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/*-
* Copyright (c) 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#if __FreeBSD_version < 500000
# include <dev/twe/twe_compat.h>
#else
# include <sys/bio.h>
#endif
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/devicestat.h>
#include <sys/disk.h>
#include <machine/bus.h>
#include <machine/clock.h>
#include <sys/rman.h>
#include <dev/twe/twereg.h>
#include <dev/twe/twevar.h>
/*
* Interface to controller.
*/
static int twed_probe(device_t dev);
static int twed_attach(device_t dev);
static int twed_detach(device_t dev);
/*
* Interface to the device switch
*/
static d_open_t twed_open;
static d_close_t twed_close;
static d_strategy_t twed_strategy;
#define TWED_CDEV_MAJOR 147
static struct cdevsw twed_cdevsw = {
/* open */ twed_open,
/* close */ twed_close,
/* read */ physread,
/* write */ physwrite,
/* ioctl */ noioctl,
/* poll */ nopoll,
/* mmap */ nommap,
/* strategy */ twed_strategy,
/* name */ "twed",
/* maj */ TWED_CDEV_MAJOR,
/* dump */ nodump,
/* psize */ nopsize,
/* flags */ D_DISK,
/* bmaj */ -1
};
devclass_t twed_devclass;
static struct cdevsw tweddisk_cdevsw;
#ifdef FREEBSD_4
static int disks_registered = 0;
#endif
static device_method_t twed_methods[] = {
DEVMETHOD(device_probe, twed_probe),
DEVMETHOD(device_attach, twed_attach),
DEVMETHOD(device_detach, twed_detach),
{ 0, 0 }
};
static driver_t twed_driver = {
"twed",
twed_methods,
sizeof(struct twed_softc)
};
DRIVER_MODULE(twed, twe, twed_driver, twed_devclass, 0, 0);
/********************************************************************************
* Handle open from generic layer.
*
* Note that this is typically only called by the diskslice code, and not
* for opens on subdevices (eg. slices, partitions).
*/
static int
twed_open(dev_t dev, int flags, int fmt, struct proc *p)
{
struct twed_softc *sc = (struct twed_softc *)dev->si_drv1;
struct disklabel *label;
debug_called(4);
if (sc == NULL)
return (ENXIO);
/* check that the controller is up and running */
if (sc->twed_controller->twe_state & TWE_STATE_SHUTDOWN)
return(ENXIO);
/* build synthetic label */
label = &sc->twed_disk.d_label;
bzero(label, sizeof(*label));
label->d_type = DTYPE_ESDI;
label->d_secsize = TWE_BLOCK_SIZE;
label->d_nsectors = sc->twed_drive->td_sectors;
label->d_ntracks = sc->twed_drive->td_heads;
label->d_ncylinders = sc->twed_drive->td_cylinders;
label->d_secpercyl = sc->twed_drive->td_sectors * sc->twed_drive->td_heads;
label->d_secperunit = sc->twed_drive->td_size;
sc->twed_flags |= TWED_OPEN;
return (0);
}
/********************************************************************************
* Handle last close of the disk device.
*/
static int
twed_close(dev_t dev, int flags, int fmt, struct proc *p)
{
struct twed_softc *sc = (struct twed_softc *)dev->si_drv1;
debug_called(4);
if (sc == NULL)
return (ENXIO);
sc->twed_flags &= ~TWED_OPEN;
return (0);
}
/********************************************************************************
* Handle an I/O request.
*/
static void
twed_strategy(struct bio *bp)
{
struct twed_softc *sc = (struct twed_softc *)bp->bio_dev->si_drv1;
debug_called(4);
/* bogus disk? */
if (sc == NULL) {
bp->bio_flags |= BIO_ERROR;
bp->bio_error = EINVAL;
return;
}
/* do-nothing operation? */
if (bp->bio_bcount == 0) {
bp->bio_resid = bp->bio_bcount;
biodone(bp);
return;
}
/* perform accounting */
devstat_start_transaction(&sc->twed_stats);
/* pass the bio to the controller - it can work out who we are */
twe_submit_buf(sc->twed_controller, bp);
return;
}
/********************************************************************************
* Handle completion of an I/O request.
*/
void
twed_intr(void *data)
{
struct bio *bp = (struct bio *)data;
struct twed_softc *sc = (struct twed_softc *)bp->bio_dev->si_drv1;
debug_called(4);
/* check for error from controller code */
if (bp->bio_flags & BIO_ERROR) {
bp->bio_error = EIO;
} else {
bp->bio_resid = 0;
}
devstat_end_transaction_bio(&sc->twed_stats, bp);
biodone(bp);
}
/********************************************************************************
* Stub to provide device identification when probed.
*/
static int
twed_probe(device_t dev)
{
debug_called(4);
device_set_desc(dev, "3ware RAID unit");
return (0);
}
/********************************************************************************
* Attach a unit to the controller.
*/
static int
twed_attach(device_t dev)
{
struct twed_softc *sc = (struct twed_softc *)device_get_softc(dev);
device_t parent;
dev_t dsk;
debug_called(4);
/* initialise our softc */
parent = device_get_parent(dev);
sc->twed_controller = (struct twe_softc *)device_get_softc(parent);
sc->twed_drive = device_get_ivars(dev);
sc->twed_dev = dev;
/* report the drive */
device_printf(dev, "%uMB (%u sectors)\n",
sc->twed_drive->td_size / ((1024 * 1024) / TWE_BLOCK_SIZE),
sc->twed_drive->td_size);
devstat_add_entry(&sc->twed_stats, "twed", device_get_unit(dev), TWE_BLOCK_SIZE,
DEVSTAT_NO_ORDERED_TAGS,
DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER,
DEVSTAT_PRIORITY_ARRAY);
/* attach a generic disk device to ourselves */
dsk = disk_create(device_get_unit(dev), &sc->twed_disk, 0, &twed_cdevsw, &tweddisk_cdevsw);
dsk->si_drv1 = sc;
sc->twed_dev_t = dsk;
#ifdef FREEBSD_4
disks_registered++;
#endif
/* set the maximum I/O size to the theoretical maximum allowed by the S/G list size */
dsk->si_iosize_max = (TWE_MAX_SGL_LENGTH - 1) * PAGE_SIZE;
return (0);
}
/********************************************************************************
* Disconnect ourselves from the system.
*/
static int
twed_detach(device_t dev)
{
struct twed_softc *sc = (struct twed_softc *)device_get_softc(dev);
debug_called(4);
if (sc->twed_flags & TWED_OPEN)
return(EBUSY);
devstat_remove_entry(&sc->twed_stats);
#ifdef FREEBSD_4
if (--disks_registered == 0)
cdevsw_remove(&tweddisk_cdevsw);
#else
disk_destroy(sc->twed_dev_t);
#endif
return(0);
}
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