9626b608de
<sys/bio.h>. <sys/bio.h> is now a prerequisite for <sys/buf.h> but it shall not be made a nested include according to bdes teachings on the subject of nested includes. Diskdrivers and similar stuff below specfs::strategy() should no longer need to include <sys/buf.> unless they need caching of data. Still a few bogus uses of struct buf to track down. Repocopy by: peter
312 lines
7.7 KiB
C
312 lines
7.7 KiB
C
/*-
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* Copyright (c) 1999 Jonathan Lemon
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* Copyright (c) 1999 Michael Smith
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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 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 <sys/bio.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/disk.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/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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#if 0
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#define debug(fmt, args...) printf("%s: " fmt "\n", __FUNCTION__ , ##args)
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#else
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#define debug(fmt, args...)
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#endif
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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 d_open_t amrd_open;
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static d_close_t amrd_close;
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static d_strategy_t amrd_strategy;
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static d_ioctl_t amrd_ioctl;
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#define AMRD_BDEV_MAJOR 35
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#define AMRD_CDEV_MAJOR 133
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static struct cdevsw amrd_cdevsw = {
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/* open */ amrd_open,
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/* close */ amrd_close,
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/* read */ physread,
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/* write */ physwrite,
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/* ioctl */ amrd_ioctl,
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/* poll */ nopoll,
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/* mmap */ nommap,
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/* strategy */ amrd_strategy,
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/* name */ "amrd",
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/* maj */ AMRD_CDEV_MAJOR,
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/* dump */ nodump,
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/* psize */ nopsize,
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/* flags */ D_DISK,
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/* bmaj */ AMRD_BDEV_MAJOR
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};
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static devclass_t amrd_devclass;
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static struct cdevsw amrddisk_cdevsw;
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static int disks_registered = 0;
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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(dev_t dev, int flags, int fmt, struct proc *p)
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{
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struct amrd_softc *sc = (struct amrd_softc *)dev->si_drv1;
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struct disklabel *label;
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debug("called");
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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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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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sc->amrd_flags |= AMRD_OPEN;
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return (0);
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}
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static int
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amrd_close(dev_t dev, int flags, int fmt, struct proc *p)
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{
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struct amrd_softc *sc = (struct amrd_softc *)dev->si_drv1;
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debug("called");
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if (sc == NULL)
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return (ENXIO);
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sc->amrd_flags &= ~AMRD_OPEN;
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return (0);
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}
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static int
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amrd_ioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, struct proc *p)
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{
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struct amrd_softc *sc = (struct amrd_softc *)dev->si_drv1;
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int error;
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debug("called");
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if (sc == NULL)
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return (ENXIO);
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if ((error = amr_submit_ioctl(sc->amrd_controller, sc->amrd_drive, cmd, addr, flag, p)) != ENOIOCTL) {
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debug("amr_submit_ioctl returned %d\n", error);
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return(error);
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}
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return (ENOTTY);
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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 *bp)
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{
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struct amrd_softc *sc = (struct amrd_softc *)bp->bio_dev->si_drv1;
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debug("called to %s %d bytes at b_blkno 0x%x b_pblkno 0x%x",
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(bp->b_flags & B_READ) ? "read" : "write", bp->bio_bcount, bp->bio_blkno, bp->bio_pblkno);
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/* bogus disk? */
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if (sc == NULL) {
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bp->bio_error = EINVAL;
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goto bad;
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}
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#if 0
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/* XXX may only be temporarily offline - sleep? */
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if (sc->amrd_drive->ld_state == AMR_SYSD_OFFLINE) {
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bp->bio_error = ENXIO;
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goto bad;
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}
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#endif
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/* do-nothing operation */
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if (bp->bio_bcount == 0)
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goto done;
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devstat_start_transaction(&sc->amrd_stats);
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amr_submit_buf(sc->amrd_controller, bp);
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return;
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bad:
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bp->bio_flags |= BIO_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->bio_resid = bp->bio_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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amrd_intr(void *data)
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{
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struct bio *bp = (struct bio *)data;
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struct amrd_softc *sc = (struct amrd_softc *)bp->bio_dev->si_drv1;
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debug("called");
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if (bp->bio_flags & BIO_ERROR) {
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bp->bio_error = EIO;
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debug("i/o error\n");
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} else {
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#if 0
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int i;
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for (i = 0; i < 512; i += 16)
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debug(" %04x %16D", i, bp->bio_data + i, " ");
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#endif
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bp->bio_resid = 0;
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}
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devstat_end_transaction_bio(&sc->amrd_stats, bp);
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biodone(bp);
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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");
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device_set_desc(dev, "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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char *state;
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debug("called");
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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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switch(sc->amrd_drive->al_state) {
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case AMRD_OFFLINE:
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state = "offline";
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break;
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case AMRD_DEGRADED:
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state = "degraded";
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break;
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case AMRD_OPTIMAL:
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state = "optimal";
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break;
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case AMRD_DELETED:
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state = "deleted";
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break;
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default:
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state = "unknown state";
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}
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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 & 0xf, state);
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devstat_add_entry(&sc->amrd_stats, "amrd", sc->amrd_unit, AMR_BLKSIZE,
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DEVSTAT_NO_ORDERED_TAGS,
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DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER,
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DEVSTAT_PRIORITY_ARRAY);
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sc->amrd_dev_t = disk_create(sc->amrd_unit, &sc->amrd_disk, 0, &amrd_cdevsw, &amrddisk_cdevsw);
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sc->amrd_dev_t->si_drv1 = sc;
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disks_registered++;
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/* set maximum I/O size */
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/* dsk->si_iosize_max = ??? */;
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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");
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devstat_remove_entry(&sc->amrd_stats);
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disk_destroy(sc->amrd_dev_t);
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return(0);
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}
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