FreeBSD/Linux Kernel Cross Reference
sys/dev/raid/amr/amr_disk.c

     /*-
      * Copyright (c) 1999 Jonathan Lemon
      * Copyright (c) 1999, 2000 Michael Smith
      * Copyright (c) 2000 BSDi
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     * 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 AUTHOR AND CONTRIBUTORS ``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 AUTHOR 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.
     */
    /*-
     * Copyright (c) 2002 Eric Moore
     * Copyright (c) 2002 LSI Logic Corporation
     * All rights reserved.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 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.
     * 3. The party using or redistributing the source code and binary forms
     *    agrees to the disclaimer below and the terms and conditions set forth
     *    herein.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 AUTHOR 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.
     *
     * $FreeBSD: src/sys/dev/amr/amr_disk.c,v 1.39 2006/10/31 21:19:25 pjd Exp $
     */
    
    /*
     * Disk driver for AMI MegaRaid controllers
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    
    #include <sys/bio.h>
    #include <sys/bus.h>
    #include <sys/conf.h>
    #include <sys/dtype.h>
    
    #include <sys/rman.h>
    
    #include <dev/raid/amr/amrio.h>
    #include <dev/raid/amr/amrreg.h>
    #include <dev/raid/amr/amrvar.h>
    #include <dev/raid/amr/amr_tables.h>
    
    /* prototypes */
    static int amrd_probe(device_t dev);
    static int amrd_attach(device_t dev);
    static int amrd_detach(device_t dev);
    
    static  d_open_t        amrd_open;
    static  d_strategy_t    amrd_strategy;
    static  d_dump_t        amrd_dump;
    
    static struct dev_ops amrd_ops = {
            { "amrd", 0, D_DISK },
            .d_open = amrd_open,
            .d_strategy = amrd_strategy,
            .d_dump = amrd_dump,
    };
    
    static devclass_t       amrd_devclass;
    
    static device_method_t amrd_methods[] = {
       DEVMETHOD(device_probe,     amrd_probe),
       DEVMETHOD(device_attach,    amrd_attach),
       DEVMETHOD(device_detach,    amrd_detach),
       DEVMETHOD_END
   };
   
   static driver_t amrd_driver = {
       "amrd",
       amrd_methods,
       sizeof(struct amrd_softc)
   };
   
   DRIVER_MODULE_ORDERED(amrd, amr, amrd_driver, amrd_devclass, NULL, NULL,
       SI_ORDER_THIRD);
   
   static int
   amrd_open(struct dev_open_args *ap)
   {
       struct amrd_softc   *sc = ap->a_head.a_dev->si_drv1;
   
       debug_called(1);
   
       if (sc == NULL)
           return (ENXIO);
   
       /* controller not active? */
       if (sc->amrd_controller->amr_state & AMR_STATE_SHUTDOWN)
           return(ENXIO);
   
       return (0);
   }
   /********************************************************************************
    * System crashdump support
    */
   
   static int
   amrd_dump(struct dev_dump_args *ap)
   {
       cdev_t dev = ap->a_head.a_dev;
       off_t offset = ap->a_offset;
       void *virtual = ap->a_virtual;
       size_t length = ap->a_length;
       struct amrd_softc   *amrd_sc;
       struct amr_softc    *amr_sc;
       int                 error = 0;
   
       amrd_sc = (struct amrd_softc *)dev->si_drv1;
       if (amrd_sc == NULL)
           return(ENXIO);
       amr_sc  = (struct amr_softc *)amrd_sc->amrd_controller;
   
       if (length > 0) {
           int     driveno = amrd_sc->amrd_drive - amr_sc->amr_drive;
   
           error = amr_dump_blocks(amr_sc, driveno, offset / AMR_BLKSIZE,
               virtual, (int)length / AMR_BLKSIZE);
       }
       return(error);
   }
   
   /*
    * Read/write routine for a buffer.  Finds the proper unit, range checks
    * arguments, and schedules the transfer.  Does not wait for the transfer
    * to complete.  Multi-page transfers are supported.  All I/O requests must
    * be a multiple of a sector in length.
    */
   static int
   amrd_strategy(struct dev_strategy_args *ap)
   {
       cdev_t dev = ap->a_head.a_dev;
       struct bio *bio = ap->a_bio;
       struct buf *bp = bio->bio_buf;
       struct amrd_softc *sc = (struct amrd_softc *)dev->si_drv1;
   
       /* bogus disk? */
       if (sc == NULL) {
           bp->b_error = EINVAL;
           goto bad;
       }
       bio->bio_driver_info = sc;
   
       devstat_start_transaction(&sc->amrd_stats);
       amr_submit_bio(sc->amrd_controller, bio);
       return (0);
   
    bad:
       bp->b_flags |= B_ERROR;
   
       /*
        * Correctly set the buf to indicate a completed transfer
        */
       bp->b_resid = bp->b_bcount;
       biodone(bio);
       return (0);
   }
   
   void
   amrd_intr(void *data)
   {
       struct bio *bio = (struct bio *)data;
       struct buf *bp = bio->bio_buf;
       struct amrd_softc *sc = (struct amrd_softc *)bio->bio_driver_info;
   
       debug_called(2);
   
       devstat_end_transaction_buf(&sc->amrd_stats, bp);
       if (bp->b_flags & B_ERROR) {
           bp->b_error = EIO;
           debug(1, "i/o error\n");
       } else {
           bp->b_resid = 0;
       }
   
       biodone(bio);
   }
   
   static int
   amrd_probe(device_t dev)
   {
   
       debug_called(1);
   
       device_set_desc(dev, "LSILogic MegaRAID logical drive");
       return (0);
   }
   
   static int
   amrd_attach(device_t dev)
   {
       struct amrd_softc   *sc = (struct amrd_softc *)device_get_softc(dev);
       device_t            parent;
       struct disk_info info;
   
       debug_called(1);
   
       parent = device_get_parent(dev);
       sc->amrd_controller = (struct amr_softc *)device_get_softc(parent);
       sc->amrd_unit = device_get_unit(dev);
       sc->amrd_drive = device_get_ivars(dev);
       sc->amrd_dev = dev;
   
       device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n",
                     sc->amrd_drive->al_size / ((1024 * 1024) / AMR_BLKSIZE),
                     sc->amrd_drive->al_size, sc->amrd_drive->al_properties & AMR_DRV_RAID_MASK, 
                     amr_describe_code(amr_table_drvstate, AMR_DRV_CURSTATE(sc->amrd_drive->al_state)));
   
       devstat_add_entry(&sc->amrd_stats, "amrd", sc->amrd_unit, AMR_BLKSIZE,
                         DEVSTAT_NO_ORDERED_TAGS,
                         DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER, 
                         DEVSTAT_PRIORITY_ARRAY);
   
       sc->amrd_dev_t = disk_create(sc->amrd_unit, &sc->amrd_disk, &amrd_ops);
       sc->amrd_dev_t->si_drv1 = sc;
   
       /* set maximum I/O size to match the maximum s/g size */
       sc->amrd_dev_t->si_iosize_max = (AMR_NSEG - 1) * PAGE_SIZE;
   
       /*
        * Set disk info, as it appears that all needed data is available already.
        * Setting the disk info will also cause the probing to start.
        */
       bzero(&info, sizeof(info));
       info.d_media_blksize = AMR_BLKSIZE;                 /* optional */
       info.d_media_blocks = sc->amrd_drive->al_size;
   
       info.d_type = DTYPE_SCSI;                           /* mandatory */
       info.d_secpertrack = sc->amrd_drive->al_sectors;
       info.d_nheads = sc->amrd_drive->al_heads;
       info.d_ncylinders = sc->amrd_drive->al_cylinders;
       info.d_secpercyl = sc->amrd_drive->al_sectors * sc->amrd_drive->al_heads;
   
       disk_setdiskinfo(&sc->amrd_disk, &info);
   
       return (0);
   }
   
   static int
   amrd_detach(device_t dev)
   {
       struct amrd_softc *sc = (struct amrd_softc *)device_get_softc(dev);
   
       debug_called(1);
   
   #if 0 /* XXX swildner */
       if (sc->amrd_disk->d_flags & DISKFLAG_OPEN)
           return(EBUSY);
   #endif
   
       devstat_remove_entry(&sc->amrd_stats);
       disk_destroy(&sc->amrd_disk);
   
       return(0);
   }
   

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