Differential D28070 Diff 82666 sys/dev/virtio/mmio/virtio_mmio.c

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sys/dev/virtio/mmio/virtio_mmio.c

Show First 20 Lines • Show All 165 Lines • ▼ Show 20 Lines	static device_method_t vtmmio_methods[] = {
DEVMETHOD_END		DEVMETHOD_END
};		};

DEFINE_CLASS_0(virtio_mmio, vtmmio_driver, vtmmio_methods,		DEFINE_CLASS_0(virtio_mmio, vtmmio_driver, vtmmio_methods,
sizeof(struct vtmmio_softc));		sizeof(struct vtmmio_softc));

MODULE_VERSION(virtio_mmio, 1);		MODULE_VERSION(virtio_mmio, 1);

		int
		vtmmio_probe(device_t dev)
		{
		struct vtmmio_softc *sc;
		int rid;
		uint32_t magic, version;

		sc = device_get_softc(dev);

		rid = 0;
		sc->res[0] = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
		RF_ACTIVE);
		if (sc->res[0] == NULL) {
		bryanvUnsubmitted Not Done Inline Actions Nit: style prefers it, and used elsewhere in this driver: explicitly compare this to NULL bryanv: Nit: style prefers it, and used elsewhere in this driver: explicitly compare this to NULL
		jrtc27AuthorUnsubmitted Done Inline Actions Thanks; blindly copied from vtmmio_attach without thinking. Will fix that at the same time as committing this (though in a separate commit). jrtc27: Thanks; blindly copied from vtmmio_attach without thinking. Will fix that at the same time as…
		device_printf(dev, "Cannot allocate memory window.\n");
		return (ENXIO);
		}

		magic = vtmmio_read_config_4(sc, VIRTIO_MMIO_MAGIC_VALUE);
		if (magic != VIRTIO_MMIO_MAGIC_VIRT) {
		device_printf(dev, "Bad magic value %#x\n", magic);
		bus_release_resource(dev, SYS_RES_MEMORY, rid, sc->res[0]);
		return (ENXIO);
		}

		version = vtmmio_read_config_4(sc, VIRTIO_MMIO_VERSION);
		if (version < 1 \|\| version > 2) {
		device_printf(dev, "Unsupported version: %#x\n", version);
		bus_release_resource(dev, SYS_RES_MEMORY, rid, sc->res[0]);
		return (ENXIO);
		}

		if (vtmmio_read_config_4(sc, VIRTIO_MMIO_DEVICE_ID) == 0) {
		bus_release_resource(dev, SYS_RES_MEMORY, rid, sc->res[0]);
		return (ENXIO);
		}

		bus_release_resource(dev, SYS_RES_MEMORY, rid, sc->res[0]);

		device_set_desc(dev, "VirtIO MMIO adapter");
		return (BUS_PROBE_DEFAULT);
		}

static int		static int
vtmmio_setup_intr(device_t dev, enum intr_type type)		vtmmio_setup_intr(device_t dev, enum intr_type type)
{		{
struct vtmmio_softc *sc;		struct vtmmio_softc *sc;
int rid;		int rid;
int err;		int err;

sc = device_get_softc(dev);		sc = device_get_softc(dev);
Show All 38 Lines	vtmmio_attach(device_t dev)
sc->res[0] = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,		sc->res[0] = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);		RF_ACTIVE);
if (sc->res[0] == NULL) {		if (sc->res[0] == NULL) {
device_printf(dev, "Cannot allocate memory window.\n");		device_printf(dev, "Cannot allocate memory window.\n");
return (ENXIO);		return (ENXIO);
}		}

sc->vtmmio_version = vtmmio_read_config_4(sc, VIRTIO_MMIO_VERSION);		sc->vtmmio_version = vtmmio_read_config_4(sc, VIRTIO_MMIO_VERSION);
if (sc->vtmmio_version < 1 \|\| sc->vtmmio_version > 2) {
device_printf(dev, "Unsupported version: %x\n",
sc->vtmmio_version);
bus_release_resource(dev, SYS_RES_MEMORY, 0,
sc->res[0]);
sc->res[0] = NULL;
return (ENXIO);
}

vtmmio_reset(sc);		vtmmio_reset(sc);

/* Tell the host we've noticed this device. */		/* Tell the host we've noticed this device. */
vtmmio_set_status(dev, VIRTIO_CONFIG_STATUS_ACK);		vtmmio_set_status(dev, VIRTIO_CONFIG_STATUS_ACK);

if ((child = device_add_child(dev, NULL, -1)) == NULL) {		if ((child = device_add_child(dev, NULL, -1)) == NULL) {
device_printf(dev, "Cannot create child device.\n");		device_printf(dev, "Cannot create child device.\n");
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