sys/dev/raid/amr/amr_disk.c

   1 /*-
   2  * Copyright (c) 1999 Jonathan Lemon
   3  * Copyright (c) 1999, 2000 Michael Smith
   4  * Copyright (c) 2000 BSDi
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28 /*-
  29  * Copyright (c) 2002 Eric Moore
  30  * Copyright (c) 2002 LSI Logic Corporation
  31  * All rights reserved.
  32  *
  33  * Redistribution and use in source and binary forms, with or without
  34  * modification, are permitted provided that the following conditions
  35  * are met:
  36  * 1. Redistributions of source code must retain the above copyright
  37  *    notice, this list of conditions and the following disclaimer.
  38  * 2. Redistributions in binary form must reproduce the above copyright
  39  *    notice, this list of conditions and the following disclaimer in the
  40  *    documentation and/or other materials provided with the distribution.
  41  * 3. The party using or redistributing the source code and binary forms
  42  *    agrees to the disclaimer below and the terms and conditions set forth
  43  *    herein.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  *
  57  * $FreeBSD: src/sys/dev/amr/amr_disk.c,v 1.39 2006/10/31 21:19:25 pjd Exp $
  58  */
  59
  60 /*
  61  * Disk driver for AMI MegaRaid controllers
  62  */
  63
  64 #include <sys/param.h>
  65 #include <sys/systm.h>
  66 #include <sys/kernel.h>
  67 #include <sys/module.h>
  68
  69 #include <sys/bio.h>
  70 #include <sys/bus.h>
  71 #include <sys/conf.h>
  72 #include <sys/dtype.h>
  73
  74 #include <sys/rman.h>
  75
  76 #include <dev/raid/amr/amrio.h>
  77 #include <dev/raid/amr/amrreg.h>
  78 #include <dev/raid/amr/amrvar.h>
  79 #include <dev/raid/amr/amr_tables.h>
  80
  81 /* prototypes */
  82 static int amrd_probe(device_t dev);
  83 static int amrd_attach(device_t dev);
  84 static int amrd_detach(device_t dev);
  85
  86 static  d_open_t        amrd_open;
  87 static  d_strategy_t    amrd_strategy;
  88 static  d_dump_t        amrd_dump;
  89
  90 static struct dev_ops amrd_ops = {
  91         { "amrd", 0, D_DISK },
  92         .d_open = amrd_open,
  93         .d_strategy = amrd_strategy,
  94         .d_dump = amrd_dump,
  95 };
  96
  97 static devclass_t       amrd_devclass;
  98
  99 static device_method_t amrd_methods[] = {
 100     DEVMETHOD(device_probe,     amrd_probe),
 101     DEVMETHOD(device_attach,    amrd_attach),
 102     DEVMETHOD(device_detach,    amrd_detach),
 103     DEVMETHOD_END
 104 };
 105
 106 static driver_t amrd_driver = {
 107     "amrd",
 108     amrd_methods,
 109     sizeof(struct amrd_softc)
 110 };
 111
 112 DRIVER_MODULE_ORDERED(amrd, amr, amrd_driver, &amrd_devclass, NULL, NULL,
 113     SI_ORDER_THIRD);
 114
 115 static int
 116 amrd_open(struct dev_open_args *ap)
 117 {
 118     struct amrd_softc   *sc = ap->a_head.a_dev->si_drv1;
 119
 120     debug_called(1);
 121
 122     if (sc == NULL)
 123         return (ENXIO);
 124
 125     /* controller not active? */
 126     if (sc->amrd_controller->amr_state & AMR_STATE_SHUTDOWN)
 127         return(ENXIO);
 128
 129     return (0);
 130 }
 131 /********************************************************************************
 132  * System crashdump support
 133  */
 134
 135 static int
 136 amrd_dump(struct dev_dump_args *ap)
 137 {
 138     cdev_t dev = ap->a_head.a_dev;
 139     off_t offset = ap->a_offset;
 140     void *virtual = ap->a_virtual;
 141     size_t length = ap->a_length;
 142     struct amrd_softc   *amrd_sc;
 143     struct amr_softc    *amr_sc;
 144     int                 error = 0;
 145
 146     amrd_sc = (struct amrd_softc *)dev->si_drv1;
 147     if (amrd_sc == NULL)
 148         return(ENXIO);
 149     amr_sc  = (struct amr_softc *)amrd_sc->amrd_controller;
 150
 151     if (length > 0) {
 152         int     driveno = amrd_sc->amrd_drive - amr_sc->amr_drive;
 153
 154         error = amr_dump_blocks(amr_sc, driveno, offset / AMR_BLKSIZE,
 155             virtual, (int)length / AMR_BLKSIZE);
 156     }
 157     return(error);
 158 }
 159
 160 /*
 161  * Read/write routine for a buffer.  Finds the proper unit, range checks
 162  * arguments, and schedules the transfer.  Does not wait for the transfer
 163  * to complete.  Multi-page transfers are supported.  All I/O requests must
 164  * be a multiple of a sector in length.
 165  */
 166 static int
 167 amrd_strategy(struct dev_strategy_args *ap)
 168 {
 169     cdev_t dev = ap->a_head.a_dev;
 170     struct bio *bio = ap->a_bio;
 171     struct buf *bp = bio->bio_buf;
 172     struct amrd_softc *sc = (struct amrd_softc *)dev->si_drv1;
 173
 174     /* bogus disk? */
 175     if (sc == NULL) {
 176         bp->b_error = EINVAL;
 177         goto bad;
 178     }
 179     bio->bio_driver_info = sc;
 180
 181     devstat_start_transaction(&sc->amrd_stats);
 182     amr_submit_bio(sc->amrd_controller, bio);
 183     return (0);
 184
 185  bad:
 186     bp->b_flags |= B_ERROR;
 187
 188     /*
 189      * Correctly set the buf to indicate a completed transfer
 190      */
 191     bp->b_resid = bp->b_bcount;
 192     biodone(bio);
 193     return (0);
 194 }
 195
 196 void
 197 amrd_intr(void *data)
 198 {
 199     struct bio *bio = (struct bio *)data;
 200     struct buf *bp = bio->bio_buf;
 201     struct amrd_softc *sc = (struct amrd_softc *)bio->bio_driver_info;
 202
 203     debug_called(2);
 204
 205     devstat_end_transaction_buf(&sc->amrd_stats, bp);
 206     if (bp->b_flags & B_ERROR) {
 207         bp->b_error = EIO;
 208         debug(1, "i/o error\n");
 209     } else {
 210         bp->b_resid = 0;
 211     }
 212
 213     biodone(bio);
 214 }
 215
 216 static int
 217 amrd_probe(device_t dev)
 218 {
 219
 220     debug_called(1);
 221
 222     device_set_desc(dev, "LSILogic MegaRAID logical drive");
 223     return (0);
 224 }
 225
 226 static int
 227 amrd_attach(device_t dev)
 228 {
 229     struct amrd_softc   *sc = (struct amrd_softc *)device_get_softc(dev);
 230     device_t            parent;
 231     struct disk_info info;
 232
 233     debug_called(1);
 234
 235     parent = device_get_parent(dev);
 236     sc->amrd_controller = (struct amr_softc *)device_get_softc(parent);
 237     sc->amrd_unit = device_get_unit(dev);
 238     sc->amrd_drive = device_get_ivars(dev);
 239     sc->amrd_dev = dev;
 240
 241     device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n",
 242                   sc->amrd_drive->al_size / ((1024 * 1024) / AMR_BLKSIZE),
 243                   sc->amrd_drive->al_size, sc->amrd_drive->al_properties & AMR_DRV_RAID_MASK,
 244                   amr_describe_code(amr_table_drvstate, AMR_DRV_CURSTATE(sc->amrd_drive->al_state)));
 245
 246     devstat_add_entry(&sc->amrd_stats, "amrd", sc->amrd_unit, AMR_BLKSIZE,
 247                       DEVSTAT_NO_ORDERED_TAGS,
 248                       DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER,
 249                       DEVSTAT_PRIORITY_ARRAY);
 250
 251     sc->amrd_dev_t = disk_create(sc->amrd_unit, &sc->amrd_disk, &amrd_ops);
 252     sc->amrd_dev_t->si_drv1 = sc;
 253
 254     /* set maximum I/O size to match the maximum s/g size */
 255     sc->amrd_dev_t->si_iosize_max = (AMR_NSEG - 1) * PAGE_SIZE;
 256
 257     /*
 258      * Set disk info, as it appears that all needed data is available already.
 259      * Setting the disk info will also cause the probing to start.
 260      */
 261     bzero(&info, sizeof(info));
 262     info.d_media_blksize = AMR_BLKSIZE;                 /* optional */
 263     info.d_media_blocks = sc->amrd_drive->al_size;
 264
 265     info.d_type = DTYPE_SCSI;                           /* mandatory */
 266     info.d_secpertrack = sc->amrd_drive->al_sectors;
 267     info.d_nheads = sc->amrd_drive->al_heads;
 268     info.d_ncylinders = sc->amrd_drive->al_cylinders;
 269     info.d_secpercyl = sc->amrd_drive->al_sectors * sc->amrd_drive->al_heads;
 270
 271     disk_setdiskinfo(&sc->amrd_disk, &info);
 272
 273     return (0);
 274 }
 275
 276 static int
 277 amrd_detach(device_t dev)
 278 {
 279     struct amrd_softc *sc = (struct amrd_softc *)device_get_softc(dev);
 280
 281     debug_called(1);
 282
 283 #if 0 /* XXX swildner */
 284     if (sc->amrd_disk->d_flags & DISKFLAG_OPEN)
 285         return(EBUSY);
 286 #endif
 287
 288     devstat_remove_entry(&sc->amrd_stats);
 289     disk_destroy(&sc->amrd_disk);
 290
 291     return(0);
 292 }
 293