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_syspd.c

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    1 /*-
    2  * Redistribution and use in source and binary forms, with or without
    3  * modification, are permitted provided that the following conditions
    4  * are met:
    5  *
    6  *            Copyright 1994-2009 The FreeBSD Project.
    7  *            All rights reserved.
    8  *
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  *    THIS SOFTWARE IS PROVIDED BY THE FREEBSD PROJECT``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   17  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   18  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FREEBSD PROJECT OR
   19  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   20  * EXEMPLARY,OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   22  * PROFITS; OR BUSINESS INTERRUPTION)HOWEVER CAUSED AND ON ANY THEORY
   23  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   24  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   25  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   26  *
   27  * The views and conclusions contained in the software and documentation
   28  * are those of the authors and should not be interpreted as representing
   29  * official policies,either expressed or implied, of the FreeBSD Project.
   30  */
   31 
   32 #include <sys/cdefs.h>
   33 __FBSDID("$FreeBSD: stable/11/sys/dev/mfi/mfi_syspd.c 331722 2018-03-29 02:50:57Z eadler $");
   34 
   35 #include "opt_mfi.h"
   36 
   37 #include <sys/param.h>
   38 #include <sys/systm.h>
   39 #include <sys/kernel.h>
   40 #include <sys/selinfo.h>
   41 #include <sys/module.h>
   42 #include <sys/malloc.h>
   43 #include <sys/sysctl.h>
   44 #include <sys/uio.h>
   45 
   46 #include <sys/bio.h>
   47 #include <sys/bus.h>
   48 #include <sys/conf.h>
   49 #include <sys/disk.h>
   50 #include <geom/geom_disk.h>
   51 
   52 #include <vm/vm.h>
   53 #include <vm/pmap.h>
   54 
   55 #include <machine/md_var.h>
   56 #include <machine/bus.h>
   57 #include <sys/rman.h>
   58 
   59 #include <dev/mfi/mfireg.h>
   60 #include <dev/mfi/mfi_ioctl.h>
   61 #include <dev/mfi/mfivar.h>
   62 
   63 static int      mfi_syspd_probe(device_t dev);
   64 static int      mfi_syspd_attach(device_t dev);
   65 static int      mfi_syspd_detach(device_t dev);
   66 
   67 static disk_open_t      mfi_syspd_open;
   68 static disk_close_t     mfi_syspd_close;
   69 static disk_strategy_t  mfi_syspd_strategy;
   70 static dumper_t         mfi_syspd_dump;
   71 
   72 static devclass_t       mfi_syspd_devclass;
   73 
   74 static device_method_t mfi_syspd_methods[] = {
   75         DEVMETHOD(device_probe,         mfi_syspd_probe),
   76         DEVMETHOD(device_attach,        mfi_syspd_attach),
   77         DEVMETHOD(device_detach,        mfi_syspd_detach),
   78         { 0, 0 }
   79 };
   80 
   81 static driver_t mfi_syspd_driver = {
   82         "mfisyspd",
   83         mfi_syspd_methods,
   84         sizeof(struct mfi_system_pd)
   85 };
   86 
   87 DRIVER_MODULE(mfisyspd, mfi, mfi_syspd_driver, mfi_syspd_devclass, 0, 0);
   88 
   89 static int
   90 mfi_syspd_probe(device_t dev)
   91 {
   92         return (0);
   93 }
   94 
   95 static int
   96 mfi_syspd_attach(device_t dev)
   97 {
   98         struct mfi_system_pd *sc;
   99         struct mfi_pd_info *pd_info;
  100         struct mfi_system_pending *syspd_pend;
  101         uint64_t sectors;
  102         uint32_t secsize;
  103 
  104         sc = device_get_softc(dev);
  105         pd_info = device_get_ivars(dev);
  106         sc->pd_dev = dev;
  107         sc->pd_id = pd_info->ref.v.device_id;
  108         sc->pd_unit = device_get_unit(dev);
  109         sc->pd_info = pd_info;
  110         sc->pd_controller = device_get_softc(device_get_parent(dev));
  111         sc->pd_flags = 0;
  112 
  113         sectors = pd_info->raw_size;
  114         secsize = MFI_SECTOR_LEN;
  115         mtx_lock(&sc->pd_controller->mfi_io_lock);
  116         TAILQ_INSERT_TAIL(&sc->pd_controller->mfi_syspd_tqh, sc, pd_link);
  117         TAILQ_FOREACH(syspd_pend, &sc->pd_controller->mfi_syspd_pend_tqh,
  118             pd_link) {
  119                 TAILQ_REMOVE(&sc->pd_controller->mfi_syspd_pend_tqh,
  120                     syspd_pend, pd_link);
  121                 free(syspd_pend, M_MFIBUF);
  122                 break;
  123         }
  124         mtx_unlock(&sc->pd_controller->mfi_io_lock);
  125         device_printf(dev, "%juMB (%ju sectors) SYSPD volume (deviceid: %d)\n",
  126                       sectors / (1024 * 1024 / secsize), sectors, sc->pd_id);
  127         sc->pd_disk = disk_alloc();
  128         sc->pd_disk->d_drv1 = sc;
  129         sc->pd_disk->d_maxsize = min(sc->pd_controller->mfi_max_io * secsize,
  130                 (sc->pd_controller->mfi_max_sge - 1) * PAGE_SIZE);
  131         sc->pd_disk->d_name = "mfisyspd";
  132         sc->pd_disk->d_open = mfi_syspd_open;
  133         sc->pd_disk->d_close = mfi_syspd_close;
  134         sc->pd_disk->d_strategy = mfi_syspd_strategy;
  135         sc->pd_disk->d_dump = mfi_syspd_dump;
  136         sc->pd_disk->d_unit = sc->pd_unit;
  137         sc->pd_disk->d_sectorsize = secsize;
  138         sc->pd_disk->d_mediasize = sectors * secsize;
  139         if (sc->pd_disk->d_mediasize >= (1 * 1024 * 1024)) {
  140                 sc->pd_disk->d_fwheads = 255;
  141                 sc->pd_disk->d_fwsectors = 63;
  142         } else {
  143                 sc->pd_disk->d_fwheads = 64;
  144                 sc->pd_disk->d_fwsectors = 32;
  145         }
  146         sc->pd_disk->d_flags = DISKFLAG_UNMAPPED_BIO;
  147         disk_create(sc->pd_disk, DISK_VERSION);
  148 
  149         device_printf(dev, " SYSPD volume attached\n");
  150 
  151         return (0);
  152 }
  153 
  154 static int
  155 mfi_syspd_detach(device_t dev)
  156 {
  157         struct mfi_system_pd *sc;
  158 
  159         sc = device_get_softc(dev);
  160         device_printf(dev, "Detaching syspd\n");
  161         mtx_lock(&sc->pd_controller->mfi_io_lock);
  162         if (((sc->pd_disk->d_flags & DISKFLAG_OPEN) ||
  163             (sc->pd_flags & MFI_DISK_FLAGS_OPEN)) &&
  164             (sc->pd_controller->mfi_keep_deleted_volumes ||
  165             sc->pd_controller->mfi_detaching)) {
  166                 mtx_unlock(&sc->pd_controller->mfi_io_lock);
  167                 device_printf(dev, "Cant detach syspd\n");
  168                 return (EBUSY);
  169         }
  170         mtx_unlock(&sc->pd_controller->mfi_io_lock);
  171 
  172         disk_destroy(sc->pd_disk);
  173         mtx_lock(&sc->pd_controller->mfi_io_lock);
  174         TAILQ_REMOVE(&sc->pd_controller->mfi_syspd_tqh, sc, pd_link);
  175         mtx_unlock(&sc->pd_controller->mfi_io_lock);
  176         free(sc->pd_info, M_MFIBUF);
  177         return (0);
  178 }
  179 
  180 static int
  181 mfi_syspd_open(struct disk *dp)
  182 {
  183         struct mfi_system_pd *sc;
  184         int error;
  185 
  186         sc = dp->d_drv1;
  187         mtx_lock(&sc->pd_controller->mfi_io_lock);
  188         if (sc->pd_flags & MFI_DISK_FLAGS_DISABLED)
  189                 error = ENXIO;
  190         else {
  191                 sc->pd_flags |= MFI_DISK_FLAGS_OPEN;
  192                 error = 0;
  193         }
  194         mtx_unlock(&sc->pd_controller->mfi_io_lock);
  195         return (error);
  196 }
  197 
  198 static int
  199 mfi_syspd_close(struct disk *dp)
  200 {
  201         struct mfi_system_pd *sc;
  202 
  203         sc = dp->d_drv1;
  204         mtx_lock(&sc->pd_controller->mfi_io_lock);
  205         sc->pd_flags &= ~MFI_DISK_FLAGS_OPEN;
  206         mtx_unlock(&sc->pd_controller->mfi_io_lock);
  207 
  208         return (0);
  209 }
  210 
  211 int
  212 mfi_syspd_disable(struct mfi_system_pd *sc)
  213 {
  214 
  215         device_printf(sc->pd_dev, "syspd disable \n");
  216         mtx_assert(&sc->pd_controller->mfi_io_lock, MA_OWNED);
  217         if (sc->pd_flags & MFI_DISK_FLAGS_OPEN) {
  218                 if (sc->pd_controller->mfi_delete_busy_volumes)
  219                         return (0);
  220                 device_printf(sc->pd_dev,
  221                     "Unable to delete busy syspd device\n");
  222                 return (EBUSY);
  223         }
  224         sc->pd_flags |= MFI_DISK_FLAGS_DISABLED;
  225         return (0);
  226 }
  227 
  228 void
  229 mfi_syspd_enable(struct mfi_system_pd *sc)
  230 {
  231 
  232         device_printf(sc->pd_dev, "syspd enable \n");
  233         mtx_assert(&sc->pd_controller->mfi_io_lock, MA_OWNED);
  234         sc->pd_flags &= ~MFI_DISK_FLAGS_DISABLED;
  235 }
  236 
  237 static void
  238 mfi_syspd_strategy(struct bio *bio)
  239 {
  240         struct mfi_system_pd *sc;
  241         struct mfi_softc *controller;
  242 
  243         sc = bio->bio_disk->d_drv1;
  244 
  245         if (sc == NULL) {
  246                 bio->bio_error = EINVAL;
  247                 bio->bio_flags |= BIO_ERROR;
  248                 bio->bio_resid = bio->bio_bcount;
  249                 biodone(bio);
  250                 return;
  251         }
  252 
  253         controller = sc->pd_controller;
  254         bio->bio_driver1 = (void *)(uintptr_t)sc->pd_id;
  255         /* Mark it as system PD IO */
  256         bio->bio_driver2 = (void *)MFI_SYS_PD_IO;
  257         mtx_lock(&controller->mfi_io_lock);
  258         mfi_enqueue_bio(controller, bio);
  259         mfi_startio(controller);
  260         mtx_unlock(&controller->mfi_io_lock);
  261         return;
  262 }
  263 
  264 static int
  265 mfi_syspd_dump(void *arg, void *virt, vm_offset_t phys, off_t offset,
  266     size_t len)
  267 {
  268         struct mfi_system_pd *sc;
  269         struct mfi_softc *parent_sc;
  270         struct disk *dp;
  271         int error;
  272 
  273         dp = arg;
  274         sc = dp->d_drv1;
  275         parent_sc = sc->pd_controller;
  276 
  277         if (len > 0) {
  278                 if ((error = mfi_dump_syspd_blocks(parent_sc,
  279                     sc->pd_id, offset / MFI_SECTOR_LEN, virt, len)) != 0)
  280                         return (error);
  281         } else {
  282                 /* mfi_sync_cache(parent_sc, sc->ld_id); */
  283         }
  284         return (0);
  285 }

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