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: releng/8.4/sys/dev/mfi/mfi_syspd.c 243826 2012-12-03 18:47:25Z delphij $");
   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 = sc->pd_controller->mfi_max_io * secsize;
  130         sc->pd_disk->d_name = "mfisyspd";
  131         sc->pd_disk->d_open = mfi_syspd_open;
  132         sc->pd_disk->d_close = mfi_syspd_close;
  133         sc->pd_disk->d_strategy = mfi_syspd_strategy;
  134         sc->pd_disk->d_dump = mfi_syspd_dump;
  135         sc->pd_disk->d_unit = sc->pd_unit;
  136         sc->pd_disk->d_sectorsize = secsize;
  137         sc->pd_disk->d_mediasize = sectors * secsize;
  138         if (sc->pd_disk->d_mediasize >= (1 * 1024 * 1024)) {
  139                 sc->pd_disk->d_fwheads = 255;
  140                 sc->pd_disk->d_fwsectors = 63;
  141         } else {
  142                 sc->pd_disk->d_fwheads = 64;
  143                 sc->pd_disk->d_fwsectors = 32;
  144         }
  145         disk_create(sc->pd_disk, DISK_VERSION);
  146 
  147         device_printf(dev, " SYSPD volume attached\n");
  148 
  149         return (0);
  150 }
  151 
  152 static int
  153 mfi_syspd_detach(device_t dev)
  154 {
  155         struct mfi_system_pd *sc;
  156 
  157         sc = device_get_softc(dev);
  158         device_printf(dev, "Detaching syspd\n");
  159         mtx_lock(&sc->pd_controller->mfi_io_lock);
  160         if (((sc->pd_disk->d_flags & DISKFLAG_OPEN) ||
  161             (sc->pd_flags & MFI_DISK_FLAGS_OPEN)) &&
  162             (sc->pd_controller->mfi_keep_deleted_volumes ||
  163             sc->pd_controller->mfi_detaching)) {
  164                 mtx_unlock(&sc->pd_controller->mfi_io_lock);
  165                 device_printf(dev, "Cant detach syspd\n");
  166                 return (EBUSY);
  167         }
  168         mtx_unlock(&sc->pd_controller->mfi_io_lock);
  169 
  170         disk_destroy(sc->pd_disk);
  171         mtx_lock(&sc->pd_controller->mfi_io_lock);
  172         TAILQ_REMOVE(&sc->pd_controller->mfi_syspd_tqh, sc, pd_link);
  173         mtx_unlock(&sc->pd_controller->mfi_io_lock);
  174         free(sc->pd_info, M_MFIBUF);
  175         return (0);
  176 }
  177 
  178 static int
  179 mfi_syspd_open(struct disk *dp)
  180 {
  181         struct mfi_system_pd *sc;
  182         int error;
  183 
  184         sc = dp->d_drv1;
  185         mtx_lock(&sc->pd_controller->mfi_io_lock);
  186         if (sc->pd_flags & MFI_DISK_FLAGS_DISABLED)
  187                 error = ENXIO;
  188         else {
  189                 sc->pd_flags |= MFI_DISK_FLAGS_OPEN;
  190                 error = 0;
  191         }
  192         mtx_unlock(&sc->pd_controller->mfi_io_lock);
  193         return (error);
  194 }
  195 
  196 static int
  197 mfi_syspd_close(struct disk *dp)
  198 {
  199         struct mfi_system_pd *sc;
  200 
  201         sc = dp->d_drv1;
  202         mtx_lock(&sc->pd_controller->mfi_io_lock);
  203         sc->pd_flags &= ~MFI_DISK_FLAGS_OPEN;
  204         mtx_unlock(&sc->pd_controller->mfi_io_lock);
  205 
  206         return (0);
  207 }
  208 
  209 int
  210 mfi_syspd_disable(struct mfi_system_pd *sc)
  211 {
  212 
  213         device_printf(sc->pd_dev, "syspd disable \n");
  214         mtx_assert(&sc->pd_controller->mfi_io_lock, MA_OWNED);
  215         if (sc->pd_flags & MFI_DISK_FLAGS_OPEN) {
  216                 if (sc->pd_controller->mfi_delete_busy_volumes)
  217                         return (0);
  218                 device_printf(sc->pd_dev,
  219                     "Unable to delete busy syspd device\n");
  220                 return (EBUSY);
  221         }
  222         sc->pd_flags |= MFI_DISK_FLAGS_DISABLED;
  223         return (0);
  224 }
  225 
  226 void
  227 mfi_syspd_enable(struct mfi_system_pd *sc)
  228 {
  229 
  230         device_printf(sc->pd_dev, "syspd enable \n");
  231         mtx_assert(&sc->pd_controller->mfi_io_lock, MA_OWNED);
  232         sc->pd_flags &= ~MFI_DISK_FLAGS_DISABLED;
  233 }
  234 
  235 static void
  236 mfi_syspd_strategy(struct bio *bio)
  237 {
  238         struct mfi_system_pd *sc;
  239         struct mfi_softc *controller;
  240 
  241         sc = bio->bio_disk->d_drv1;
  242 
  243         if (sc == NULL) {
  244                 bio->bio_error = EINVAL;
  245                 bio->bio_flags |= BIO_ERROR;
  246                 bio->bio_resid = bio->bio_bcount;
  247                 biodone(bio);
  248                 return;
  249         }
  250 
  251         controller = sc->pd_controller;
  252         bio->bio_driver1 = (void *)(uintptr_t)sc->pd_id;
  253         /* Mark it as system PD IO */
  254         bio->bio_driver2 = (void *)MFI_SYS_PD_IO;
  255         mtx_lock(&controller->mfi_io_lock);
  256         mfi_enqueue_bio(controller, bio);
  257         mfi_startio(controller);
  258         mtx_unlock(&controller->mfi_io_lock);
  259         return;
  260 }
  261 
  262 static int
  263 mfi_syspd_dump(void *arg, void *virt, vm_offset_t phys, off_t offset,
  264     size_t len)
  265 {
  266         struct mfi_system_pd *sc;
  267         struct mfi_softc *parent_sc;
  268         struct disk *dp;
  269         int error;
  270 
  271         dp = arg;
  272         sc = dp->d_drv1;
  273         parent_sc = sc->pd_controller;
  274 
  275         if (len > 0) {
  276                 if ((error = mfi_dump_syspd_blocks(parent_sc,
  277                     sc->pd_id, offset / MFI_SECTOR_LEN, virt, len)) != 0)
  278                         return (error);
  279         } else {
  280                 /* mfi_sync_cache(parent_sc, sc->ld_id); */
  281         }
  282         return (0);
  283 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/mfi/mfi_syspd.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/mfi/mfi_syspd.c