freebsd-dev/sys/dev/mfi/mfi_disk.c
Scott Long 441f6d5dca - Add a command validator for use in debugging.
- Fix the locking protocol to eliminate races between normal I/O and AENs.
- Various small improvements and usability tweaks.

Sponsored by: IronPort
Portions Submitted by: Doug Ambrisko
2006-10-16 04:18:38 +00:00

260 lines
6.0 KiB
C

/*-
* Copyright (c) 2006 IronPort Systems
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_mfi.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/selinfo.h>
#include <sys/module.h>
#include <sys/malloc.h>
#include <sys/uio.h>
#include <sys/bio.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/disk.h>
#include <geom/geom_disk.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/md_var.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <dev/mfi/mfireg.h>
#include <dev/mfi/mfi_ioctl.h>
#include <dev/mfi/mfivar.h>
static int mfi_disk_probe(device_t dev);
static int mfi_disk_attach(device_t dev);
static int mfi_disk_detach(device_t dev);
static disk_open_t mfi_disk_open;
static disk_close_t mfi_disk_close;
static disk_strategy_t mfi_disk_strategy;
static dumper_t mfi_disk_dump;
static devclass_t mfi_disk_devclass;
struct mfi_disk {
device_t ld_dev;
int ld_id;
int ld_unit;
struct mfi_softc *ld_controller;
struct mfi_ld *ld_ld;
struct disk *ld_disk;
};
static device_method_t mfi_disk_methods[] = {
DEVMETHOD(device_probe, mfi_disk_probe),
DEVMETHOD(device_attach, mfi_disk_attach),
DEVMETHOD(device_detach, mfi_disk_detach),
{ 0, 0 }
};
static driver_t mfi_disk_driver = {
"mfid",
mfi_disk_methods,
sizeof(struct mfi_disk)
};
DRIVER_MODULE(mfid, mfi, mfi_disk_driver, mfi_disk_devclass, 0, 0);
static int
mfi_disk_probe(device_t dev)
{
return (0);
}
static int
mfi_disk_attach(device_t dev)
{
struct mfi_disk *sc;
struct mfi_ld *ld;
uint64_t sectors;
uint32_t secsize;
char *state;
sc = device_get_softc(dev);
ld = device_get_ivars(dev);
sc->ld_dev = dev;
sc->ld_id = ld->ld_id;
sc->ld_unit = device_get_unit(dev);
sc->ld_ld = device_get_ivars(dev);
sc->ld_controller = device_get_softc(device_get_parent(dev));
sectors = ld->ld_info->size;
secsize = MFI_SECTOR_LEN;
TAILQ_INSERT_TAIL(&sc->ld_controller->mfi_ld_tqh, ld, ld_link);
switch (ld->ld_info->ld_config.params.state) {
case MFI_LD_STATE_OFFLINE:
state = "offline";
break;
case MFI_LD_STATE_PARTIALLY_DEGRADED:
state = "partially degraded";
break;
case MFI_LD_STATE_DEGRADED:
state = "degraded";
break;
case MFI_LD_STATE_OPTIMAL:
state = "optimal";
break;
default:
state = "unknown";
break;
}
device_printf(dev, "%juMB (%ju sectors) RAID volume '%s' is %s\n",
sectors / (1024 * 1024 / secsize), sectors,
ld->ld_info->ld_config.properties.name,
state);
sc->ld_disk = disk_alloc();
sc->ld_disk->d_drv1 = sc;
sc->ld_disk->d_maxsize = sc->ld_controller->mfi_max_io * secsize;
sc->ld_disk->d_name = "mfid";
sc->ld_disk->d_open = mfi_disk_open;
sc->ld_disk->d_close = mfi_disk_close;
sc->ld_disk->d_strategy = mfi_disk_strategy;
sc->ld_disk->d_dump = mfi_disk_dump;
sc->ld_disk->d_unit = sc->ld_unit;
sc->ld_disk->d_sectorsize = secsize;
sc->ld_disk->d_mediasize = sectors * secsize;
if (sc->ld_disk->d_mediasize >= (1 * 1024 * 1024)) {
sc->ld_disk->d_fwheads = 255;
sc->ld_disk->d_fwsectors = 63;
} else {
sc->ld_disk->d_fwheads = 64;
sc->ld_disk->d_fwsectors = 32;
}
disk_create(sc->ld_disk, DISK_VERSION);
return (0);
}
static int
mfi_disk_detach(device_t dev)
{
struct mfi_disk *sc;
sc = device_get_softc(dev);
if (sc->ld_disk->d_flags & DISKFLAG_OPEN)
return (EBUSY);
disk_destroy(sc->ld_disk);
return (0);
}
static int
mfi_disk_open(struct disk *dp)
{
return (0);
}
static int
mfi_disk_close(struct disk *dp)
{
return (0);
}
static void
mfi_disk_strategy(struct bio *bio)
{
struct mfi_disk *sc;
struct mfi_softc *controller;
sc = bio->bio_disk->d_drv1;
if (sc == NULL) {
bio->bio_error = EINVAL;
bio->bio_flags |= BIO_ERROR;
bio->bio_resid = bio->bio_bcount;
biodone(bio);
return;
}
controller = sc->ld_controller;
bio->bio_driver1 = (void *)(uintptr_t)sc->ld_id;
mtx_lock(&controller->mfi_io_lock);
mfi_enqueue_bio(controller, bio);
mfi_startio(controller);
mtx_unlock(&controller->mfi_io_lock);
return;
}
void
mfi_disk_complete(struct bio *bio)
{
struct mfi_disk *sc;
struct mfi_frame_header *hdr;
sc = bio->bio_disk->d_drv1;
hdr = bio->bio_driver1;
if (bio->bio_flags & BIO_ERROR) {
if (bio->bio_error == 0)
bio->bio_error = EIO;
disk_err(bio, "hard error", -1, 1);
} else {
bio->bio_resid = 0;
}
biodone(bio);
}
static int
mfi_disk_dump(void *arg, void *virt, vm_offset_t phys, off_t offset, size_t len)
{
struct mfi_disk *sc;
struct mfi_softc *parent_sc;
struct disk *dp;
int error;
dp = arg;
sc = dp->d_drv1;
parent_sc = sc->ld_controller;
if (len > 0) {
if ((error = mfi_dump_blocks(parent_sc, sc->ld_id, offset /
MFI_SECTOR_LEN, virt, len)) != 0)
return (error);
} else {
/* mfi_sync_cache(parent_sc, sc->ld_id); */
}
return (0);
}