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/mfi/mfi_disk.c

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    1 /*-
    2  * Copyright (c) 2006 IronPort Systems
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD$");
   29 
   30 #include "opt_mfi.h"
   31 
   32 #include <sys/param.h>
   33 #include <sys/systm.h>
   34 #include <sys/kernel.h>
   35 #include <sys/selinfo.h>
   36 #include <sys/module.h>
   37 #include <sys/malloc.h>
   38 #include <sys/uio.h>
   39 
   40 #include <sys/bio.h>
   41 #include <sys/bus.h>
   42 #include <sys/conf.h>
   43 #include <sys/disk.h>
   44 #include <geom/geom_disk.h>
   45 
   46 #include <vm/vm.h>
   47 #include <vm/pmap.h>
   48 
   49 #include <machine/md_var.h>
   50 #include <machine/bus.h>
   51 #include <sys/rman.h>
   52 
   53 #include <dev/mfi/mfireg.h>
   54 #include <dev/mfi/mfi_ioctl.h>
   55 #include <dev/mfi/mfivar.h>
   56 
   57 static int      mfi_disk_probe(device_t dev);
   58 static int      mfi_disk_attach(device_t dev);
   59 static int      mfi_disk_detach(device_t dev);
   60 
   61 static disk_open_t      mfi_disk_open;
   62 static disk_close_t     mfi_disk_close;
   63 static disk_strategy_t  mfi_disk_strategy;
   64 static dumper_t         mfi_disk_dump;
   65 
   66 static devclass_t       mfi_disk_devclass;
   67 
   68 static device_method_t mfi_disk_methods[] = {
   69         DEVMETHOD(device_probe,         mfi_disk_probe),
   70         DEVMETHOD(device_attach,        mfi_disk_attach),
   71         DEVMETHOD(device_detach,        mfi_disk_detach),
   72         { 0, 0 }
   73 };
   74 
   75 static driver_t mfi_disk_driver = {
   76         "mfid",
   77         mfi_disk_methods,
   78         sizeof(struct mfi_disk)
   79 };
   80 
   81 DRIVER_MODULE(mfid, mfi, mfi_disk_driver, mfi_disk_devclass, 0, 0);
   82 
   83 static int
   84 mfi_disk_probe(device_t dev)
   85 {
   86 
   87         return (0);
   88 }
   89 
   90 static int
   91 mfi_disk_attach(device_t dev)
   92 {
   93         struct mfi_disk *sc;
   94         struct mfi_ld_info *ld_info;
   95         uint64_t sectors;
   96         uint32_t secsize;
   97         char *state;
   98 
   99         sc = device_get_softc(dev);
  100         ld_info = device_get_ivars(dev);
  101 
  102         sc->ld_dev = dev;
  103         sc->ld_id = ld_info->ld_config.properties.ld.v.target_id;
  104         sc->ld_unit = device_get_unit(dev);
  105         sc->ld_info = ld_info;
  106         sc->ld_controller = device_get_softc(device_get_parent(dev));
  107         sc->ld_flags = 0;
  108 
  109         sectors = ld_info->size;
  110         secsize = MFI_SECTOR_LEN;
  111         mtx_lock(&sc->ld_controller->mfi_io_lock);
  112         TAILQ_INSERT_TAIL(&sc->ld_controller->mfi_ld_tqh, sc, ld_link);
  113         mtx_unlock(&sc->ld_controller->mfi_io_lock);
  114 
  115         switch (ld_info->ld_config.params.state) {
  116         case MFI_LD_STATE_OFFLINE:
  117                 state = "offline";
  118                 break;
  119         case MFI_LD_STATE_PARTIALLY_DEGRADED:
  120                 state = "partially degraded";
  121                 break;
  122         case MFI_LD_STATE_DEGRADED:
  123                 state = "degraded";
  124                 break;
  125         case MFI_LD_STATE_OPTIMAL:
  126                 state = "optimal";
  127                 break;
  128         default:
  129                 state = "unknown";
  130                 break;
  131         }
  132         device_printf(dev, "%juMB (%ju sectors) RAID volume '%s' is %s\n",
  133                       sectors / (1024 * 1024 / secsize), sectors,
  134                       ld_info->ld_config.properties.name,
  135                       state);
  136 
  137         sc->ld_disk = disk_alloc();
  138         sc->ld_disk->d_drv1 = sc;
  139         sc->ld_disk->d_maxsize = sc->ld_controller->mfi_max_io * secsize;
  140         sc->ld_disk->d_name = "mfid";
  141         sc->ld_disk->d_open = mfi_disk_open;
  142         sc->ld_disk->d_close = mfi_disk_close;
  143         sc->ld_disk->d_strategy = mfi_disk_strategy;
  144         sc->ld_disk->d_dump = mfi_disk_dump;
  145         sc->ld_disk->d_unit = sc->ld_unit;
  146         sc->ld_disk->d_sectorsize = secsize;
  147         sc->ld_disk->d_mediasize = sectors * secsize;
  148         if (sc->ld_disk->d_mediasize >= (1 * 1024 * 1024)) {
  149                 sc->ld_disk->d_fwheads = 255;
  150                 sc->ld_disk->d_fwsectors = 63;
  151         } else {
  152                 sc->ld_disk->d_fwheads = 64;
  153                 sc->ld_disk->d_fwsectors = 32;
  154         }
  155         disk_create(sc->ld_disk, DISK_VERSION);
  156 
  157         return (0);
  158 }
  159 
  160 static int
  161 mfi_disk_detach(device_t dev)
  162 {
  163         struct mfi_disk *sc;
  164 
  165         sc = device_get_softc(dev);
  166 
  167         mtx_lock(&sc->ld_controller->mfi_io_lock);
  168         if (((sc->ld_disk->d_flags & DISKFLAG_OPEN) ||
  169             (sc->ld_flags & MFI_DISK_FLAGS_OPEN)) &&
  170             (sc->ld_controller->mfi_keep_deleted_volumes ||
  171             sc->ld_controller->mfi_detaching)) {
  172                 mtx_unlock(&sc->ld_controller->mfi_io_lock);
  173                 return (EBUSY);
  174         }
  175         mtx_unlock(&sc->ld_controller->mfi_io_lock);
  176 
  177         disk_destroy(sc->ld_disk);
  178         mtx_lock(&sc->ld_controller->mfi_io_lock);
  179         TAILQ_REMOVE(&sc->ld_controller->mfi_ld_tqh, sc, ld_link);
  180         mtx_unlock(&sc->ld_controller->mfi_io_lock);
  181         free(sc->ld_info, M_MFIBUF);
  182         return (0);
  183 }
  184 
  185 static int
  186 mfi_disk_open(struct disk *dp)
  187 {
  188         struct mfi_disk *sc;
  189         int error;
  190 
  191         sc = dp->d_drv1;
  192         mtx_lock(&sc->ld_controller->mfi_io_lock);
  193         if (sc->ld_flags & MFI_DISK_FLAGS_DISABLED)
  194                 error = ENXIO;
  195         else {
  196                 sc->ld_flags |= MFI_DISK_FLAGS_OPEN;
  197                 error = 0;
  198         }
  199         mtx_unlock(&sc->ld_controller->mfi_io_lock);
  200 
  201         return (error);
  202 }
  203 
  204 static int
  205 mfi_disk_close(struct disk *dp)
  206 {
  207         struct mfi_disk *sc;
  208 
  209         sc = dp->d_drv1;
  210         mtx_lock(&sc->ld_controller->mfi_io_lock);
  211         sc->ld_flags &= ~MFI_DISK_FLAGS_OPEN;
  212         mtx_unlock(&sc->ld_controller->mfi_io_lock);
  213 
  214         return (0);
  215 }
  216 
  217 int
  218 mfi_disk_disable(struct mfi_disk *sc)
  219 {
  220 
  221         mtx_assert(&sc->ld_controller->mfi_io_lock, MA_OWNED);
  222         if (sc->ld_flags & MFI_DISK_FLAGS_OPEN) {
  223                 if (sc->ld_controller->mfi_delete_busy_volumes)
  224                         return (0);
  225                 device_printf(sc->ld_dev, "Unable to delete busy device\n");
  226                 return (EBUSY);
  227         }
  228         sc->ld_flags |= MFI_DISK_FLAGS_DISABLED;
  229         return (0);
  230 }
  231 
  232 void
  233 mfi_disk_enable(struct mfi_disk *sc)
  234 {
  235 
  236         mtx_assert(&sc->ld_controller->mfi_io_lock, MA_OWNED);
  237         sc->ld_flags &= ~MFI_DISK_FLAGS_DISABLED;
  238 }
  239 
  240 static void
  241 mfi_disk_strategy(struct bio *bio)
  242 {
  243         struct mfi_disk *sc;
  244         struct mfi_softc *controller;
  245 
  246         sc = bio->bio_disk->d_drv1;
  247 
  248         if (sc == NULL) {
  249                 bio->bio_error = EINVAL;
  250                 bio->bio_flags |= BIO_ERROR;
  251                 bio->bio_resid = bio->bio_bcount;
  252                 biodone(bio);
  253                 return;
  254         }
  255 
  256         controller = sc->ld_controller;
  257         bio->bio_driver1 = (void *)(uintptr_t)sc->ld_id;
  258         mtx_lock(&controller->mfi_io_lock);
  259         mfi_enqueue_bio(controller, bio);
  260         mfi_startio(controller);
  261         mtx_unlock(&controller->mfi_io_lock);
  262         return;
  263 }
  264 
  265 void
  266 mfi_disk_complete(struct bio *bio)
  267 {
  268         struct mfi_disk *sc;
  269         struct mfi_frame_header *hdr;
  270 
  271         sc = bio->bio_disk->d_drv1;
  272         hdr = bio->bio_driver1;
  273 
  274         if (bio->bio_flags & BIO_ERROR) {
  275                 if (bio->bio_error == 0)
  276                         bio->bio_error = EIO;
  277                 disk_err(bio, "hard error", -1, 1);
  278         } else {
  279                 bio->bio_resid = 0;
  280         }
  281         biodone(bio);
  282 }
  283 
  284 static int
  285 mfi_disk_dump(void *arg, void *virt, vm_offset_t phys, off_t offset, size_t len)
  286 {
  287         struct mfi_disk *sc;
  288         struct mfi_softc *parent_sc;
  289         struct disk *dp;
  290         int error;
  291 
  292         dp = arg;
  293         sc = dp->d_drv1;
  294         parent_sc = sc->ld_controller;
  295 
  296         if (len > 0) {
  297                 if ((error = mfi_dump_blocks(parent_sc, sc->ld_id, offset /
  298                     MFI_SECTOR_LEN, virt, len)) != 0)
  299                         return (error);
  300         } else {
  301                 /* mfi_sync_cache(parent_sc, sc->ld_id); */
  302         }
  303 
  304         return (0);
  305 }

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