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freebsd/sys/dev/ida/ida_disk.c
Julian Elischer b40ce4165d KSE Milestone 2
Note ALL MODULES MUST BE RECOMPILED
make the kernel aware that there are smaller units of scheduling than the
process. (but only allow one thread per process at this time).
This is functionally equivalent to teh previousl -current except
that there is a thread associated with each process.

Sorry john! (your next MFC will be a doosie!)

Reviewed by: peter@freebsd.org, dillon@freebsd.org

X-MFC after:    ha ha ha ha
2001-09-12 08:38:13 +00:00

322 lines
7.4 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/cons.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 <vm/vm.h>
#include <vm/pmap.h>
#include <machine/md_var.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;
static d_dump_t idad_dump;
#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 */ idad_dump,
/* psize */ nopsize,
/* flags */ D_DISK,
};
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 thread *td)
{
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 thread *td)
{
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;
}
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;
/*
* Correctly set the buf to indicate a completed transfer
*/
bp->bio_resid = bp->bio_bcount;
biodone(bp);
return;
}
static int
idad_dump(dev_t dev)
{
struct idad_softc *drv;
u_int count, blkno, secsize;
long blkcnt;
int i, error, dumppages;
caddr_t va;
vm_offset_t addr, a;
if ((error = disk_dumpcheck(dev, &count, &blkno, &secsize)))
return (error);
drv = idad_getsoftc(dev);
if (drv == NULL)
return (ENXIO);
addr = 0;
blkcnt = howmany(PAGE_SIZE, secsize);
while (count > 0) {
va = NULL;
dumppages = imin(count / blkcnt, MAXDUMPPGS);
for (i = 0; i < dumppages; i++) {
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);
}
error = ida_command(drv->controller, CMD_WRITE, va,
PAGE_SIZE * dumppages, drv->drive, blkno, DMA_DATA_OUT);
if (error)
return (error);
if (dumpstatus(addr, (long)(count * DEV_BSIZE)) < 0)
return (EINTR);
blkno += blkcnt * dumppages;
count -= blkcnt * dumppages;
addr += PAGE_SIZE * dumppages;
}
return (0);
}
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;
biofinish(bp, &drv->stats, 0);
}
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, 0, 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);
}