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: stable/11/sys/dev/mfi/mfi_disk.c 331722 2018-03-29 02:50:57Z eadler $");
   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         struct mfi_disk_pending *ld_pend;
   97         uint64_t sectors;
   98         uint32_t secsize;
   99         char *state;
  100 
  101         sc = device_get_softc(dev);
  102         ld_info = device_get_ivars(dev);
  103 
  104         sc->ld_dev = dev;
  105         sc->ld_id = ld_info->ld_config.properties.ld.v.target_id;
  106         sc->ld_unit = device_get_unit(dev);
  107         sc->ld_info = ld_info;
  108         sc->ld_controller = device_get_softc(device_get_parent(dev));
  109         sc->ld_flags = 0;
  110 
  111         sectors = ld_info->size;
  112         secsize = MFI_SECTOR_LEN;
  113         mtx_lock(&sc->ld_controller->mfi_io_lock);
  114         TAILQ_INSERT_TAIL(&sc->ld_controller->mfi_ld_tqh, sc, ld_link);
  115         TAILQ_FOREACH(ld_pend, &sc->ld_controller->mfi_ld_pend_tqh,
  116             ld_link) {
  117                 TAILQ_REMOVE(&sc->ld_controller->mfi_ld_pend_tqh,
  118                     ld_pend, ld_link);
  119                 free(ld_pend, M_MFIBUF);
  120                 break;
  121         }
  122         mtx_unlock(&sc->ld_controller->mfi_io_lock);
  123 
  124         switch (ld_info->ld_config.params.state) {
  125         case MFI_LD_STATE_OFFLINE:
  126                 state = "offline";
  127                 break;
  128         case MFI_LD_STATE_PARTIALLY_DEGRADED:
  129                 state = "partially degraded";
  130                 break;
  131         case MFI_LD_STATE_DEGRADED:
  132                 state = "degraded";
  133                 break;
  134         case MFI_LD_STATE_OPTIMAL:
  135                 state = "optimal";
  136                 break;
  137         default:
  138                 state = "unknown";
  139                 break;
  140         }
  141 
  142         if ( strlen(ld_info->ld_config.properties.name) == 0 ) {
  143                 device_printf(dev,
  144                       "%juMB (%ju sectors) RAID volume (no label) is %s\n",
  145                        sectors / (1024 * 1024 / secsize), sectors, state);
  146         } else {
  147                 device_printf(dev,
  148                       "%juMB (%ju sectors) RAID volume '%s' is %s\n",
  149                       sectors / (1024 * 1024 / secsize), sectors,
  150                       ld_info->ld_config.properties.name, state);
  151         }
  152 
  153         sc->ld_disk = disk_alloc();
  154         sc->ld_disk->d_drv1 = sc;
  155         sc->ld_disk->d_maxsize = min(sc->ld_controller->mfi_max_io * secsize,
  156             (sc->ld_controller->mfi_max_sge - 1) * PAGE_SIZE);
  157         sc->ld_disk->d_name = "mfid";
  158         sc->ld_disk->d_open = mfi_disk_open;
  159         sc->ld_disk->d_close = mfi_disk_close;
  160         sc->ld_disk->d_strategy = mfi_disk_strategy;
  161         sc->ld_disk->d_dump = mfi_disk_dump;
  162         sc->ld_disk->d_unit = sc->ld_unit;
  163         sc->ld_disk->d_sectorsize = secsize;
  164         sc->ld_disk->d_mediasize = sectors * secsize;
  165         if (sc->ld_disk->d_mediasize >= (1 * 1024 * 1024)) {
  166                 sc->ld_disk->d_fwheads = 255;
  167                 sc->ld_disk->d_fwsectors = 63;
  168         } else {
  169                 sc->ld_disk->d_fwheads = 64;
  170                 sc->ld_disk->d_fwsectors = 32;
  171         }
  172         sc->ld_disk->d_flags = DISKFLAG_UNMAPPED_BIO;
  173         disk_create(sc->ld_disk, DISK_VERSION);
  174 
  175         return (0);
  176 }
  177 
  178 static int
  179 mfi_disk_detach(device_t dev)
  180 {
  181         struct mfi_disk *sc;
  182 
  183         sc = device_get_softc(dev);
  184 
  185         mtx_lock(&sc->ld_controller->mfi_io_lock);
  186         if (((sc->ld_disk->d_flags & DISKFLAG_OPEN) ||
  187             (sc->ld_flags & MFI_DISK_FLAGS_OPEN)) &&
  188             (sc->ld_controller->mfi_keep_deleted_volumes ||
  189             sc->ld_controller->mfi_detaching)) {
  190                 mtx_unlock(&sc->ld_controller->mfi_io_lock);
  191                 return (EBUSY);
  192         }
  193         mtx_unlock(&sc->ld_controller->mfi_io_lock);
  194 
  195         disk_destroy(sc->ld_disk);
  196         mtx_lock(&sc->ld_controller->mfi_io_lock);
  197         TAILQ_REMOVE(&sc->ld_controller->mfi_ld_tqh, sc, ld_link);
  198         mtx_unlock(&sc->ld_controller->mfi_io_lock);
  199         free(sc->ld_info, M_MFIBUF);
  200         return (0);
  201 }
  202 
  203 static int
  204 mfi_disk_open(struct disk *dp)
  205 {
  206         struct mfi_disk *sc;
  207         int error;
  208 
  209         sc = dp->d_drv1;
  210         mtx_lock(&sc->ld_controller->mfi_io_lock);
  211         if (sc->ld_flags & MFI_DISK_FLAGS_DISABLED)
  212                 error = ENXIO;
  213         else {
  214                 sc->ld_flags |= MFI_DISK_FLAGS_OPEN;
  215                 error = 0;
  216         }
  217         mtx_unlock(&sc->ld_controller->mfi_io_lock);
  218 
  219         return (error);
  220 }
  221 
  222 static int
  223 mfi_disk_close(struct disk *dp)
  224 {
  225         struct mfi_disk *sc;
  226 
  227         sc = dp->d_drv1;
  228         mtx_lock(&sc->ld_controller->mfi_io_lock);
  229         sc->ld_flags &= ~MFI_DISK_FLAGS_OPEN;
  230         mtx_unlock(&sc->ld_controller->mfi_io_lock);
  231 
  232         return (0);
  233 }
  234 
  235 int
  236 mfi_disk_disable(struct mfi_disk *sc)
  237 {
  238 
  239         mtx_assert(&sc->ld_controller->mfi_io_lock, MA_OWNED);
  240         if (sc->ld_flags & MFI_DISK_FLAGS_OPEN) {
  241                 if (sc->ld_controller->mfi_delete_busy_volumes)
  242                         return (0);
  243                 device_printf(sc->ld_dev, "Unable to delete busy ld device\n");
  244                 return (EBUSY);
  245         }
  246         sc->ld_flags |= MFI_DISK_FLAGS_DISABLED;
  247         return (0);
  248 }
  249 
  250 void
  251 mfi_disk_enable(struct mfi_disk *sc)
  252 {
  253 
  254         mtx_assert(&sc->ld_controller->mfi_io_lock, MA_OWNED);
  255         sc->ld_flags &= ~MFI_DISK_FLAGS_DISABLED;
  256 }
  257 
  258 static void
  259 mfi_disk_strategy(struct bio *bio)
  260 {
  261         struct mfi_disk *sc;
  262         struct mfi_softc *controller;
  263 
  264         sc = bio->bio_disk->d_drv1;
  265 
  266         if (sc == NULL) {
  267                 bio->bio_error = EINVAL;
  268                 bio->bio_flags |= BIO_ERROR;
  269                 bio->bio_resid = bio->bio_bcount;
  270                 biodone(bio);
  271                 return;
  272         }
  273 
  274         controller = sc->ld_controller;
  275         if (controller->adpreset) {
  276                 bio->bio_error = EBUSY;
  277                 return;
  278         }
  279 
  280         if (controller->hw_crit_error) {
  281                 bio->bio_error = EBUSY;
  282                 return;
  283         }
  284 
  285         if (controller->issuepend_done == 0) {
  286                 bio->bio_error = EBUSY;
  287                 return;
  288         }
  289 
  290         bio->bio_driver1 = (void *)(uintptr_t)sc->ld_id;
  291         /* Mark it as LD IO */
  292         bio->bio_driver2 = (void *)MFI_LD_IO;
  293         mtx_lock(&controller->mfi_io_lock);
  294         mfi_enqueue_bio(controller, bio);
  295         mfi_startio(controller);
  296         mtx_unlock(&controller->mfi_io_lock);
  297         return;
  298 }
  299 
  300 void
  301 mfi_disk_complete(struct bio *bio)
  302 {
  303         struct mfi_disk *sc;
  304         struct mfi_frame_header *hdr;
  305 
  306         sc = bio->bio_disk->d_drv1;
  307         hdr = bio->bio_driver1;
  308 
  309         if (bio->bio_flags & BIO_ERROR) {
  310                 bio->bio_resid = bio->bio_bcount;
  311                 if (bio->bio_error == 0)
  312                         bio->bio_error = EIO;
  313                 disk_err(bio, "hard error", -1, 1);
  314         } else {
  315                 bio->bio_resid = 0;
  316         }
  317         biodone(bio);
  318 }
  319 
  320 static int
  321 mfi_disk_dump(void *arg, void *virt, vm_offset_t phys, off_t offset, size_t len)
  322 {
  323         struct mfi_disk *sc;
  324         struct mfi_softc *parent_sc;
  325         struct disk *dp;
  326         int error;
  327 
  328         dp = arg;
  329         sc = dp->d_drv1;
  330         parent_sc = sc->ld_controller;
  331 
  332         if (len > 0) {
  333                 if ((error = mfi_dump_blocks(parent_sc, sc->ld_id, offset /
  334                     MFI_SECTOR_LEN, virt, len)) != 0)
  335                         return (error);
  336         } else {
  337                 /* mfi_sync_cache(parent_sc, sc->ld_id); */
  338         }
  339 
  340         return (0);
  341 }

Cache object: e61d995753ad4a7073a014e8f7379e95


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