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/*-
* Copyright (c) 2012 Robert N. M. Watson
* All rights reserved.
*
* This software was developed by SRI International and the University of
* Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
* ("CTSRD"), as part of the DARPA CRASH research programme.
*
* 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 <sys/param.h>
#include <sys/bus.h>
#include <sys/condvar.h>
#include <sys/conf.h>
#include <sys/bio.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/rman.h>
#include <sys/systm.h>
#include <sys/taskqueue.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <geom/geom_disk.h>
#include <dev/altera/sdcard/altera_sdcard.h>
static int
altera_sdcard_disk_dump(void *arg, void *virtual, vm_offset_t physical,
off_t offset, size_t length)
{
panic("%s: not yet", __func__);
}
static int
altera_sdcard_disk_ioctl(struct disk *disk, u_long cmd, void *data, int fflag,
struct thread *td)
{
/* XXXRW: more here? */
return (EINVAL);
}
static void
altera_sdcard_disk_strategy(struct bio *bp)
{
struct altera_sdcard_softc *sc;
/*
* Although the SD Card doesn't need sorting, we don't want to
* introduce barriers, so use bioq_disksort().
*/
sc = bp->bio_disk->d_drv1;
ALTERA_SDCARD_LOCK(sc);
switch (sc->as_state) {
case ALTERA_SDCARD_STATE_NOCARD:
device_printf(sc->as_dev, "%s: unexpected I/O on NOCARD",
__func__);
biofinish(bp, NULL, ENXIO);
break;
case ALTERA_SDCARD_STATE_BADCARD:
device_printf(sc->as_dev, "%s: unexpected I/O on BADCARD",
__func__);
biofinish(bp, NULL, ENXIO);
break;
case ALTERA_SDCARD_STATE_DETACHED:
device_printf(sc->as_dev, "%s: unexpected I/O on DETACHED",
__func__);
biofinish(bp, NULL, ENXIO);
case ALTERA_SDCARD_STATE_IDLE:
bioq_disksort(&sc->as_bioq, bp);
altera_sdcard_start(sc);
break;
case ALTERA_SDCARD_STATE_IO:
bioq_disksort(&sc->as_bioq, bp);
break;
default:
panic("%s: invalid state %d", __func__, sc->as_state);
}
ALTERA_SDCARD_UNLOCK(sc);
}
void
altera_sdcard_disk_insert(struct altera_sdcard_softc *sc)
{
struct disk *disk;
uint64_t size;
ALTERA_SDCARD_LOCK_ASSERT(sc);
/*
* Because the disk insertion routine occupies the driver instance's
* task queue thread, and the disk(9) instance isn't hooked up yet by
* definition, the only other source of events of concern is a thread
* initiating driver detach. That thread has to issue a detach
* request and await an ACK from the taskqueue thread. It is
* therefore safe to drop the lock here.
*/
ALTERA_SDCARD_UNLOCK(sc);
disk = disk_alloc();
disk->d_drv1 = sc;
disk->d_name = "altera_sdcard";
disk->d_unit = sc->as_unit;
disk->d_strategy = altera_sdcard_disk_strategy;
disk->d_dump = altera_sdcard_disk_dump;
disk->d_ioctl = altera_sdcard_disk_ioctl;
disk->d_sectorsize = ALTERA_SDCARD_SECTORSIZE;
disk->d_mediasize = sc->as_mediasize;
disk->d_maxsize = ALTERA_SDCARD_SECTORSIZE;
sc->as_disk = disk;
disk_create(disk, DISK_VERSION);
ALTERA_SDCARD_LOCK(sc);
/*
* Print a pretty-ish card insertion string. We could stand to
* decorate this further, e.g., with card vendor information.
*/
size = sc->as_mediasize / (1000 * 1000);
device_printf(sc->as_dev, "%juM SD Card inserted\n", (uintmax_t)size);
}
void
altera_sdcard_disk_remove(struct altera_sdcard_softc *sc)
{
struct disk *disk;
ALTERA_SDCARD_LOCK_ASSERT(sc);
KASSERT(sc->as_disk != NULL, ("%s: as_disk NULL", __func__));
/*
* sc->as_state will be updated by the caller.
*
* XXXRW: Is it OK to call disk_destroy() under the mutex, or should
* we be deferring that to the calling context once it is released?
*/
disk = sc->as_disk;
disk_gone(disk);
disk_destroy(disk);
sc->as_disk = NULL;
/*
* Cancel all outstanding I/O on the SD Card.
*/
if (sc->as_currentbio != NULL) {
device_printf(sc->as_dev, "%s: SD Card removed during I/O",
__func__);
biofinish(sc->as_currentbio, NULL, ENXIO);
sc->as_currentbio = NULL;
}
bioq_flush(&sc->as_bioq, NULL, ENXIO);
device_printf(sc->as_dev, "SD Card removed\n");
}
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