The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/amr/amr_disk.c

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    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 
   58 #include <sys/cdefs.h>
   59 __FBSDID("$FreeBSD: releng/6.0/sys/dev/amr/amr_disk.c 140340 2005-01-16 07:34:26Z scottl $");
   60 
   61 /*
   62  * Disk driver for AMI MegaRaid controllers
   63  */
   64 
   65 #include <sys/param.h>
   66 #include <sys/systm.h>
   67 #include <sys/kernel.h>
   68 #include <sys/module.h>
   69 
   70 #include <dev/amr/amr_compat.h>
   71 #include <sys/bus.h>
   72 #include <sys/conf.h>
   73 
   74 #include <machine/bus.h>
   75 #include <sys/rman.h>
   76 
   77 #include <dev/amr/amrio.h>
   78 #include <dev/amr/amrreg.h>
   79 #include <dev/amr/amrvar.h>
   80 #include <dev/amr/amr_tables.h>
   81 
   82 /* prototypes */
   83 static int amrd_probe(device_t dev);
   84 static int amrd_attach(device_t dev);
   85 static int amrd_detach(device_t dev);
   86 
   87 static  disk_open_t     amrd_open;
   88 static  disk_strategy_t amrd_strategy;
   89 
   90 static devclass_t       amrd_devclass;
   91 #ifdef FREEBSD_4
   92 static int              disks_registered = 0;
   93 #endif
   94 
   95 static device_method_t amrd_methods[] = {
   96     DEVMETHOD(device_probe,     amrd_probe),
   97     DEVMETHOD(device_attach,    amrd_attach),
   98     DEVMETHOD(device_detach,    amrd_detach),
   99     { 0, 0 }
  100 };
  101 
  102 static driver_t amrd_driver = {
  103     "amrd",
  104     amrd_methods,
  105     sizeof(struct amrd_softc)
  106 };
  107 
  108 DRIVER_MODULE(amrd, amr, amrd_driver, amrd_devclass, 0, 0);
  109 
  110 static int
  111 amrd_open(struct disk *dp)
  112 {
  113     struct amrd_softc   *sc = (struct amrd_softc *)dp->d_drv1;
  114 #if __FreeBSD_version < 500000          /* old buf style */
  115     struct disklabel    *label;
  116 #endif
  117 
  118     debug_called(1);
  119 
  120     if (sc == NULL)
  121         return (ENXIO);
  122 
  123     /* controller not active? */
  124     if (sc->amrd_controller->amr_state & AMR_STATE_SHUTDOWN)
  125         return(ENXIO);
  126 
  127 #if __FreeBSD_version < 500000          /* old buf style */
  128     label = &sc->amrd_disk.d_label;
  129     bzero(label, sizeof(*label));
  130     label->d_type       = DTYPE_SCSI;
  131     label->d_secsize    = AMR_BLKSIZE;
  132     label->d_nsectors   = sc->amrd_drive->al_sectors;
  133     label->d_ntracks    = sc->amrd_drive->al_heads;
  134     label->d_ncylinders = sc->amrd_drive->al_cylinders;
  135     label->d_secpercyl  = sc->amrd_drive->al_sectors * sc->amrd_drive->al_heads;
  136     label->d_secperunit = sc->amrd_drive->al_size;
  137 #else
  138     sc->amrd_disk->d_sectorsize = AMR_BLKSIZE;
  139     sc->amrd_disk->d_mediasize = (off_t)sc->amrd_drive->al_size * AMR_BLKSIZE;
  140     sc->amrd_disk->d_fwsectors = sc->amrd_drive->al_sectors;
  141     sc->amrd_disk->d_fwheads = sc->amrd_drive->al_heads;
  142 #endif
  143 
  144     return (0);
  145 }
  146 /********************************************************************************
  147  * System crashdump support
  148  */
  149 
  150 static int
  151 amrd_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length)
  152 {
  153 
  154     struct amrd_softc   *amrd_sc;
  155     struct amr_softc    *amr_sc;
  156     int                 error;
  157     struct disk         *dp;
  158 
  159     dp = arg;
  160     amrd_sc = (struct amrd_softc *)dp->d_drv1;
  161     if (amrd_sc == NULL)
  162         return(ENXIO);
  163     amr_sc  = (struct amr_softc *)amrd_sc->amrd_controller;
  164 
  165     if (length > 0) {
  166         int     driveno = amrd_sc->amrd_drive - amr_sc->amr_drive;
  167         if ((error = amr_dump_blocks(amr_sc,driveno,offset / AMR_BLKSIZE ,(void *)virtual,(int) length / AMR_BLKSIZE  )) != 0)
  168                 return(error);
  169 
  170     }
  171     return(0);
  172 }
  173 
  174 /*
  175  * Read/write routine for a buffer.  Finds the proper unit, range checks
  176  * arguments, and schedules the transfer.  Does not wait for the transfer
  177  * to complete.  Multi-page transfers are supported.  All I/O requests must
  178  * be a multiple of a sector in length.
  179  */
  180 static void
  181 amrd_strategy(struct bio *bio)
  182 {
  183     struct amrd_softc   *sc = (struct amrd_softc *)bio->bio_disk->d_drv1;
  184 
  185     /* bogus disk? */
  186     if (sc == NULL) {
  187         bio->bio_error = EINVAL;
  188         goto bad;
  189     }
  190 
  191     amr_submit_bio(sc->amrd_controller, bio);
  192     return;
  193 
  194  bad:
  195     bio->bio_flags |= BIO_ERROR;
  196 
  197     /*
  198      * Correctly set the buf to indicate a completed transfer
  199      */
  200     bio->bio_resid = bio->bio_bcount;
  201     biodone(bio);
  202     return;
  203 }
  204 
  205 void
  206 amrd_intr(void *data)
  207 {
  208     struct bio *bio = (struct bio *)data;
  209 
  210     debug_called(2);
  211 
  212     if (bio->bio_flags & BIO_ERROR) {
  213         bio->bio_error = EIO;
  214         debug(1, "i/o error\n");
  215     } else {
  216         bio->bio_resid = 0;
  217     }
  218 
  219     AMR_BIO_FINISH(bio);
  220 }
  221 
  222 static int
  223 amrd_probe(device_t dev)
  224 {
  225 
  226     debug_called(1);
  227 
  228     device_set_desc(dev, "LSILogic MegaRAID logical drive");
  229     return (0);
  230 }
  231 
  232 static int
  233 amrd_attach(device_t dev)
  234 {
  235     struct amrd_softc   *sc = (struct amrd_softc *)device_get_softc(dev);
  236     device_t            parent;
  237     
  238     debug_called(1);
  239 
  240     parent = device_get_parent(dev);
  241     sc->amrd_controller = (struct amr_softc *)device_get_softc(parent);
  242     sc->amrd_unit = device_get_unit(dev);
  243     sc->amrd_drive = device_get_ivars(dev);
  244     sc->amrd_dev = dev;
  245 
  246     device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n",
  247                   sc->amrd_drive->al_size / ((1024 * 1024) / AMR_BLKSIZE),
  248                   sc->amrd_drive->al_size, sc->amrd_drive->al_properties & AMR_DRV_RAID_MASK, 
  249                   amr_describe_code(amr_table_drvstate, AMR_DRV_CURSTATE(sc->amrd_drive->al_state)));
  250 
  251     sc->amrd_disk = disk_alloc();
  252     sc->amrd_disk->d_drv1 = sc;
  253     sc->amrd_disk->d_maxsize = (AMR_NSEG - 1) * PAGE_SIZE;
  254     sc->amrd_disk->d_open = amrd_open;
  255     sc->amrd_disk->d_strategy = amrd_strategy;
  256     sc->amrd_disk->d_name = "amrd";
  257     sc->amrd_disk->d_dump = (dumper_t *)amrd_dump;
  258     sc->amrd_disk->d_unit = sc->amrd_unit;
  259     sc->amrd_disk->d_flags = 0;
  260     disk_create(sc->amrd_disk, DISK_VERSION);
  261 #ifdef FREEBSD_4
  262     disks_registered++;
  263 #endif
  264 
  265     return (0);
  266 }
  267 
  268 static int
  269 amrd_detach(device_t dev)
  270 {
  271     struct amrd_softc *sc = (struct amrd_softc *)device_get_softc(dev);
  272 
  273     debug_called(1);
  274 
  275     if (sc->amrd_disk->d_flags & DISKFLAG_OPEN)
  276         return(EBUSY);
  277 
  278 #ifdef FREEBSD_4
  279     if (--disks_registered == 0)
  280         cdevsw_remove(&amrddisk_cdevsw);
  281 #else
  282     disk_destroy(sc->amrd_disk);
  283 #endif
  284     return(0);
  285 }
  286 

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