1 files changed, 702 insertions, 0 deletions

diff --git a/sys/powerpc/ps3/ps3disk.c b/sys/powerpc/ps3/ps3disk.c
new file mode 100644
index 0000000..3bab0f2
--- /dev/null
+++ b/sys/powerpc/ps3/ps3disk.c
@@ -0,0 +1,702 @@
+/*-
+ * Copyright (C) 2011 glevand (geoffrey.levand@mail.ru)
+ * 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/sysctl.h>
+#include <sys/disk.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 <vm/vm.h>
+#include <vm/pmap.h>
+
+#include <machine/pio.h>
+#include <machine/bus.h>
+#include <machine/platform.h>
+#include <machine/pmap.h>
+#include <machine/resource.h>
+#include <sys/bus.h>
+#include <sys/rman.h>
+
+#include <geom/geom_disk.h>
+
+#include "ps3bus.h"
+#include "ps3-hvcall.h"
+
+#define PS3DISK_LOCK_INIT(_sc)		\
+	mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->sc_dev), "ps3disk", MTX_DEF)
+#define PS3DISK_LOCK_DESTROY(_sc)	mtx_destroy(&_sc->sc_mtx);
+#define PS3DISK_LOCK(_sc)		mtx_lock(&(_sc)->sc_mtx)
+#define	PS3DISK_UNLOCK(_sc)		mtx_unlock(&(_sc)->sc_mtx)
+#define PS3DISK_ASSERT_LOCKED(_sc)	mtx_assert(&_sc->sc_mtx, MA_OWNED);
+#define PS3DISK_ASSERT_UNLOCKED(_sc)	mtx_assert(&_sc->sc_mtx, MA_NOTOWNED);
+
+#define LV1_STORAGE_ATA_HDDOUT 		0x23
+
+SYSCTL_NODE(_hw, OID_AUTO, ps3disk, CTLFLAG_RD, 0, "PS3 Disk driver parameters");
+
+#ifdef PS3DISK_DEBUG
+static int ps3disk_debug = 0;
+SYSCTL_INT(_hw_ps3disk, OID_AUTO, debug, CTLFLAG_RW, &ps3disk_debug,
+	0, "control debugging printfs");
+TUNABLE_INT("hw.ps3disk.debug", &ps3disk_debug);
+enum {
+	PS3DISK_DEBUG_INTR	= 0x00000001,
+	PS3DISK_DEBUG_TASK	= 0x00000002,
+	PS3DISK_DEBUG_READ	= 0x00000004,
+	PS3DISK_DEBUG_WRITE	= 0x00000008,
+	PS3DISK_DEBUG_FLUSH	= 0x00000010,
+	PS3DISK_DEBUG_ANY	= 0xffffffff
+};
+#define	DPRINTF(sc, m, fmt, ...)				\
+do {								\
+	if (sc->sc_debug & (m))					\
+		printf(fmt, __VA_ARGS__);			\
+} while (0)
+#else
+#define	DPRINTF(sc, m, fmt, ...)
+#endif
+
+struct ps3disk_region {
+	uint64_t r_id;
+	uint64_t r_start;
+	uint64_t r_size;
+	uint64_t r_flags;
+};
+
+struct ps3disk_softc {
+	device_t sc_dev;
+
+	struct mtx sc_mtx;
+
+	uint64_t sc_blksize;
+	uint64_t sc_nblocks;
+
+	uint64_t sc_nregs;
+	struct ps3disk_region *sc_reg;
+
+	int sc_irqid;
+	struct resource	*sc_irq;
+	void *sc_irqctx;
+
+	struct disk **sc_disk;
+
+	struct bio_queue_head sc_bioq;
+	struct bio_queue_head sc_deferredq;
+	struct proc *sc_task;	
+
+	bus_dma_tag_t sc_dmatag;
+
+	int sc_running;
+	int sc_debug;
+};
+
+static int ps3disk_open(struct disk *dp);
+static int ps3disk_close(struct disk *dp);
+static void ps3disk_strategy(struct bio *bp);
+
+static void ps3disk_task(void *arg);
+static void ps3disk_intr(void *arg);
+static int ps3disk_get_disk_geometry(struct ps3disk_softc *sc);
+static int ps3disk_enum_regions(struct ps3disk_softc *sc);
+static void ps3disk_transfer(void *arg, bus_dma_segment_t *segs, int nsegs,
+    int error);
+
+static void ps3disk_sysctlattach(struct ps3disk_softc *sc);
+
+static MALLOC_DEFINE(M_PS3DISK, "ps3disk", "PS3 Disk");
+
+static int
+ps3disk_probe(device_t dev)
+{
+	if (ps3bus_get_bustype(dev) != PS3_BUSTYPE_STORAGE ||
+	    ps3bus_get_devtype(dev) != PS3_DEVTYPE_DISK)
+		return (ENXIO);
+
+	device_set_desc(dev, "Playstation 3 Disk");
+
+	return (BUS_PROBE_SPECIFIC);
+}
+
+static int
+ps3disk_attach(device_t dev)
+{
+	struct ps3disk_softc *sc;
+	struct disk *d;
+	intmax_t mb;
+	uint64_t junk;
+	char unit;
+	int i, err;
+
+	sc = device_get_softc(dev);
+	sc->sc_dev = dev;
+
+	PS3DISK_LOCK_INIT(sc);
+
+	err = ps3disk_get_disk_geometry(sc);
+	if (err) {
+		device_printf(dev, "Could not get disk geometry\n");
+		err = ENXIO;
+		goto fail_destroy_lock;
+	}
+
+	device_printf(dev, "block size %lu total blocks %lu\n",
+	    sc->sc_blksize, sc->sc_nblocks);
+
+	err = ps3disk_enum_regions(sc);
+	if (err) {
+		device_printf(dev, "Could not enumerate disk regions\n");
+		err = ENXIO;
+		goto fail_destroy_lock;
+	}
+
+	device_printf(dev, "Found %lu regions\n", sc->sc_nregs);
+
+	if (!sc->sc_nregs) {
+		err = ENXIO;
+		goto fail_destroy_lock;
+	}
+
+	/* Setup interrupt handler */
+	sc->sc_irqid = 0;
+	sc->sc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->sc_irqid,
+	    RF_ACTIVE);
+	if (!sc->sc_irq) {
+		device_printf(dev, "Could not allocate IRQ\n");
+		err = ENXIO;
+		goto fail_free_regions;
+	}
+
+	err = bus_setup_intr(dev, sc->sc_irq,
+	    INTR_TYPE_BIO | INTR_MPSAFE | INTR_ENTROPY,
+	    NULL, ps3disk_intr, sc, &sc->sc_irqctx);
+	if (err) {
+		device_printf(dev, "Could not setup IRQ\n");
+		err = ENXIO;
+		goto fail_release_intr;
+	}
+
+	/* Setup DMA */
+	err = bus_dma_tag_create(bus_get_dma_tag(dev), 4096, 0,
+	    BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL,
+	    BUS_SPACE_UNRESTRICTED, 1, PAGE_SIZE, 0,
+	    busdma_lock_mutex, &sc->sc_mtx, &sc->sc_dmatag);
+	if (err) {
+		device_printf(dev, "Could not create DMA tag\n");
+		err = ENXIO;
+		goto fail_teardown_intr;
+	}
+
+	/* Setup disks */
+
+	sc->sc_disk = malloc(sc->sc_nregs * sizeof(struct disk *),
+	    M_PS3DISK, M_ZERO | M_WAITOK);
+	if (!sc->sc_disk) {
+		device_printf(dev, "Could not allocate disk(s)\n");
+		err = ENOMEM;
+		goto fail_teardown_intr;
+	}
+
+	for (i = 0; i < sc->sc_nregs; i++) {
+		struct ps3disk_region *rp = &sc->sc_reg[i];
+
+		d = sc->sc_disk[i] = disk_alloc();
+		d->d_open = ps3disk_open;
+		d->d_close = ps3disk_close;
+		d->d_strategy = ps3disk_strategy;
+		d->d_name = "ps3disk";
+		d->d_drv1 = sc;
+		d->d_maxsize = PAGE_SIZE;
+		d->d_sectorsize = sc->sc_blksize;
+		d->d_unit = i;
+		d->d_mediasize = sc->sc_reg[i].r_size * sc->sc_blksize;
+		d->d_flags |= DISKFLAG_CANFLUSHCACHE;
+
+		mb = d->d_mediasize >> 20;
+		unit = 'M';
+		if (mb >= 10240) {
+			unit = 'G';
+			mb /= 1024;
+		}
+
+		/* Test to see if we can read this region */
+		err = lv1_storage_read(ps3bus_get_device(dev), d->d_unit,
+		    0, 0, rp->r_flags, 0, &junk);
+		device_printf(dev, "region %d %ju%cB%s\n", i, mb, unit,
+		    (err == LV1_DENIED_BY_POLICY) ?  " (hypervisor protected)"
+		    : "");
+
+		if (err != LV1_DENIED_BY_POLICY)
+			disk_create(d, DISK_VERSION);
+	}
+	err = 0;
+
+	bioq_init(&sc->sc_bioq);
+	bioq_init(&sc->sc_deferredq);
+	kproc_create(&ps3disk_task, sc, &sc->sc_task, 0, 0, "ps3disk");
+
+	ps3disk_sysctlattach(sc);
+	sc->sc_running = 1;
+	return (0);
+
+fail_teardown_intr:
+	bus_teardown_intr(dev, sc->sc_irq, sc->sc_irqctx);
+fail_release_intr:
+	bus_release_resource(dev, SYS_RES_IRQ, sc->sc_irqid, sc->sc_irq);
+fail_free_regions:
+	free(sc->sc_reg, M_PS3DISK);
+fail_destroy_lock:
+	PS3DISK_LOCK_DESTROY(sc);
+	return (err);
+}
+
+static int
+ps3disk_detach(device_t dev)
+{
+	struct ps3disk_softc *sc = device_get_softc(dev);
+	int i;
+
+	for (i = 0; i < sc->sc_nregs; i++)
+		disk_destroy(sc->sc_disk[i]);
+
+	bus_dma_tag_destroy(sc->sc_dmatag);
+
+	bus_teardown_intr(dev, sc->sc_irq, sc->sc_irqctx);
+	bus_release_resource(dev, SYS_RES_IRQ, sc->sc_irqid, sc->sc_irq);
+
+	free(sc->sc_disk, M_PS3DISK);
+	free(sc->sc_reg, M_PS3DISK);
+
+	PS3DISK_LOCK_DESTROY(sc);
+
+	return (0);
+}
+
+static int
+ps3disk_open(struct disk *dp)
+{
+	return (0);
+}
+
+static int
+ps3disk_close(struct disk *dp)
+{
+	return (0);
+}
+
+/* Process deferred blocks */
+static void
+ps3disk_task(void *arg)
+{
+	struct ps3disk_softc *sc = (struct ps3disk_softc *) arg;
+	struct bio *bp;
+
+	
+	while (1) {
+		kproc_suspend_check(sc->sc_task);
+		tsleep(&sc->sc_deferredq, PRIBIO, "ps3disk", 10);
+
+		PS3DISK_LOCK(sc);
+		bp = bioq_takefirst(&sc->sc_deferredq);
+		PS3DISK_UNLOCK(sc);
+
+		if (bp == NULL)
+			continue;
+
+		if (bp->bio_driver1 != NULL) {
+			bus_dmamap_unload(sc->sc_dmatag, (bus_dmamap_t)
+			    bp->bio_driver1);
+			bus_dmamap_destroy(sc->sc_dmatag, (bus_dmamap_t)
+			    bp->bio_driver1);
+		}
+
+		ps3disk_strategy(bp);
+	}
+
+	kproc_exit(0);
+}
+
+static void
+ps3disk_strategy(struct bio *bp)
+{
+	struct ps3disk_softc *sc = (struct ps3disk_softc *)bp->bio_disk->d_drv1;
+	int err;
+
+	if (sc == NULL) {
+		bp->bio_flags |= BIO_ERROR;
+		bp->bio_error = EINVAL;
+		biodone(bp);
+		return;
+	}
+
+	PS3DISK_LOCK(sc);
+	bp->bio_resid = bp->bio_bcount;
+	bioq_insert_tail(&sc->sc_bioq, bp);
+
+	DPRINTF(sc, PS3DISK_DEBUG_TASK, "%s: bio_cmd 0x%02x\n",
+	    __func__, bp->bio_cmd);
+
+	err = 0;
+	if (bp->bio_cmd == BIO_FLUSH) {
+		bp->bio_driver1 = 0;
+		err = lv1_storage_send_device_command(
+		    ps3bus_get_device(sc->sc_dev), LV1_STORAGE_ATA_HDDOUT,
+		    0, 0, 0, 0, (uint64_t *)&bp->bio_driver2);
+		if (err == LV1_BUSY)
+			err = EAGAIN;
+	} else if (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE) {
+		if (bp->bio_bcount % sc->sc_blksize != 0) {
+			err = EINVAL;
+		} else {
+			bus_dmamap_create(sc->sc_dmatag, BUS_DMA_COHERENT,
+			    (bus_dmamap_t *)(&bp->bio_driver1));
+			err = bus_dmamap_load(sc->sc_dmatag,
+			    (bus_dmamap_t)(bp->bio_driver1), bp->bio_data,
+			    bp->bio_bcount, ps3disk_transfer, bp, 0);
+			if (err == EINPROGRESS)
+				err = 0;
+		}
+	} else {
+		err = EINVAL;
+	}
+
+	if (err == EAGAIN) {
+		bioq_remove(&sc->sc_bioq, bp);
+		bioq_insert_tail(&sc->sc_deferredq, bp);
+	} else if (err != 0) {
+		bp->bio_error = err;
+		bp->bio_flags |= BIO_ERROR;
+		bioq_remove(&sc->sc_bioq, bp);
+		disk_err(bp, "hard error", -1, 1);
+		biodone(bp);
+	}
+
+	PS3DISK_UNLOCK(sc);
+}
+
+static void
+ps3disk_intr(void *arg)
+{
+	struct ps3disk_softc *sc = (struct ps3disk_softc *) arg;
+	device_t dev = sc->sc_dev;
+	uint64_t devid = ps3bus_get_device(dev);
+	struct bio *bp;
+	uint64_t tag, status;
+
+	if (lv1_storage_get_async_status(devid, &tag, &status) != 0)
+		return;
+	
+	PS3DISK_LOCK(sc);
+
+	DPRINTF(sc, PS3DISK_DEBUG_INTR, "%s: tag 0x%016lx "
+	    "status 0x%016lx\n", __func__, tag, status);
+
+	/* Locate the matching request */
+	TAILQ_FOREACH(bp, &sc->sc_bioq.queue, bio_queue) {
+		if ((uint64_t)bp->bio_driver2 != tag)
+			continue;
+
+		if (status != 0) {
+			device_printf(sc->sc_dev, "%s error (%#lx)\n",
+			    (bp->bio_cmd == BIO_READ) ? "Read" : "Write",
+			    status);
+			bp->bio_error = EIO;
+			bp->bio_flags |= BIO_ERROR;
+		} else {
+			bp->bio_error = 0;
+			bp->bio_resid = 0;
+			bp->bio_flags |= BIO_DONE;
+		}
+
+		if (bp->bio_driver1 != NULL) {
+			if (bp->bio_cmd == BIO_READ)
+				bus_dmamap_sync(sc->sc_dmatag, (bus_dmamap_t)
+				    bp->bio_driver1, BUS_DMASYNC_POSTREAD);
+			bus_dmamap_unload(sc->sc_dmatag, (bus_dmamap_t)
+			    bp->bio_driver1);
+			bus_dmamap_destroy(sc->sc_dmatag, (bus_dmamap_t)
+			    bp->bio_driver1);
+		}
+
+		bioq_remove(&sc->sc_bioq, bp);
+		biodone(bp);
+		break;
+	}
+
+	if (bioq_first(&sc->sc_deferredq) != NULL)
+		wakeup(&sc->sc_deferredq);
+
+	PS3DISK_UNLOCK(sc);
+}
+
+static int
+ps3disk_get_disk_geometry(struct ps3disk_softc *sc)
+{
+	device_t dev = sc->sc_dev;
+	uint64_t bus_index = ps3bus_get_busidx(dev);
+	uint64_t dev_index = ps3bus_get_devidx(dev);
+	uint64_t junk;
+	int err;
+
+	err = lv1_get_repository_node_value(PS3_LPAR_ID_PME,
+	    (lv1_repository_string("bus") >> 32) | bus_index,
+	    lv1_repository_string("dev") | dev_index,
+	    lv1_repository_string("blk_size"), 0, &sc->sc_blksize, &junk);
+	if (err) {
+		device_printf(dev, "Could not get block size (0x%08x)\n", err);
+		return (ENXIO);
+	}
+
+	err = lv1_get_repository_node_value(PS3_LPAR_ID_PME,
+	    (lv1_repository_string("bus") >> 32) | bus_index,
+	    lv1_repository_string("dev") | dev_index,
+	    lv1_repository_string("n_blocks"), 0, &sc->sc_nblocks, &junk);
+	if (err) {
+		device_printf(dev, "Could not get total number of blocks "
+		    "(0x%08x)\n", err);
+		err = ENXIO;
+	}
+
+	return (err);
+}
+
+static int
+ps3disk_enum_regions(struct ps3disk_softc *sc)
+{
+	device_t dev = sc->sc_dev;
+	uint64_t bus_index = ps3bus_get_busidx(dev);
+	uint64_t dev_index = ps3bus_get_devidx(dev);
+	uint64_t junk;
+	int i, err;
+
+	/* Read number of regions */
+
+	err = lv1_get_repository_node_value(PS3_LPAR_ID_PME,
+	    (lv1_repository_string("bus") >> 32) | bus_index,
+	    lv1_repository_string("dev") | dev_index,
+	    lv1_repository_string("n_regs"), 0, &sc->sc_nregs, &junk);
+	if (err) {
+		device_printf(dev, "Could not get number of regions (0x%08x)\n",
+		    err);
+		err = ENXIO;
+		goto fail;
+	}
+
+	if (!sc->sc_nregs)
+		return 0;
+
+	sc->sc_reg = malloc(sc->sc_nregs * sizeof(struct ps3disk_region),
+	    M_PS3DISK, M_ZERO | M_WAITOK);
+	if (!sc->sc_reg) {
+		err = ENOMEM;
+		goto fail;
+	}
+
+	/* Setup regions */
+
+	for (i = 0; i < sc->sc_nregs; i++) {
+		err = lv1_get_repository_node_value(PS3_LPAR_ID_PME,
+		    (lv1_repository_string("bus") >> 32) | bus_index,
+		    lv1_repository_string("dev") | dev_index,
+		    lv1_repository_string("region") | i,
+		    lv1_repository_string("id"), &sc->sc_reg[i].r_id, &junk);
+		if (err) {
+			device_printf(dev, "Could not get region id (0x%08x)\n",
+			    err);
+			err = ENXIO;
+			goto fail;
+		}
+
+		err = lv1_get_repository_node_value(PS3_LPAR_ID_PME,
+		    (lv1_repository_string("bus") >> 32) | bus_index,
+		    lv1_repository_string("dev") | dev_index,
+		    lv1_repository_string("region") | i,
+		    lv1_repository_string("start"), &sc->sc_reg[i].r_start,
+		    &junk);
+		if (err) {
+			device_printf(dev, "Could not get region start "
+			    "(0x%08x)\n", err);
+			err = ENXIO;
+			goto fail;
+		}
+
+		err = lv1_get_repository_node_value(PS3_LPAR_ID_PME,
+		    (lv1_repository_string("bus") >> 32) | bus_index,
+		    lv1_repository_string("dev") | dev_index,
+		    lv1_repository_string("region") | i,
+		    lv1_repository_string("size"), &sc->sc_reg[i].r_size,
+		    &junk);
+		if (err) {
+			device_printf(dev, "Could not get region size "
+			    "(0x%08x)\n", err);
+			err = ENXIO;
+			goto fail;
+		}
+
+		if (i == 0)
+			sc->sc_reg[i].r_flags = 0x2;
+		else
+			sc->sc_reg[i].r_flags = 0;
+	}
+
+	return (0);
+
+fail:
+
+	sc->sc_nregs = 0;
+	if (sc->sc_reg)
+		free(sc->sc_reg, M_PS3DISK);
+
+	return (err);
+}
+
+static void
+ps3disk_transfer(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
+{
+	struct bio *bp = (struct bio *)(arg);
+	struct ps3disk_softc *sc = (struct ps3disk_softc *)bp->bio_disk->d_drv1;
+	struct ps3disk_region *rp = &sc->sc_reg[bp->bio_disk->d_unit];
+	uint64_t devid = ps3bus_get_device(sc->sc_dev);
+	uint64_t block;
+	int i, err;
+
+	/* Locks already held by busdma */
+	PS3DISK_ASSERT_LOCKED(sc);
+
+	if (error) {
+		bp->bio_error = error;
+		bp->bio_flags |= BIO_ERROR;
+		bioq_remove(&sc->sc_bioq, bp);
+		biodone(bp);
+		return;
+	}
+
+	block = bp->bio_pblkno;
+	for (i = 0; i < nsegs; i++) {
+		KASSERT((segs[i].ds_len % sc->sc_blksize) == 0,
+		    ("DMA fragments not blocksize multiples"));
+
+		if (bp->bio_cmd == BIO_READ) {
+			err = lv1_storage_read(devid, rp->r_id,
+			    block, segs[i].ds_len/sc->sc_blksize,
+			    rp->r_flags, segs[i].ds_addr,
+			    (uint64_t *)&bp->bio_driver2);
+		} else {
+			bus_dmamap_sync(sc->sc_dmatag,
+			    (bus_dmamap_t)bp->bio_driver1,
+			    BUS_DMASYNC_PREWRITE);
+			err = lv1_storage_write(devid, rp->r_id,
+			    block, segs[i].ds_len/sc->sc_blksize,
+			    rp->r_flags, segs[i].ds_addr,
+			    (uint64_t *)&bp->bio_driver2);
+		}
+
+		if (err) {
+			if (err == LV1_BUSY) {
+				bioq_remove(&sc->sc_bioq, bp);
+				bioq_insert_tail(&sc->sc_deferredq, bp);
+			} else {
+				bus_dmamap_unload(sc->sc_dmatag, (bus_dmamap_t)
+				    bp->bio_driver1);
+				bus_dmamap_destroy(sc->sc_dmatag, (bus_dmamap_t)
+				    bp->bio_driver1);
+				device_printf(sc->sc_dev, "Could not read "
+				    "sectors (0x%08x)\n", err);
+				bp->bio_error = EINVAL;
+				bp->bio_flags |= BIO_ERROR;
+				bioq_remove(&sc->sc_bioq, bp);
+				biodone(bp);
+			}
+
+			break;
+		}
+
+		DPRINTF(sc, PS3DISK_DEBUG_READ, "%s: tag 0x%016lx\n",
+		    __func__, sc->sc_bounce_tag);
+	}
+}
+
+#ifdef PS3DISK_DEBUG
+static int
+ps3disk_sysctl_debug(SYSCTL_HANDLER_ARGS)
+{
+	struct ps3disk_softc *sc = arg1;
+	int debug, error;
+
+	debug = sc->sc_debug;
+
+	error = sysctl_handle_int(oidp, &debug, 0, req);
+	if (error || !req->newptr)
+		return error;
+
+	sc->sc_debug = debug;
+
+	return 0;
+}
+#endif
+
+static void
+ps3disk_sysctlattach(struct ps3disk_softc *sc)
+{
+#ifdef PS3DISK_DEBUG
+	struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->sc_dev);
+	struct sysctl_oid *tree = device_get_sysctl_tree(sc->sc_dev);
+
+	sc->sc_debug = ps3disk_debug;
+
+	SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
+		"debug", CTLTYPE_INT | CTLFLAG_RW, sc, 0,
+		ps3disk_sysctl_debug, "I", "control debugging printfs");
+#endif
+}
+
+static device_method_t ps3disk_methods[] = {
+	DEVMETHOD(device_probe,		ps3disk_probe),
+	DEVMETHOD(device_attach,	ps3disk_attach),
+	DEVMETHOD(device_detach,	ps3disk_detach),
+	{0, 0},
+};
+
+static driver_t ps3disk_driver = {
+	"ps3disk",
+	ps3disk_methods,
+	sizeof(struct ps3disk_softc),
+};
+
+static devclass_t ps3disk_devclass;
+
+DRIVER_MODULE(ps3disk, ps3bus, ps3disk_driver, ps3disk_devclass, 0, 0);