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-rw-r--r--sys/powerpc/mambo/mambo_disk.c277
1 files changed, 277 insertions, 0 deletions
diff --git a/sys/powerpc/mambo/mambo_disk.c b/sys/powerpc/mambo/mambo_disk.c
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index 0000000..6077d35
--- /dev/null
+++ b/sys/powerpc/mambo/mambo_disk.c
@@ -0,0 +1,277 @@
+/*-
+ * Copyright (c) 2008 Nathan Whitehorn. 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 ``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 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/systm.h>
+#include <sys/bio.h>
+#include <sys/bus.h>
+#include <sys/conf.h>
+#include <sys/kernel.h>
+#include <sys/kthread.h>
+#include <sys/lock.h>
+#include <sys/malloc.h>
+#include <sys/module.h>
+#include <sys/mutex.h>
+#include <geom/geom_disk.h>
+
+#include <powerpc/mambo/mambocall.h>
+
+struct mambodisk_softc {
+ device_t dev;
+ struct mtx sc_mtx;
+ struct disk *disk;
+ struct proc *p;
+ struct bio_queue_head bio_queue;
+ int running;
+ int maxblocks;
+};
+
+#define MAMBO_DISK_READ 116
+#define MAMBO_DISK_WRITE 117
+#define MAMBO_DISK_INFO 118
+
+#define MAMBO_INFO_STATUS 1
+#define MAMBO_INFO_BLKSZ 2
+#define MAMBO_INFO_DEVSZ 3
+
+/* bus entry points */
+static void mambodisk_identify(driver_t *driver, device_t parent);
+static int mambodisk_probe(device_t dev);
+static int mambodisk_attach(device_t dev);
+
+/* disk routines */
+static int mambodisk_open(struct disk *dp);
+static int mambodisk_close(struct disk *dp);
+static void mambodisk_strategy(struct bio *bp);
+static void mambodisk_task(void *arg);
+
+#define MBODISK_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
+#define MBODISK_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
+#define MBODISK_LOCK_INIT(_sc) \
+ mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->dev), \
+ "mambodisk", MTX_DEF)
+#define MBODISK_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx);
+#define MBODISK_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED);
+#define MBODISK_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED);
+
+static void
+mambodisk_identify(driver_t *driver, device_t parent)
+{
+ int i = 0;
+
+ for (i = 0; mambocall(MAMBO_DISK_INFO,MAMBO_INFO_DEVSZ,i) > 0; i++)
+ BUS_ADD_CHILD(parent,0,"mambodisk",i);
+}
+
+static int
+mambodisk_probe(device_t dev)
+{
+ device_set_desc(dev, "Mambo Simulated Block Device");
+ return (0);
+}
+
+static int
+mambodisk_attach(device_t dev)
+{
+ struct mambodisk_softc *sc;
+ struct disk *d;
+ intmax_t mb;
+ char unit;
+
+ sc = device_get_softc(dev);
+ sc->dev = dev;
+ MBODISK_LOCK_INIT(sc);
+
+ d = sc->disk = disk_alloc();
+ d->d_open = mambodisk_open;
+ d->d_close = mambodisk_close;
+ d->d_strategy = mambodisk_strategy;
+ d->d_name = "mambodisk";
+ d->d_drv1 = sc;
+ d->d_maxsize = MAXPHYS; /* Maybe ask bridge? */
+
+ d->d_sectorsize = 512;
+ sc->maxblocks = mambocall(MAMBO_DISK_INFO,MAMBO_INFO_BLKSZ,d->d_unit)
+ / 512;
+
+ d->d_unit = device_get_unit(dev);
+ d->d_mediasize = mambocall(MAMBO_DISK_INFO,MAMBO_INFO_DEVSZ,d->d_unit)
+ * 1024ULL; /* Mambo gives size in KB */
+
+ mb = d->d_mediasize >> 20; /* 1MiB == 1 << 20 */
+ unit = 'M';
+ if (mb >= 10240) { /* 1GiB = 1024 MiB */
+ unit = 'G';
+ mb /= 1024;
+ }
+ device_printf(dev, "%ju%cB, %d byte sectors\n", mb, unit,
+ d->d_sectorsize);
+ disk_create(d, DISK_VERSION);
+ bioq_init(&sc->bio_queue);
+
+ sc->running = 1;
+ kproc_create(&mambodisk_task, sc, &sc->p, 0, 0, "task: mambo hd");
+
+ return (0);
+}
+
+static int
+mambodisk_detach(device_t dev)
+{
+ struct mambodisk_softc *sc = device_get_softc(dev);
+
+ /* kill thread */
+ MBODISK_LOCK(sc);
+ sc->running = 0;
+ wakeup(sc);
+ MBODISK_UNLOCK(sc);
+
+ /* wait for thread to finish. XXX probably want timeout. -sorbo */
+ MBODISK_LOCK(sc);
+ while (sc->running != -1)
+ msleep(sc, &sc->sc_mtx, PRIBIO, "detach", 0);
+ MBODISK_UNLOCK(sc);
+
+ /* kill disk */
+ disk_destroy(sc->disk);
+ /* XXX destroy anything in queue */
+
+ MBODISK_LOCK_DESTROY(sc);
+
+ return (0);
+}
+
+static int
+mambodisk_open(struct disk *dp)
+{
+ return (0);
+}
+
+static int
+mambodisk_close(struct disk *dp)
+{
+ return (0);
+}
+
+static void
+mambodisk_strategy(struct bio *bp)
+{
+ struct mambodisk_softc *sc;
+
+ sc = (struct mambodisk_softc *)bp->bio_disk->d_drv1;
+ MBODISK_LOCK(sc);
+ bioq_disksort(&sc->bio_queue, bp);
+ wakeup(sc);
+ MBODISK_UNLOCK(sc);
+}
+
+static void
+mambodisk_task(void *arg)
+{
+ struct mambodisk_softc *sc = (struct mambodisk_softc*)arg;
+ struct bio *bp;
+ size_t sz;
+ int result;
+ daddr_t block, end;
+ device_t dev;
+ u_long unit;
+
+ dev = sc->dev;
+ unit = device_get_unit(dev);
+
+ while (sc->running) {
+ MBODISK_LOCK(sc);
+ do {
+ bp = bioq_first(&sc->bio_queue);
+ if (bp == NULL)
+ msleep(sc, &sc->sc_mtx, PRIBIO, "jobqueue", 0);
+ } while (bp == NULL && sc->running);
+ if (bp)
+ bioq_remove(&sc->bio_queue, bp);
+ MBODISK_UNLOCK(sc);
+ if (!sc->running)
+ break;
+ sz = sc->disk->d_sectorsize;
+ end = bp->bio_pblkno + (bp->bio_bcount / sz);
+ for (block = bp->bio_pblkno; block < end;) {
+ u_long numblocks;
+ char *vaddr = bp->bio_data +
+ (block - bp->bio_pblkno) * sz;
+
+ numblocks = end - block;
+ if (numblocks > sc->maxblocks)
+ numblocks = sc->maxblocks;
+
+ if (bp->bio_cmd == BIO_READ) {
+ result = mambocall(MAMBO_DISK_READ, vaddr,
+ (u_long)block, (numblocks << 16) | unit);
+ } else if (bp->bio_cmd == BIO_WRITE) {
+ result = mambocall(MAMBO_DISK_WRITE, vaddr,
+ (u_long)block, (numblocks << 16) | unit);
+ } else {
+ result = 1;
+ }
+
+ if (result)
+ break;
+
+ block += numblocks;
+ }
+ if (block < end) {
+ bp->bio_error = EIO;
+ bp->bio_resid = (end - block) * sz;
+ bp->bio_flags |= BIO_ERROR;
+ }
+ biodone(bp);
+ }
+
+ /* tell parent we're done */
+ MBODISK_LOCK(sc);
+ sc->running = -1;
+ wakeup(sc);
+ MBODISK_UNLOCK(sc);
+
+ kproc_exit(0);
+}
+
+static device_method_t mambodisk_methods[] = {
+ DEVMETHOD(device_identify, mambodisk_identify),
+ DEVMETHOD(device_probe, mambodisk_probe),
+ DEVMETHOD(device_attach, mambodisk_attach),
+ DEVMETHOD(device_detach, mambodisk_detach),
+ {0, 0},
+};
+
+static driver_t mambodisk_driver = {
+ "mambodisk",
+ mambodisk_methods,
+ sizeof(struct mambodisk_softc),
+};
+static devclass_t mambodisk_devclass;
+
+DRIVER_MODULE(mambodisk, mambo, mambodisk_driver, mambodisk_devclass, 0, 0);
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