freebsd-dev/sys/dev/ida/ida_disk.c
2000-10-15 14:19:01 +00:00

278 lines
6.5 KiB
C

/*-
* Copyright (c) 1999,2000 Jonathan Lemon
* 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.
*
* $FreeBSD$
*/
/*
* Disk driver for Compaq SMART RAID adapters.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bio.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/devicestat.h>
#include <sys/disk.h>
#if NPCI > 0
#include <machine/bus_memio.h>
#endif
#include <machine/bus_pio.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <dev/ida/idareg.h>
#include <dev/ida/idavar.h>
/* prototypes */
static int idad_probe(device_t dev);
static int idad_attach(device_t dev);
static int idad_detach(device_t dev);
static d_open_t idad_open;
static d_close_t idad_close;
static d_strategy_t idad_strategy;
#define IDAD_BDEV_MAJOR 29
#define IDAD_CDEV_MAJOR 109
static struct cdevsw id_cdevsw = {
/* open */ idad_open,
/* close */ idad_close,
/* read */ physread,
/* write */ physwrite,
/* ioctl */ noioctl,
/* poll */ nopoll,
/* mmap */ nommap,
/* strategy */ idad_strategy,
/* name */ "idad",
/* maj */ IDAD_CDEV_MAJOR,
/* dump */ nodump,
/* psize */ nopsize,
/* flags */ D_DISK,
/* bmaj */ IDAD_BDEV_MAJOR
};
static devclass_t idad_devclass;
static struct cdevsw idaddisk_cdevsw;
static int disks_registered = 0;
static device_method_t idad_methods[] = {
DEVMETHOD(device_probe, idad_probe),
DEVMETHOD(device_attach, idad_attach),
DEVMETHOD(device_detach, idad_detach),
{ 0, 0 }
};
static driver_t idad_driver = {
"idad",
idad_methods,
sizeof(struct idad_softc)
};
DRIVER_MODULE(idad, ida, idad_driver, idad_devclass, 0, 0);
static __inline struct idad_softc *
idad_getsoftc(dev_t dev)
{
return ((struct idad_softc *)dev->si_drv1);
}
static int
idad_open(dev_t dev, int flags, int fmt, struct proc *p)
{
struct idad_softc *drv;
struct disklabel *label;
drv = idad_getsoftc(dev);
if (drv == NULL)
return (ENXIO);
label = &drv->disk.d_label;
bzero(label, sizeof(*label));
label->d_type = DTYPE_SCSI;
label->d_secsize = drv->secsize;
label->d_nsectors = drv->sectors;
label->d_ntracks = drv->heads;
label->d_ncylinders = drv->cylinders;
label->d_secpercyl = drv->sectors * drv->heads;
label->d_secperunit = drv->secperunit;
return (0);
}
static int
idad_close(dev_t dev, int flags, int fmt, struct proc *p)
{
struct idad_softc *drv;
drv = idad_getsoftc(dev);
if (drv == NULL)
return (ENXIO);
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
idad_strategy(struct bio *bp)
{
struct idad_softc *drv;
int s;
drv = idad_getsoftc(bp->bio_dev);
if (drv == NULL) {
bp->bio_error = EINVAL;
goto bad;
}
/*
* software write protect check
*/
if (drv->flags & DRV_WRITEPROT && (bp->bio_cmd == BIO_WRITE)) {
bp->bio_error = EROFS;
goto bad;
}
/*
* If it's a null transfer, return immediately
*/
if (bp->bio_bcount == 0)
goto done;
bp->bio_driver1 = drv;
s = splbio();
devstat_start_transaction(&drv->stats);
ida_submit_buf(drv->controller, bp);
splx(s);
return;
bad:
bp->bio_flags |= BIO_ERROR;
done:
/*
* Correctly set the buf to indicate a completed transfer
*/
bp->bio_resid = bp->bio_bcount;
biodone(bp);
return;
}
void
idad_intr(struct bio *bp)
{
struct idad_softc *drv = (struct idad_softc *)bp->bio_driver1;
if (bp->bio_flags & BIO_ERROR)
bp->bio_error = EIO;
else
bp->bio_resid = 0;
devstat_end_transaction_bio(&drv->stats, bp);
biodone(bp);
}
static int
idad_probe(device_t dev)
{
device_set_desc(dev, "Compaq Logical Drive");
return (0);
}
static int
idad_attach(device_t dev)
{
struct ida_drive_info dinfo;
struct idad_softc *drv;
device_t parent;
dev_t dsk;
int error;
drv = (struct idad_softc *)device_get_softc(dev);
parent = device_get_parent(dev);
drv->controller = (struct ida_softc *)device_get_softc(parent);
drv->unit = device_get_unit(dev);
drv->drive = drv->controller->num_drives;
drv->controller->num_drives++;
error = ida_command(drv->controller, CMD_GET_LOG_DRV_INFO,
&dinfo, sizeof(dinfo), drv->drive, DMA_DATA_IN);
if (error) {
device_printf(dev, "CMD_GET_LOG_DRV_INFO failed\n");
return (ENXIO);
}
drv->cylinders = dinfo.ncylinders;
drv->heads = dinfo.nheads;
drv->sectors = dinfo.nsectors;
drv->secsize = dinfo.secsize == 0 ? 512 : dinfo.secsize;
drv->secperunit = dinfo.secperunit;
/* XXX
* other initialization
*/
device_printf(dev, "%uMB (%u sectors), blocksize=%d\n",
drv->secperunit / ((1024 * 1024) / drv->secsize),
drv->secperunit, drv->secsize);
devstat_add_entry(&drv->stats, "idad", drv->unit, drv->secsize,
DEVSTAT_NO_ORDERED_TAGS,
DEVSTAT_TYPE_STORARRAY| DEVSTAT_TYPE_IF_OTHER,
DEVSTAT_PRIORITY_ARRAY);
dsk = disk_create(drv->unit, &drv->disk, 0,
&id_cdevsw, &idaddisk_cdevsw);
dsk->si_drv1 = drv;
dsk->si_iosize_max = DFLTPHYS; /* XXX guess? */
disks_registered++;
return (0);
}
static int
idad_detach(device_t dev)
{
struct idad_softc *drv;
drv = (struct idad_softc *)device_get_softc(dev);
devstat_remove_entry(&drv->stats);
if (--disks_registered == 0)
cdevsw_remove(&idaddisk_cdevsw);
return (0);
}