321 lines
7.0 KiB
C
321 lines
7.0 KiB
C
/*-
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* Copyright (c) 1999 Jonathan Lemon
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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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* $FreeBSD$
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*/
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/*
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* Disk driver for Compaq SMART RAID adapters.
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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/malloc.h>
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#include <sys/kernel.h>
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#include <sys/buf.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/devicestat.h>
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#include <sys/disklabel.h>
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#include <sys/diskslice.h>
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#if NPCI > 0
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#include <machine/bus_memio.h>
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#endif
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#include <machine/bus_pio.h>
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#include <machine/bus.h>
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#include <machine/clock.h>
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#include <sys/rman.h>
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#include <dev/ida/idareg.h>
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#include <dev/ida/idavar.h>
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/* prototypes */
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static void id_drvinit(void);
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static int idprobe(device_t dev);
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static int idattach(device_t dev);
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static d_open_t idopen;
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static d_close_t idclose;
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static d_strategy_t idstrategy;
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static d_ioctl_t idioctl;
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static d_psize_t idsize;
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#define ID_BDEV_MAJOR 29
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#define ID_CDEV_MAJOR 109
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#define WD_BDEV_MAJOR 0
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#define WD_CDEV_MAJOR 3
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static struct cdevsw id_cdevsw = {
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/* open */ idopen,
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/* close */ idclose,
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/* read */ physread,
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/* write */ physwrite,
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/* ioctl */ idioctl,
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/* poll */ nopoll,
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/* mmap */ nommap,
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/* strategy */ idstrategy,
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/* name */ "id",
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/* maj */ ID_CDEV_MAJOR,
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/* dump */ nodump,
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/* psize */ idsize,
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/* flags */ D_DISK,
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/* bmaj */ ID_BDEV_MAJOR
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};
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static struct cdevsw stolen_cdevsw;
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static devclass_t id_devclass;
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static device_method_t id_methods[] = {
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DEVMETHOD(device_probe, idprobe),
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DEVMETHOD(device_attach, idattach),
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{ 0, 0 }
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};
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static driver_t id_driver = {
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"id",
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id_methods,
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sizeof(struct id_softc)
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};
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static __inline struct id_softc *
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idgetsoftc(dev_t dev)
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{
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int unit;
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unit = dkunit(dev);
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return ((struct id_softc *)devclass_get_softc(id_devclass, unit));
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}
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static int
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idopen(dev_t dev, int flags, int fmt, struct proc *p)
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{
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struct id_softc *drv;
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struct disklabel label;
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int error;
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drv = idgetsoftc(dev);
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if (drv == NULL)
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return (ENXIO);
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/* XXX block against race where > 1 person is reading label? */
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bzero(&label, sizeof(label));
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label.d_type = DTYPE_SCSI; /* XXX should this be DTYPE_RAID? */
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/*
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strncpy(label.d_typename, ...
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strncpy(label.d_packname, ...
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*/
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label.d_secsize = drv->secsize;
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label.d_nsectors = drv->sectors;
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label.d_ntracks = drv->heads;
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label.d_ncylinders = drv->cylinders;
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label.d_secpercyl = drv->sectors * drv->heads;
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label.d_secperunit = drv->secperunit;
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/* Initialize slice tables. */
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error = dsopen(dev, fmt, 0, &drv->slices, &label);
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return (error);
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}
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static int
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idclose(dev_t dev, int flags, int fmt, struct proc *p)
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{
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struct id_softc *drv;
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drv = idgetsoftc(dev);
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if (drv == NULL)
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return (ENXIO);
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dsclose(dev, fmt, drv->slices);
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return (0);
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}
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static int
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idioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, struct proc *p)
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{
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struct id_softc *drv;
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int error;
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drv = idgetsoftc(dev);
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if (drv == NULL)
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return (ENXIO);
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error = dsioctl(dev, cmd, addr, flag, &drv->slices);
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if (error == ENOIOCTL)
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return (ENOTTY);
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return (error);
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}
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static int
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idsize(dev_t dev)
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{
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struct id_softc *drv;
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drv = idgetsoftc(dev);
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if (drv == NULL)
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return (ENXIO);
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return (dssize(dev, &drv->slices));
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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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idstrategy(struct buf *bp)
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{
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struct id_softc *drv;
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int s;
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drv = idgetsoftc(bp->b_dev);
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if (drv == NULL) {
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bp->b_error = EINVAL;
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goto bad;
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}
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if (dscheck(bp, drv->slices) <= 0)
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goto done;
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/*
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* software write protect check
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*/
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if (drv->flags & DRV_WRITEPROT && (bp->b_flags & B_READ) == 0) {
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bp->b_error = EROFS;
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goto bad;
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}
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/*
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* If it's a null transfer, return immediately
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*/
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if (bp->b_bcount == 0)
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goto done;
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bp->b_driver1 = drv;
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s = splbio();
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devstat_start_transaction(&drv->stats);
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ida_submit_buf(drv->controller, bp);
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splx(s);
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return;
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bad:
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bp->b_flags |= B_ERROR;
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done:
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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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bp->b_resid = bp->b_bcount;
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biodone(bp);
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return;
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}
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void
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id_intr(struct buf *bp)
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{
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struct id_softc *drv = (struct id_softc *)bp->b_driver1;
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if (bp->b_flags & B_ERROR)
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bp->b_error = EIO;
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else
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bp->b_resid = 0;
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devstat_end_transaction_buf(&drv->stats, bp);
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biodone(bp);
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}
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static void
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id_drvinit(void)
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{
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static int devsw_installed = 0;
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if (devsw_installed)
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return; /* XXX is this needed? */
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cdevsw_add(&id_cdevsw);
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stolen_cdevsw = id_cdevsw;
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stolen_cdevsw.d_maj = WD_CDEV_MAJOR;
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stolen_cdevsw.d_bmaj = WD_BDEV_MAJOR;
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cdevsw_add(&stolen_cdevsw);
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devsw_installed = 1;
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}
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static int
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idprobe(device_t dev)
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{
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device_set_desc(dev, "Compaq Logical Drive");
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return (0);
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}
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static int
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idattach(device_t dev)
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{
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struct ida_drive_info dinfo;
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struct id_softc *drv;
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device_t parent;
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int error;
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id_drvinit();
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drv = (struct id_softc *)device_get_softc(dev);
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parent = device_get_parent(dev);
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drv->controller = (struct ida_softc *)device_get_softc(parent);
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drv->unit = device_get_unit(dev);
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error = ida_command(drv->controller, CMD_GET_LOG_DRV_INFO,
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&dinfo, sizeof(dinfo), drv->unit, DMA_DATA_IN);
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if (error) {
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device_printf(dev, "CMD_GET_LOG_DRV_INFO failed\n");
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return (ENXIO);
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}
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drv->cylinders = dinfo.ncylinders;
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drv->heads = dinfo.nheads;
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drv->sectors = dinfo.nsectors;
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drv->secsize = dinfo.secsize;
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drv->secperunit = dinfo.secperunit;
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/* XXX
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* other initialization
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*/
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device_printf(dev, "%uMB (%u sectors), blocksize=%d\n",
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drv->secperunit / ((1024 * 1024) / drv->secsize),
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drv->secperunit, drv->secsize);
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devstat_add_entry(&drv->stats, "id", drv->unit, drv->secsize,
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DEVSTAT_NO_ORDERED_TAGS,
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DEVSTAT_TYPE_DIRECT | DEVSTAT_TYPE_IF_OTHER, DEVSTAT_PRIORITY_DA);
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return (0);
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}
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DRIVER_MODULE(id, ida, id_driver, id_devclass, 0, 0);
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