0b7ed341e1
Previously the "struct disk" were owned by the device driver and this gave us problems when the device disappared and the users of that device were not immediately disappearing. Now the struct disk is allocate with a new call, disk_alloc() and owned by geom_disk and just abandonned by the device driver when disk_create() is called. Unfortunately, this results in a ton of "s/\./->/" changes to device drivers. Since I'm doing the sweep anyway, a couple of other API improvements have been carried out at the same time: The Giant awareness flag has been flipped from DISKFLAG_NOGIANT to DISKFLAG_NEEDSGIANT A version number have been added to disk_create() so that we can detect, report and ignore binary drivers with old ABI in the future. Manual page update to follow shortly.
286 lines
8.3 KiB
C
286 lines
8.3 KiB
C
/*-
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* Copyright (c) 1999 Jonathan Lemon
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* Copyright (c) 1999, 2000 Michael Smith
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* Copyright (c) 2000 BSDi
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 2002 Eric Moore
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* Copyright (c) 2002 LSI Logic Corporation
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The party using or redistributing the source code and binary forms
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* agrees to the disclaimer below and the terms and conditions set forth
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* herein.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Disk driver for AMI MegaRaid controllers
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <dev/amr/amr_compat.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <dev/amr/amrio.h>
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#include <dev/amr/amrreg.h>
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#include <dev/amr/amrvar.h>
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#include <dev/amr/amr_tables.h>
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/* prototypes */
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static int amrd_probe(device_t dev);
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static int amrd_attach(device_t dev);
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static int amrd_detach(device_t dev);
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static disk_open_t amrd_open;
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static disk_strategy_t amrd_strategy;
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static devclass_t amrd_devclass;
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#ifdef FREEBSD_4
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static int disks_registered = 0;
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#endif
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static device_method_t amrd_methods[] = {
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DEVMETHOD(device_probe, amrd_probe),
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DEVMETHOD(device_attach, amrd_attach),
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DEVMETHOD(device_detach, amrd_detach),
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{ 0, 0 }
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};
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static driver_t amrd_driver = {
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"amrd",
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amrd_methods,
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sizeof(struct amrd_softc)
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};
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DRIVER_MODULE(amrd, amr, amrd_driver, amrd_devclass, 0, 0);
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static int
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amrd_open(struct disk *dp)
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{
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struct amrd_softc *sc = (struct amrd_softc *)dp->d_drv1;
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#if __FreeBSD_version < 500000 /* old buf style */
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struct disklabel *label;
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#endif
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debug_called(1);
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if (sc == NULL)
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return (ENXIO);
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/* controller not active? */
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if (sc->amrd_controller->amr_state & AMR_STATE_SHUTDOWN)
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return(ENXIO);
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#if __FreeBSD_version < 500000 /* old buf style */
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label = &sc->amrd_disk.d_label;
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bzero(label, sizeof(*label));
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label->d_type = DTYPE_SCSI;
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label->d_secsize = AMR_BLKSIZE;
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label->d_nsectors = sc->amrd_drive->al_sectors;
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label->d_ntracks = sc->amrd_drive->al_heads;
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label->d_ncylinders = sc->amrd_drive->al_cylinders;
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label->d_secpercyl = sc->amrd_drive->al_sectors * sc->amrd_drive->al_heads;
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label->d_secperunit = sc->amrd_drive->al_size;
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#else
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sc->amrd_disk->d_sectorsize = AMR_BLKSIZE;
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sc->amrd_disk->d_mediasize = (off_t)sc->amrd_drive->al_size * AMR_BLKSIZE;
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sc->amrd_disk->d_fwsectors = sc->amrd_drive->al_sectors;
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sc->amrd_disk->d_fwheads = sc->amrd_drive->al_heads;
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#endif
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return (0);
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}
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/********************************************************************************
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* System crashdump support
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*/
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static int
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amrd_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length)
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{
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struct amrd_softc *amrd_sc;
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struct amr_softc *amr_sc;
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int error;
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struct disk *dp;
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dp = arg;
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amrd_sc = (struct amrd_softc *)dp->d_drv1;
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amr_sc = (struct amr_softc *)amrd_sc->amrd_controller;
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if (!amrd_sc || !amr_sc)
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return(ENXIO);
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if (length > 0) {
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int driveno = amrd_sc->amrd_drive - amr_sc->amr_drive;
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if ((error = amr_dump_blocks(amr_sc,driveno,offset / AMR_BLKSIZE ,(void *)virtual,(int) length / AMR_BLKSIZE )) != 0)
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return(error);
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}
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return(0);
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}
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/*
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* Read/write routine for a buffer. Finds the proper unit, range checks
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* arguments, and schedules the transfer. Does not wait for the transfer
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* to complete. Multi-page transfers are supported. All I/O requests must
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* be a multiple of a sector in length.
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*/
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static void
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amrd_strategy(struct bio *bio)
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{
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struct amrd_softc *sc = (struct amrd_softc *)bio->bio_disk->d_drv1;
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/* bogus disk? */
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if (sc == NULL) {
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bio->bio_error = EINVAL;
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goto bad;
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}
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amr_submit_bio(sc->amrd_controller, bio);
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return;
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bad:
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bio->bio_flags |= BIO_ERROR;
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/*
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* Correctly set the buf to indicate a completed transfer
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*/
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bio->bio_resid = bio->bio_bcount;
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biodone(bio);
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return;
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}
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void
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amrd_intr(void *data)
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{
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struct bio *bio = (struct bio *)data;
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debug_called(2);
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if (bio->bio_flags & BIO_ERROR) {
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bio->bio_error = EIO;
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debug(1, "i/o error\n");
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} else {
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bio->bio_resid = 0;
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}
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AMR_BIO_FINISH(bio);
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}
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static int
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amrd_probe(device_t dev)
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{
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debug_called(1);
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device_set_desc(dev, "LSILogic MegaRAID logical drive");
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return (0);
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}
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static int
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amrd_attach(device_t dev)
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{
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struct amrd_softc *sc = (struct amrd_softc *)device_get_softc(dev);
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device_t parent;
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debug_called(1);
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parent = device_get_parent(dev);
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sc->amrd_controller = (struct amr_softc *)device_get_softc(parent);
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sc->amrd_unit = device_get_unit(dev);
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sc->amrd_drive = device_get_ivars(dev);
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sc->amrd_dev = dev;
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device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n",
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sc->amrd_drive->al_size / ((1024 * 1024) / AMR_BLKSIZE),
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sc->amrd_drive->al_size, sc->amrd_drive->al_properties & AMR_DRV_RAID_MASK,
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amr_describe_code(amr_table_drvstate, AMR_DRV_CURSTATE(sc->amrd_drive->al_state)));
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sc->amrd_disk = disk_alloc();
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sc->amrd_disk->d_drv1 = sc;
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sc->amrd_disk->d_maxsize = (AMR_NSEG - 1) * PAGE_SIZE;
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sc->amrd_disk->d_open = amrd_open;
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sc->amrd_disk->d_strategy = amrd_strategy;
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sc->amrd_disk->d_name = "amrd";
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sc->amrd_disk->d_dump = (dumper_t *)amrd_dump;
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sc->amrd_disk->d_unit = sc->amrd_unit;
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sc->amrd_disk->d_flags = DISKFLAG_NEEDSGIANT;
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disk_create(sc->amrd_disk, DISK_VERSION);
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#ifdef FREEBSD_4
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disks_registered++;
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#endif
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return (0);
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}
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static int
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amrd_detach(device_t dev)
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{
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struct amrd_softc *sc = (struct amrd_softc *)device_get_softc(dev);
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debug_called(1);
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if (sc->amrd_disk->d_flags & DISKFLAG_OPEN)
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return(EBUSY);
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#ifdef FREEBSD_4
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if (--disks_registered == 0)
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cdevsw_remove(&amrddisk_cdevsw);
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#else
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disk_destroy(sc->amrd_disk);
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#endif
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return(0);
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}
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