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 = min(sc->ld_controller->mfi_max_io * secsize,
  140             (sc->ld_controller->mfi_max_sge - 1) * PAGE_SIZE);
  141         sc->ld_disk->d_name = "mfid";
  142         sc->ld_disk->d_open = mfi_disk_open;
  143         sc->ld_disk->d_close = mfi_disk_close;
  144         sc->ld_disk->d_strategy = mfi_disk_strategy;
  145         sc->ld_disk->d_dump = mfi_disk_dump;
  146         sc->ld_disk->d_unit = sc->ld_unit;
  147         sc->ld_disk->d_sectorsize = secsize;
  148         sc->ld_disk->d_mediasize = sectors * secsize;
  149         if (sc->ld_disk->d_mediasize >= (1 * 1024 * 1024)) {
  150                 sc->ld_disk->d_fwheads = 255;
  151                 sc->ld_disk->d_fwsectors = 63;
  152         } else {
  153                 sc->ld_disk->d_fwheads = 64;
  154                 sc->ld_disk->d_fwsectors = 32;
  155         }
  156         disk_create(sc->ld_disk, DISK_VERSION);
  157 
  158         return (0);
  159 }
  160 
  161 static int
  162 mfi_disk_detach(device_t dev)
  163 {
  164         struct mfi_disk *sc;
  165 
  166         sc = device_get_softc(dev);
  167 
  168         mtx_lock(&sc->ld_controller->mfi_io_lock);
  169         if (((sc->ld_disk->d_flags & DISKFLAG_OPEN) ||
  170             (sc->ld_flags & MFI_DISK_FLAGS_OPEN)) &&
  171             (sc->ld_controller->mfi_keep_deleted_volumes ||
  172             sc->ld_controller->mfi_detaching)) {
  173                 mtx_unlock(&sc->ld_controller->mfi_io_lock);
  174                 return (EBUSY);
  175         }
  176         mtx_unlock(&sc->ld_controller->mfi_io_lock);
  177 
  178         disk_destroy(sc->ld_disk);
  179         mtx_lock(&sc->ld_controller->mfi_io_lock);
  180         TAILQ_REMOVE(&sc->ld_controller->mfi_ld_tqh, sc, ld_link);
  181         mtx_unlock(&sc->ld_controller->mfi_io_lock);
  182         free(sc->ld_info, M_MFIBUF);
  183         return (0);
  184 }
  185 
  186 static int
  187 mfi_disk_open(struct disk *dp)
  188 {
  189         struct mfi_disk *sc;
  190         int error;
  191 
  192         sc = dp->d_drv1;
  193         mtx_lock(&sc->ld_controller->mfi_io_lock);
  194         if (sc->ld_flags & MFI_DISK_FLAGS_DISABLED)
  195                 error = ENXIO;
  196         else {
  197                 sc->ld_flags |= MFI_DISK_FLAGS_OPEN;
  198                 error = 0;
  199         }
  200         mtx_unlock(&sc->ld_controller->mfi_io_lock);
  201 
  202         return (error);
  203 }
  204 
  205 static int
  206 mfi_disk_close(struct disk *dp)
  207 {
  208         struct mfi_disk *sc;
  209 
  210         sc = dp->d_drv1;
  211         mtx_lock(&sc->ld_controller->mfi_io_lock);
  212         sc->ld_flags &= ~MFI_DISK_FLAGS_OPEN;
  213         mtx_unlock(&sc->ld_controller->mfi_io_lock);
  214 
  215         return (0);
  216 }
  217 
  218 int
  219 mfi_disk_disable(struct mfi_disk *sc)
  220 {
  221 
  222         mtx_assert(&sc->ld_controller->mfi_io_lock, MA_OWNED);
  223         if (sc->ld_flags & MFI_DISK_FLAGS_OPEN) {
  224                 if (sc->ld_controller->mfi_delete_busy_volumes)
  225                         return (0);
  226                 device_printf(sc->ld_dev, "Unable to delete busy device\n");
  227                 return (EBUSY);
  228         }
  229         sc->ld_flags |= MFI_DISK_FLAGS_DISABLED;
  230         return (0);
  231 }
  232 
  233 void
  234 mfi_disk_enable(struct mfi_disk *sc)
  235 {
  236 
  237         mtx_assert(&sc->ld_controller->mfi_io_lock, MA_OWNED);
  238         sc->ld_flags &= ~MFI_DISK_FLAGS_DISABLED;
  239 }
  240 
  241 static void
  242 mfi_disk_strategy(struct bio *bio)
  243 {
  244         struct mfi_disk *sc;
  245         struct mfi_softc *controller;
  246 
  247         sc = bio->bio_disk->d_drv1;
  248 
  249         if (sc == NULL) {
  250                 bio->bio_error = EINVAL;
  251                 bio->bio_flags |= BIO_ERROR;
  252                 bio->bio_resid = bio->bio_bcount;
  253                 biodone(bio);
  254                 return;
  255         }
  256 
  257         controller = sc->ld_controller;
  258         bio->bio_driver1 = (void *)(uintptr_t)sc->ld_id;
  259         mtx_lock(&controller->mfi_io_lock);
  260         mfi_enqueue_bio(controller, bio);
  261         mfi_startio(controller);
  262         mtx_unlock(&controller->mfi_io_lock);
  263         return;
  264 }
  265 
  266 void
  267 mfi_disk_complete(struct bio *bio)
  268 {
  269         struct mfi_disk *sc;
  270         struct mfi_frame_header *hdr;
  271 
  272         sc = bio->bio_disk->d_drv1;
  273         hdr = bio->bio_driver1;
  274 
  275         if (bio->bio_flags & BIO_ERROR) {
  276                 if (bio->bio_error == 0)
  277                         bio->bio_error = EIO;
  278                 disk_err(bio, "hard error", -1, 1);
  279         } else {
  280                 bio->bio_resid = 0;
  281         }
  282         biodone(bio);
  283 }
  284 
  285 static int
  286 mfi_disk_dump(void *arg, void *virt, vm_offset_t phys, off_t offset, size_t len)
  287 {
  288         struct mfi_disk *sc;
  289         struct mfi_softc *parent_sc;
  290         struct disk *dp;
  291         int error;
  292 
  293         dp = arg;
  294         sc = dp->d_drv1;
  295         parent_sc = sc->ld_controller;
  296 
  297         if (len > 0) {
  298                 if ((error = mfi_dump_blocks(parent_sc, sc->ld_id, offset /
  299                     MFI_SECTOR_LEN, virt, len)) != 0)
  300                         return (error);
  301         } else {
  302                 /* mfi_sync_cache(parent_sc, sc->ld_id); */
  303         }
  304 
  305         return (0);
  306 }

Cache object: 9d878a7681299c15c06ba28e31934c59


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