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: releng/8.3/sys/dev/mfi/mfi_disk.c 229612 2012-01-05 18:31:08Z jhb $");
   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/sysctl.h>
   39 #include <sys/uio.h>
   40 
   41 #include <sys/bio.h>
   42 #include <sys/bus.h>
   43 #include <sys/conf.h>
   44 #include <sys/disk.h>
   45 #include <geom/geom_disk.h>
   46 
   47 #include <vm/vm.h>
   48 #include <vm/pmap.h>
   49 
   50 #include <machine/md_var.h>
   51 #include <machine/bus.h>
   52 #include <sys/rman.h>
   53 
   54 #include <dev/mfi/mfireg.h>
   55 #include <dev/mfi/mfi_ioctl.h>
   56 #include <dev/mfi/mfivar.h>
   57 
   58 static int      mfi_disk_probe(device_t dev);
   59 static int      mfi_disk_attach(device_t dev);
   60 static int      mfi_disk_detach(device_t dev);
   61 
   62 static disk_open_t      mfi_disk_open;
   63 static disk_close_t     mfi_disk_close;
   64 static disk_strategy_t  mfi_disk_strategy;
   65 static dumper_t         mfi_disk_dump;
   66 
   67 static devclass_t       mfi_disk_devclass;
   68 
   69 static device_method_t mfi_disk_methods[] = {
   70         DEVMETHOD(device_probe,         mfi_disk_probe),
   71         DEVMETHOD(device_attach,        mfi_disk_attach),
   72         DEVMETHOD(device_detach,        mfi_disk_detach),
   73         { 0, 0 }
   74 };
   75 
   76 static driver_t mfi_disk_driver = {
   77         "mfid",
   78         mfi_disk_methods,
   79         sizeof(struct mfi_disk)
   80 };
   81 
   82 DRIVER_MODULE(mfid, mfi, mfi_disk_driver, mfi_disk_devclass, 0, 0);
   83 
   84 static int
   85 mfi_disk_probe(device_t dev)
   86 {
   87 
   88         return (0);
   89 }
   90 
   91 static int
   92 mfi_disk_attach(device_t dev)
   93 {
   94         struct mfi_disk *sc;
   95         struct mfi_ld_info *ld_info;
   96         uint64_t sectors;
   97         uint32_t secsize;
   98         char *state;
   99 
  100         sc = device_get_softc(dev);
  101         ld_info = device_get_ivars(dev);
  102 
  103         sc->ld_dev = dev;
  104         sc->ld_id = ld_info->ld_config.properties.ld.v.target_id;
  105         sc->ld_unit = device_get_unit(dev);
  106         sc->ld_info = ld_info;
  107         sc->ld_controller = device_get_softc(device_get_parent(dev));
  108         sc->ld_flags = 0;
  109 
  110         sectors = ld_info->size;
  111         secsize = MFI_SECTOR_LEN;
  112         mtx_lock(&sc->ld_controller->mfi_io_lock);
  113         TAILQ_INSERT_TAIL(&sc->ld_controller->mfi_ld_tqh, sc, ld_link);
  114         mtx_unlock(&sc->ld_controller->mfi_io_lock);
  115 
  116         switch (ld_info->ld_config.params.state) {
  117         case MFI_LD_STATE_OFFLINE:
  118                 state = "offline";
  119                 break;
  120         case MFI_LD_STATE_PARTIALLY_DEGRADED:
  121                 state = "partially degraded";
  122                 break;
  123         case MFI_LD_STATE_DEGRADED:
  124                 state = "degraded";
  125                 break;
  126         case MFI_LD_STATE_OPTIMAL:
  127                 state = "optimal";
  128                 break;
  129         default:
  130                 state = "unknown";
  131                 break;
  132         }
  133         device_printf(dev, "%juMB (%ju sectors) RAID volume '%s' is %s\n",
  134                       sectors / (1024 * 1024 / secsize), sectors,
  135                       ld_info->ld_config.properties.name,
  136                       state);
  137 
  138         sc->ld_disk = disk_alloc();
  139         sc->ld_disk->d_drv1 = sc;
  140         sc->ld_disk->d_maxsize = min(sc->ld_controller->mfi_max_io * secsize,
  141             (sc->ld_controller->mfi_max_sge - 1) * PAGE_SIZE);
  142         sc->ld_disk->d_name = "mfid";
  143         sc->ld_disk->d_open = mfi_disk_open;
  144         sc->ld_disk->d_close = mfi_disk_close;
  145         sc->ld_disk->d_strategy = mfi_disk_strategy;
  146         sc->ld_disk->d_dump = mfi_disk_dump;
  147         sc->ld_disk->d_unit = sc->ld_unit;
  148         sc->ld_disk->d_sectorsize = secsize;
  149         sc->ld_disk->d_mediasize = sectors * secsize;
  150         if (sc->ld_disk->d_mediasize >= (1 * 1024 * 1024)) {
  151                 sc->ld_disk->d_fwheads = 255;
  152                 sc->ld_disk->d_fwsectors = 63;
  153         } else {
  154                 sc->ld_disk->d_fwheads = 64;
  155                 sc->ld_disk->d_fwsectors = 32;
  156         }
  157         disk_create(sc->ld_disk, DISK_VERSION);
  158 
  159         return (0);
  160 }
  161 
  162 static int
  163 mfi_disk_detach(device_t dev)
  164 {
  165         struct mfi_disk *sc;
  166 
  167         sc = device_get_softc(dev);
  168 
  169         mtx_lock(&sc->ld_controller->mfi_io_lock);
  170         if (((sc->ld_disk->d_flags & DISKFLAG_OPEN) ||
  171             (sc->ld_flags & MFI_DISK_FLAGS_OPEN)) &&
  172             (sc->ld_controller->mfi_keep_deleted_volumes ||
  173             sc->ld_controller->mfi_detaching)) {
  174                 mtx_unlock(&sc->ld_controller->mfi_io_lock);
  175                 return (EBUSY);
  176         }
  177         mtx_unlock(&sc->ld_controller->mfi_io_lock);
  178 
  179         disk_destroy(sc->ld_disk);
  180         mtx_lock(&sc->ld_controller->mfi_io_lock);
  181         TAILQ_REMOVE(&sc->ld_controller->mfi_ld_tqh, sc, ld_link);
  182         mtx_unlock(&sc->ld_controller->mfi_io_lock);
  183         free(sc->ld_info, M_MFIBUF);
  184         return (0);
  185 }
  186 
  187 static int
  188 mfi_disk_open(struct disk *dp)
  189 {
  190         struct mfi_disk *sc;
  191         int error;
  192 
  193         sc = dp->d_drv1;
  194         mtx_lock(&sc->ld_controller->mfi_io_lock);
  195         if (sc->ld_flags & MFI_DISK_FLAGS_DISABLED)
  196                 error = ENXIO;
  197         else {
  198                 sc->ld_flags |= MFI_DISK_FLAGS_OPEN;
  199                 error = 0;
  200         }
  201         mtx_unlock(&sc->ld_controller->mfi_io_lock);
  202 
  203         return (error);
  204 }
  205 
  206 static int
  207 mfi_disk_close(struct disk *dp)
  208 {
  209         struct mfi_disk *sc;
  210 
  211         sc = dp->d_drv1;
  212         mtx_lock(&sc->ld_controller->mfi_io_lock);
  213         sc->ld_flags &= ~MFI_DISK_FLAGS_OPEN;
  214         mtx_unlock(&sc->ld_controller->mfi_io_lock);
  215 
  216         return (0);
  217 }
  218 
  219 int
  220 mfi_disk_disable(struct mfi_disk *sc)
  221 {
  222 
  223         mtx_assert(&sc->ld_controller->mfi_io_lock, MA_OWNED);
  224         if (sc->ld_flags & MFI_DISK_FLAGS_OPEN) {
  225                 if (sc->ld_controller->mfi_delete_busy_volumes)
  226                         return (0);
  227                 device_printf(sc->ld_dev, "Unable to delete busy device\n");
  228                 return (EBUSY);
  229         }
  230         sc->ld_flags |= MFI_DISK_FLAGS_DISABLED;
  231         return (0);
  232 }
  233 
  234 void
  235 mfi_disk_enable(struct mfi_disk *sc)
  236 {
  237 
  238         mtx_assert(&sc->ld_controller->mfi_io_lock, MA_OWNED);
  239         sc->ld_flags &= ~MFI_DISK_FLAGS_DISABLED;
  240 }
  241 
  242 static void
  243 mfi_disk_strategy(struct bio *bio)
  244 {
  245         struct mfi_disk *sc;
  246         struct mfi_softc *controller;
  247 
  248         sc = bio->bio_disk->d_drv1;
  249 
  250         if (sc == NULL) {
  251                 bio->bio_error = EINVAL;
  252                 bio->bio_flags |= BIO_ERROR;
  253                 bio->bio_resid = bio->bio_bcount;
  254                 biodone(bio);
  255                 return;
  256         }
  257 
  258         controller = sc->ld_controller;
  259         bio->bio_driver1 = (void *)(uintptr_t)sc->ld_id;
  260         mtx_lock(&controller->mfi_io_lock);
  261         mfi_enqueue_bio(controller, bio);
  262         mfi_startio(controller);
  263         mtx_unlock(&controller->mfi_io_lock);
  264         return;
  265 }
  266 
  267 void
  268 mfi_disk_complete(struct bio *bio)
  269 {
  270         struct mfi_disk *sc;
  271         struct mfi_frame_header *hdr;
  272 
  273         sc = bio->bio_disk->d_drv1;
  274         hdr = bio->bio_driver1;
  275 
  276         if (bio->bio_flags & BIO_ERROR) {
  277                 if (bio->bio_error == 0)
  278                         bio->bio_error = EIO;
  279                 disk_err(bio, "hard error", -1, 1);
  280         } else {
  281                 bio->bio_resid = 0;
  282         }
  283         biodone(bio);
  284 }
  285 
  286 static int
  287 mfi_disk_dump(void *arg, void *virt, vm_offset_t phys, off_t offset, size_t len)
  288 {
  289         struct mfi_disk *sc;
  290         struct mfi_softc *parent_sc;
  291         struct disk *dp;
  292         int error;
  293 
  294         dp = arg;
  295         sc = dp->d_drv1;
  296         parent_sc = sc->ld_controller;
  297 
  298         if (len > 0) {
  299                 if ((error = mfi_dump_blocks(parent_sc, sc->ld_id, offset /
  300                     MFI_SECTOR_LEN, virt, len)) != 0)
  301                         return (error);
  302         } else {
  303                 /* mfi_sync_cache(parent_sc, sc->ld_id); */
  304         }
  305 
  306         return (0);
  307 }

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