File:  [DragonFly] / src / sys / dev / raid / amr / amr_disk.c
Revision 1.8: download - view: text, annotated - select for diffs
Thu May 13 23:49:18 2004 UTC (9 years, 11 months ago) by dillon
Branches: MAIN
CVS tags: HEAD
device switch 1/many: Remove d_autoq, add d_clone (where d_autoq was).

d_autoq was used to allow the device port dispatch to mix old-style synchronous
calls with new style messaging calls within a particular device.  It was never
used for that purpose.

d_clone will be more fully implemented as work continues.  We are going to
install d_port in the dev_t (struct specinfo) structure itself and d_clone
will be needed to allow devices to 'revector' the port on a minor-number
by minor-number basis, in particular allowing minor numbers to be directly
dispatched to distinct threads.  This is something we will be needing later
on.

/*-
 * 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 1.5.2.5 2002/12/20 15:12:04 emoore Exp $
 * $DragonFly: src/sys/dev/raid/amr/amr_disk.c,v 1.8 2004/05/13 23:49:18 dillon Exp $
 */

/*
 * Disk driver for AMI MegaRaid controllers
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>

#include "amr_compat.h"
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/devicestat.h>
#include <sys/disk.h>

#include <vm/vm.h>
#include <vm/pmap.h>

#include <machine/bus.h>
#include <machine/md_var.h>
#include <sys/rman.h>

#include "amrio.h"
#include "amrreg.h"
#include "amrvar.h"
#include "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_close_t	amrd_close;
static	d_strategy_t	amrd_strategy;
static	d_ioctl_t	amrd_ioctl;
static	d_dump_t	amrd_dump;

#define AMRD_CDEV_MAJOR	133

static struct cdevsw amrd_cdevsw = {
		/* name */ 	"amrd",
		/* maj */	AMRD_CDEV_MAJOR,
		/* flags */	D_DISK,
		/* port */      NULL,
		/* clone */	NULL,

		/* open */	amrd_open,
		/* close */	amrd_close,
		/* read */	physread,
		/* write */	physwrite,
		/* ioctl */	amrd_ioctl,
		/* poll */	nopoll,
		/* mmap */	nommap,
		/* strategy */	amrd_strategy,
		/* dump */	amrd_dump,
		/* psize */ 	nopsize
};

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),
    { 0, 0 }
};

static driver_t amrd_driver = {
    "amrd",
    amrd_methods,
    sizeof(struct amrd_softc)
};

DRIVER_MODULE(amrd, amr, amrd_driver, amrd_devclass, 0, 0);

static int
amrd_open(dev_t dev, int flags, int fmt, d_thread_t *td)
{
    struct amrd_softc	*sc = (struct amrd_softc *)dev->si_drv1;
#if defined(__DragonFly__) || __FreeBSD_version < 500000		/* old buf style */
    struct disklabel    *label;
#endif

    debug_called(1);

    if (sc == NULL)
	return (ENXIO);

    /* controller not active? */
    if (sc->amrd_controller->amr_state & AMR_STATE_SHUTDOWN)
	return(ENXIO);

#if defined(__DragonFly__) || __FreeBSD_version < 500000		/* old buf style */
    label = &sc->amrd_disk.d_label;
    bzero(label, sizeof(*label));
    label->d_type       = DTYPE_SCSI;
    label->d_secsize    = AMR_BLKSIZE;
    label->d_nsectors   = sc->amrd_drive->al_sectors;
    label->d_ntracks    = sc->amrd_drive->al_heads;
    label->d_ncylinders = sc->amrd_drive->al_cylinders;
    label->d_secpercyl  = sc->amrd_drive->al_sectors * sc->amrd_drive->al_heads;
    label->d_secperunit = sc->amrd_drive->al_size;
#else
    sc->amrd_disk.d_sectorsize = AMR_BLKSIZE;
    sc->amrd_disk.d_mediasize = (off_t)sc->amrd_drive->al_size * AMR_BLKSIZE;
    sc->amrd_disk.d_fwsectors = sc->amrd_drive->al_sectors;
    sc->amrd_disk.d_fwheads = sc->amrd_drive->al_heads;
#endif

    sc->amrd_flags |= AMRD_OPEN;
    return (0);
}

static int
amrd_close(dev_t dev, int flags, int fmt, d_thread_t *td)
{
    struct amrd_softc	*sc = (struct amrd_softc *)dev->si_drv1;

    debug_called(1);

    if (sc == NULL)
	return (ENXIO);
    sc->amrd_flags &= ~AMRD_OPEN;
    return (0);
}

static int
amrd_ioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, d_thread_t *td)
{

    return (ENOTTY);
}


/********************************************************************************
 * System crashdump support
 */
int
amrd_dump(dev_t dev)
{
    
    struct amrd_softc	*amrd_sc = (struct amrd_softc *)dev->si_drv1;
    struct amr_softc	*amr_sc;
    u_int		count, blkno, secsize;
    vm_paddr_t		addr = 0;
    long		blkcnt;
    int			dumppages = MAXDUMPPGS;
    int			error = 0;
    int			driveno;
    int			i;

    debug_called(1);

    if ((error = disk_dumpcheck(dev, &count, &blkno, &secsize)))
        return(error);

    amr_sc  = (struct amr_softc *)amrd_sc->amrd_controller;

    if (!amrd_sc || !amr_sc)
	return(ENXIO);

    blkcnt = howmany(PAGE_SIZE, secsize);

    driveno = amrd_sc->amrd_drive - amr_sc->amr_drive;

    while (count > 0) {
    	caddr_t	va = NULL;

	if ((count / blkcnt) < dumppages)
	    dumppages = count / blkcnt;

	for (i = 0; i < dumppages; ++i) {
	    vm_paddr_t a = addr + (i * PAGE_SIZE);
	    if (is_physical_memory(a))
		va = pmap_kenter_temporary(trunc_page(a), i);
	    else
		va = pmap_kenter_temporary(trunc_page(0), i);
	}

	if ((error = amr_dump_blocks(amr_sc, driveno, blkno, (void *)va,
				      (PAGE_SIZE * dumppages) / AMR_BLKSIZE)) != 0)
	    	return(error);

	if (dumpstatus(addr, (off_t)count * DEV_BSIZE) < 0)
	    return(EINTR);

	blkno += blkcnt * dumppages;
	count -= blkcnt * dumppages;
	addr += PAGE_SIZE * dumppages;
    }
    return (0);
}
/*
 * 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 void
amrd_strategy(struct bio *bio)
{
    struct amrd_softc	*sc = (struct amrd_softc *)bio->bio_dev->si_drv1;

    /* bogus disk? */
    if (sc == NULL) {
	bio->bio_error = EINVAL;
	goto bad;
    }

    devstat_start_transaction(&sc->amrd_stats);
    amr_submit_bio(sc->amrd_controller, bio);
    return;

 bad:
    bio->bio_flags |= BIO_ERROR;

    /*
     * Correctly set the buf to indicate a completed transfer
     */
    bio->bio_resid = bio->bio_bcount;
    biodone(bio);
    return;
}

void
amrd_intr(void *data)
{
    struct bio *bio = (struct bio *)data;
    struct amrd_softc *sc = (struct amrd_softc *)bio->bio_dev->si_drv1;

    debug_called(2);

    if (bio->bio_flags & BIO_ERROR) {
	bio->bio_error = EIO;
	debug(1, "i/o error\n");
    } else {
	bio->bio_resid = 0;
    }

    AMR_BIO_FINISH(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;
    
    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, 0, &amrd_cdevsw);
    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;

    return (0);
}

static int
amrd_detach(device_t dev)
{
    struct amrd_softc *sc = (struct amrd_softc *)device_get_softc(dev);

    debug_called(1);

    if (sc->amrd_flags & AMRD_OPEN)
	return(EBUSY);

    devstat_remove_entry(&sc->amrd_stats);
    disk_destroy(&sc->amrd_disk);
    return(0);
}