int devtype, d_thread_t *td)
  91 {
  92         ipsdisk_softc_t *dsc = dev->si_drv1;
  93
  94         dsc->state &= ~IPS_DEV_OPEN;
  95         DEVICE_PRINTF(2, dsc->dev, "I'm closed for the day\n");
  96         return 0;
  97 }
  98
  99 /* ipsd_finish is called to clean up and return a completed IO request */
 100 void
 101 ipsd_finish(struct bio *iobuf)
 102 {
 103         if (iobuf->bio_flags & BIO_ERROR) {
 104                 ipsdisk_softc_t *dsc;
 105                 dsc = iobuf->bio_disk->d_drv1;
 106                 device_printf(dsc->dev, "iobuf error %d\n", iobuf->bio_error);
 107         } else
 108                 iobuf->bio_resid = 0;
 109
 110         biodone(iobuf);
 111 }
 112
 113
 114 static void
 115 ipsd_strategy(struct bio *iobuf)
 116 {
 117         ipsdisk_softc_t *dsc;
 118
 119         dsc = iobuf->bio_disk->d_drv1;
 120         DEVICE_PRINTF(8, dsc->dev, "in strategy\n");
 121         iobuf->bio_driver1 = (void *)(uintptr_t)dsc->sc->drives[dsc->disk_number].drivenum;
 122         ips_start_io_request(dsc->sc, iobuf);
 123 }
 124
 125 static int
 126 ipsd_probe(device_t dev)
 127 {
 128         DEVICE_PRINTF(2, dev, "in probe\n");
 129         device_set_desc(dev, "Logical Drive");
 130         return 0;
 131 }
 132
 133 static int
 134 ipsd_attach(device_t dev)
 135 {
 136         device_t adapter;
 137         ipsdisk_softc_t *dsc;
 138         struct  disklabel *label;
 139         u_int totalsectors;
 140         u_int nheads, nsectors;
 141
 142         DEVICE_PRINTF(2, dev, "in attach\n");
 143         dsc = (ipsdisk_softc_t *)device_get_softc(dev);
 144         bzero(dsc, sizeof(ipsdisk_softc_t));
 145         adapter = device_get_parent(dev);
 146         dsc->dev = dev;
 147         dsc->sc = device_get_softc(adapter);
 148         dsc->unit = device_get_unit(dev);
 149         dsc->disk_number = (uintptr_t) device_get_ivars(dev);
 150         totalsectors = dsc->sc->drives[dsc->disk_number].sector_count;
 151         if ((totalsectors > 0x400000) &&
 152             ((dsc->sc->adapter_info.miscflags & 0x8) == 0)) {
 153                 nheads = IPS_NORM_HEADS;
 154                 nsectors = IPS_NORM_SECTORS;
 155         } else {
 156                 nheads = IPS_COMP_HEADS;
 157                 nsectors = IPS_COMP_SECTORS;
 158         }
 159         dsc->ipsd_dev_t = disk_create(dsc->unit, &dsc->ipsd_disk, 0,
 160             &ipsd_cdevsw);
 161         dsc->ipsd_dev_t->si_drv1 = dsc;
 162         dsc->ipsd_dev_t->si_iosize_max = IPS_MAX_IO_SIZE;
 163         label = &dsc->ipsd_disk.d_label;
 164         bzero(label, sizeof(*label));
 165         label->d_ntracks    = nheads;
 166         label->d_nsectors   = nsectors;
 167         label->d_type       = DTYPE_ESDI;
 168         label->d_secsize    = IPS_BLKSIZE;
 169         label->d_ncylinders = totalsectors / nheads / nsectors;
 170         label->d_secpercyl  = nsectors / nheads;
 171         label->d_secperunit = totalsectors;
 172         device_printf(dev, "Logical Drive  (%dMB)\n",
 173             dsc->sc->drives[dsc->disk_number].sector_count >> 11);
 174         return 0;
 175 }
 176
 177 static int
 178 ipsd_detach(device_t dev)
 179 {
 180         ipsdisk_softc_t *dsc;
 181
 182         DEVICE_PRINTF(2, dev, "in detach\n");
 183         dsc = (ipsdisk_softc_t *)device_get_softc(dev);
 184         if (dsc->state & IPS_DEV_OPEN)
 185                 return (EBUSY);
 186         disk_destroy(&dsc->ipsd_disk);
 187         return 0;
 188 }
 189