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

     /*-
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      *
      *            Copyright 1994-2009 The FreeBSD Project.
      *            All rights reserved.
      *
      * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     *    THIS SOFTWARE IS PROVIDED BY THE FREEBSD PROJECT``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
     * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FREEBSD PROJECT OR
     * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     * EXEMPLARY,OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     * PROFITS; OR BUSINESS INTERRUPTION)HOWEVER CAUSED AND ON ANY THEORY
     * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
     * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     *
     * The views and conclusions contained in the software and documentation
     * are those of the authors and should not be interpreted as representing
     * official policies,either expressed or implied, of the FreeBSD Project.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/10.0/sys/dev/mfi/mfi_syspd.c 254330 2013-08-14 15:50:34Z sbruno $");
    
    #include "opt_mfi.h"
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/selinfo.h>
    #include <sys/module.h>
    #include <sys/malloc.h>
    #include <sys/sysctl.h>
    #include <sys/uio.h>
    
    #include <sys/bio.h>
    #include <sys/bus.h>
    #include <sys/conf.h>
    #include <sys/disk.h>
    #include <geom/geom_disk.h>
    
    #include <vm/vm.h>
    #include <vm/pmap.h>
    
    #include <machine/md_var.h>
    #include <machine/bus.h>
    #include <sys/rman.h>
    
    #include <dev/mfi/mfireg.h>
    #include <dev/mfi/mfi_ioctl.h>
    #include <dev/mfi/mfivar.h>
    
    static int      mfi_syspd_probe(device_t dev);
    static int      mfi_syspd_attach(device_t dev);
    static int      mfi_syspd_detach(device_t dev);
    
    static disk_open_t      mfi_syspd_open;
    static disk_close_t     mfi_syspd_close;
    static disk_strategy_t  mfi_syspd_strategy;
    static dumper_t         mfi_syspd_dump;
    
    static devclass_t       mfi_syspd_devclass;
    
    static device_method_t mfi_syspd_methods[] = {
            DEVMETHOD(device_probe,         mfi_syspd_probe),
            DEVMETHOD(device_attach,        mfi_syspd_attach),
            DEVMETHOD(device_detach,        mfi_syspd_detach),
            { 0, 0 }
    };
    
    static driver_t mfi_syspd_driver = {
            "mfisyspd",
            mfi_syspd_methods,
            sizeof(struct mfi_system_pd)
    };
    
    DRIVER_MODULE(mfisyspd, mfi, mfi_syspd_driver, mfi_syspd_devclass, 0, 0);
    
    static int
    mfi_syspd_probe(device_t dev)
    {
            return (0);
    }
    
    static int
    mfi_syspd_attach(device_t dev)
    {
            struct mfi_system_pd *sc;
            struct mfi_pd_info *pd_info;
           struct mfi_system_pending *syspd_pend;
           uint64_t sectors;
           uint32_t secsize;
   
           sc = device_get_softc(dev);
           pd_info = device_get_ivars(dev);
           sc->pd_dev = dev;
           sc->pd_id = pd_info->ref.v.device_id;
           sc->pd_unit = device_get_unit(dev);
           sc->pd_info = pd_info;
           sc->pd_controller = device_get_softc(device_get_parent(dev));
           sc->pd_flags = 0;
   
           sectors = pd_info->raw_size;
           secsize = MFI_SECTOR_LEN;
           mtx_lock(&sc->pd_controller->mfi_io_lock);
           TAILQ_INSERT_TAIL(&sc->pd_controller->mfi_syspd_tqh, sc, pd_link);
           TAILQ_FOREACH(syspd_pend, &sc->pd_controller->mfi_syspd_pend_tqh,
               pd_link) {
                   TAILQ_REMOVE(&sc->pd_controller->mfi_syspd_pend_tqh,
                       syspd_pend, pd_link);
                   free(syspd_pend, M_MFIBUF);
                   break;
           }
           mtx_unlock(&sc->pd_controller->mfi_io_lock);
           device_printf(dev, "%juMB (%ju sectors) SYSPD volume (deviceid: %d)\n",
                         sectors / (1024 * 1024 / secsize), sectors, sc->pd_id);
           sc->pd_disk = disk_alloc();
           sc->pd_disk->d_drv1 = sc;
           sc->pd_disk->d_maxsize = min(sc->pd_controller->mfi_max_io * secsize,
                   (sc->pd_controller->mfi_max_sge - 1) * PAGE_SIZE);
           sc->pd_disk->d_name = "mfisyspd";
           sc->pd_disk->d_open = mfi_syspd_open;
           sc->pd_disk->d_close = mfi_syspd_close;
           sc->pd_disk->d_strategy = mfi_syspd_strategy;
           sc->pd_disk->d_dump = mfi_syspd_dump;
           sc->pd_disk->d_unit = sc->pd_unit;
           sc->pd_disk->d_sectorsize = secsize;
           sc->pd_disk->d_mediasize = sectors * secsize;
           if (sc->pd_disk->d_mediasize >= (1 * 1024 * 1024)) {
                   sc->pd_disk->d_fwheads = 255;
                   sc->pd_disk->d_fwsectors = 63;
           } else {
                   sc->pd_disk->d_fwheads = 64;
                   sc->pd_disk->d_fwsectors = 32;
           }
           disk_create(sc->pd_disk, DISK_VERSION);
   
           device_printf(dev, " SYSPD volume attached\n");
   
           return (0);
   }
   
   static int
   mfi_syspd_detach(device_t dev)
   {
           struct mfi_system_pd *sc;
   
           sc = device_get_softc(dev);
           device_printf(dev, "Detaching syspd\n");
           mtx_lock(&sc->pd_controller->mfi_io_lock);
           if (((sc->pd_disk->d_flags & DISKFLAG_OPEN) ||
               (sc->pd_flags & MFI_DISK_FLAGS_OPEN)) &&
               (sc->pd_controller->mfi_keep_deleted_volumes ||
               sc->pd_controller->mfi_detaching)) {
                   mtx_unlock(&sc->pd_controller->mfi_io_lock);
                   device_printf(dev, "Cant detach syspd\n");
                   return (EBUSY);
           }
           mtx_unlock(&sc->pd_controller->mfi_io_lock);
   
           disk_destroy(sc->pd_disk);
           mtx_lock(&sc->pd_controller->mfi_io_lock);
           TAILQ_REMOVE(&sc->pd_controller->mfi_syspd_tqh, sc, pd_link);
           mtx_unlock(&sc->pd_controller->mfi_io_lock);
           free(sc->pd_info, M_MFIBUF);
           return (0);
   }
   
   static int
   mfi_syspd_open(struct disk *dp)
   {
           struct mfi_system_pd *sc;
           int error;
   
           sc = dp->d_drv1;
           mtx_lock(&sc->pd_controller->mfi_io_lock);
           if (sc->pd_flags & MFI_DISK_FLAGS_DISABLED)
                   error = ENXIO;
           else {
                   sc->pd_flags |= MFI_DISK_FLAGS_OPEN;
                   error = 0;
           }
           mtx_unlock(&sc->pd_controller->mfi_io_lock);
           return (error);
   }
   
   static int
   mfi_syspd_close(struct disk *dp)
   {
           struct mfi_system_pd *sc;
   
           sc = dp->d_drv1;
           mtx_lock(&sc->pd_controller->mfi_io_lock);
           sc->pd_flags &= ~MFI_DISK_FLAGS_OPEN;
           mtx_unlock(&sc->pd_controller->mfi_io_lock);
   
           return (0);
   }
   
   int
   mfi_syspd_disable(struct mfi_system_pd *sc)
   {
   
           device_printf(sc->pd_dev, "syspd disable \n");
           mtx_assert(&sc->pd_controller->mfi_io_lock, MA_OWNED);
           if (sc->pd_flags & MFI_DISK_FLAGS_OPEN) {
                   if (sc->pd_controller->mfi_delete_busy_volumes)
                           return (0);
                   device_printf(sc->pd_dev,
                       "Unable to delete busy syspd device\n");
                   return (EBUSY);
           }
           sc->pd_flags |= MFI_DISK_FLAGS_DISABLED;
           return (0);
   }
   
   void
   mfi_syspd_enable(struct mfi_system_pd *sc)
   {
   
           device_printf(sc->pd_dev, "syspd enable \n");
           mtx_assert(&sc->pd_controller->mfi_io_lock, MA_OWNED);
           sc->pd_flags &= ~MFI_DISK_FLAGS_DISABLED;
   }
   
   static void
   mfi_syspd_strategy(struct bio *bio)
   {
           struct mfi_system_pd *sc;
           struct mfi_softc *controller;
   
           sc = bio->bio_disk->d_drv1;
   
           if (sc == NULL) {
                   bio->bio_error = EINVAL;
                   bio->bio_flags |= BIO_ERROR;
                   bio->bio_resid = bio->bio_bcount;
                   biodone(bio);
                   return;
           }
   
           controller = sc->pd_controller;
           bio->bio_driver1 = (void *)(uintptr_t)sc->pd_id;
           /* Mark it as system PD IO */
           bio->bio_driver2 = (void *)MFI_SYS_PD_IO;
           mtx_lock(&controller->mfi_io_lock);
           mfi_enqueue_bio(controller, bio);
           mfi_startio(controller);
           mtx_unlock(&controller->mfi_io_lock);
           return;
   }
   
   static int
   mfi_syspd_dump(void *arg, void *virt, vm_offset_t phys, off_t offset,
       size_t len)
   {
           struct mfi_system_pd *sc;
           struct mfi_softc *parent_sc;
           struct disk *dp;
           int error;
   
           dp = arg;
           sc = dp->d_drv1;
           parent_sc = sc->pd_controller;
   
           if (len > 0) {
                   if ((error = mfi_dump_syspd_blocks(parent_sc,
                       sc->pd_id, offset / MFI_SECTOR_LEN, virt, len)) != 0)
                           return (error);
           } else {
                   /* mfi_sync_cache(parent_sc, sc->ld_id); */
           }
           return (0);
   }

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