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 1.5 2004/10/06 02:12:31 y0netan1 Exp $
  29  */
  30
  31 #include <sys/devicestat.h>
  32 #include <dev/raid/ips/ips.h>
  33 #include <dev/raid/ips/ips_disk.h>
  34 #include <sys/stat.h>
  35
  36 static int ipsd_probe(device_t dev);
  37 static int ipsd_attach(device_t dev);
  38 static int ipsd_detach(device_t dev);
  39
  40 static disk_open_t ipsd_open;
  41 static disk_close_t ipsd_close;
  42 static disk_strategy_t ipsd_strategy;
  43
  44 static struct cdevsw ipsd_cdevsw = {
  45         .d_name         = "ipsd",
  46         .d_maj          = IPSD_CDEV_MAJOR,
  47         .d_flags        = D_DISK,
  48         .d_port         = NULL,
  49         .d_clone        = NULL,
  50         .old_open       = ipsd_open,
  51         .old_close      = ipsd_close,
  52         .old_strategy   = ipsd_strategy,
  53         .old_read       = physread,
  54         .old_write      = physwrite,
  55 };
  56
  57 static device_method_t ipsd_methods[] = {
  58         DEVMETHOD(device_probe,         ipsd_probe),
  59         DEVMETHOD(device_attach,        ipsd_attach),
  60         DEVMETHOD(device_detach,        ipsd_detach),
  61         { 0, 0 }
  62 };
  63
  64
  65 static driver_t ipsd_driver = {
  66         "ipsd",
  67         ipsd_methods,
  68         sizeof(ipsdisk_softc_t)
  69 };
  70
  71 static devclass_t ipsd_devclass;
  72 DRIVER_MODULE(ipsd, ips, ipsd_driver, ipsd_devclass, 0, 0);
  73
  74 /*
  75  * handle opening of disk device.  It must set up all information about
  76  * the geometry and size of the disk
  77  */
  78 static int
  79 ipsd_open(dev_t dev, int oflags, int devtype, d_thread_t *td)
  80 {
  81         ipsdisk_softc_t *dsc = dev->si_drv1;
  82
  83         if (dsc == NULL)
  84                 return (ENXIO);
  85         dsc->state |= IPS_DEV_OPEN;
  86         DEVICE_PRINTF(2, dsc->dev, "I'm open\n");
  87         return 0;
  88 }
  89
  90 static int
  91 ipsd_close(dev_t dev, int oflags, int devtype, d_thread_t *td)
  92 {
  93         ipsdisk_softc_t *dsc = dev->si_drv1;
  94
  95         dsc->state &= ~IPS_DEV_OPEN;
  96         DEVICE_PRINTF(2, dsc->dev, "I'm closed for the day\n");
  97         return 0;
  98 }
  99
 100 /* ipsd_finish is called to clean up and return a completed IO request */
 101 void
 102 ipsd_finish(struct bio *iobuf)
 103 {
 104         ipsdisk_softc_t *dsc;
 105
 106         dsc = iobuf->bio_disk->d_drv1;
 107         if (iobuf->bio_flags & BIO_ERROR) {
 108                 device_printf(dsc->dev, "iobuf error %d\n", iobuf->bio_error);
 109         } else
 110                 iobuf->bio_resid = 0;
 111         devstat_end_transaction_buf(&dsc->stats, iobuf);
 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         devstat_start_transaction(&dsc->stats);
 125         ips_start_io_request(dsc->sc, iobuf);
 126 }
 127
 128 static int
 129 ipsd_probe(device_t dev)
 130 {
 131         DEVICE_PRINTF(2, dev, "in probe\n");
 132         device_set_desc(dev, "Logical Drive");
 133         return 0;
 134 }
 135
 136 static int
 137 ipsd_attach(device_t dev)
 138 {
 139         device_t adapter;
 140         ipsdisk_softc_t *dsc;
 141         struct  disklabel *label;
 142         u_int totalsectors;
 143         u_int nheads, nsectors;
 144
 145         DEVICE_PRINTF(2, dev, "in attach\n");
 146         dsc = (ipsdisk_softc_t *)device_get_softc(dev);
 147         bzero(dsc, sizeof(ipsdisk_softc_t));
 148         adapter = device_get_parent(dev);
 149         dsc->dev = dev;
 150         dsc->sc = device_get_softc(adapter);
 151         dsc->unit = device_get_unit(dev);
 152         dsc->disk_number = (uintptr_t) device_get_ivars(dev);
 153         totalsectors = dsc->sc->drives[dsc->disk_number].sector_count;
 154         if ((totalsectors > 0x400000) &&
 155             ((dsc->sc->adapter_info.miscflags & 0x8) == 0)) {
 156                 nheads = IPS_NORM_HEADS;
 157                 nsectors = IPS_NORM_SECTORS;
 158         } else {
 159                 nheads = IPS_COMP_HEADS;
 160                 nsectors = IPS_COMP_SECTORS;
 161         }
 162         devstat_add_entry(&dsc->stats, "ipsd", dsc->unit, DEV_BSIZE,
 163                           DEVSTAT_NO_ORDERED_TAGS,
 164                           DEVSTAT_TYPE_DIRECT | DEVSTAT_TYPE_IF_SCSI,
 165                           DEVSTAT_PRIORITY_DISK);
 166         dsc->ipsd_dev_t = disk_create(dsc->unit, &dsc->ipsd_disk, 0,
 167             &ipsd_cdevsw);
 168         dsc->ipsd_dev_t->si_drv1 = dsc;
 169         dsc->ipsd_dev_t->si_iosize_max = IPS_MAX_IO_SIZE;
 170         label = &dsc->ipsd_disk.d_label;
 171         bzero(label, sizeof(*label));
 172         label->d_ntracks    = nheads;
 173         label->d_nsectors   = nsectors;
 174         label->d_type       = DTYPE_ESDI;
 175         label->d_secsize    = IPS_BLKSIZE;
 176         label->d_ncylinders = totalsectors / nheads / nsectors;
 177         label->d_secpercyl  = nsectors / nheads;
 178         label->d_secperunit = totalsectors;
 179         device_printf(dev, "Logical Drive  (%dMB)\n",
 180             dsc->sc->drives[dsc->disk_number].sector_count >> 11);
 181         return 0;
 182 }
 183
 184 static int
 185 ipsd_detach(device_t dev)
 186 {
 187         ipsdisk_softc_t *dsc;
 188
 189         DEVICE_PRINTF(2, dev, "in detach\n");
 190         dsc = (ipsdisk_softc_t *)device_get_softc(dev);
 191         if (dsc->state & IPS_DEV_OPEN)
 192                 return (EBUSY);
 193         devstat_remove_entry(&dsc->stats);
 194         disk_destroy(&dsc->ipsd_disk);
 195         return 0;
 196 }
 197