svn commit: r230232 - in projects/pseries: conf powerpc/pseries

[Nathan Whitehorn]

Author: nwhitehorn
Date: Mon Jan 16 20:45:29 2012
New Revision: 230232
URL: http://svn.freebsd.org/changeset/base/230232

Log:
  Add a root device for virtual devices. The lack of memory resources for
  these poses interesting challenges for integration into, say, uart(4).

Added:
  projects/pseries/powerpc/pseries/vdevice.c   (contents, props changed)
Modified:
  projects/pseries/conf/files.powerpc

Modified: projects/pseries/conf/files.powerpc
==============================================================================
--- projects/pseries/conf/files.powerpc	Mon Jan 16 20:42:56 2012	(r230231)
+++ projects/pseries/conf/files.powerpc	Mon Jan 16 20:45:29 2012	(r230232)
@@ -220,6 +220,7 @@ powerpc/pseries/phyp_console.c	optional	
 powerpc/pseries/platform_chrp.c	optional	pseries
 powerpc/pseries/rtas_dev.c	optional	pseries
 powerpc/pseries/rtas_pci.c	optional	pseries pci
+powerpc/pseries/vdevice.c	optional	pseries powerpc64
 powerpc/pseries/xics.c		optional	pseries powerpc64
 powerpc/psim/iobus.c 		optional	psim
 powerpc/psim/ata_iobus.c	optional	ata psim

Added: projects/pseries/powerpc/pseries/vdevice.c
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ projects/pseries/powerpc/pseries/vdevice.c	Mon Jan 16 20:45:29 2012	(r230232)
@@ -0,0 +1,131 @@
+/*-
+ * Copyright (c) 2011 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 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/systm.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/malloc.h>
+#include <sys/bus.h>
+#include <sys/cpu.h>
+#include <machine/bus.h>
+
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+static int	vdevice_probe(device_t);
+static int	vdevice_attach(device_t);
+static const struct ofw_bus_devinfo *vdevice_get_devinfo(device_t dev,
+    device_t child);
+
+static device_method_t vdevice_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,		vdevice_probe),
+	DEVMETHOD(device_attach,	vdevice_attach),
+
+	/* Bus interface */
+	DEVMETHOD(bus_add_child,	bus_generic_add_child),
+	DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
+
+	/* ofw_bus interface */
+	DEVMETHOD(ofw_bus_get_devinfo,	vdevice_get_devinfo),
+	DEVMETHOD(ofw_bus_get_compat,	ofw_bus_gen_get_compat),
+	DEVMETHOD(ofw_bus_get_model,	ofw_bus_gen_get_model),
+	DEVMETHOD(ofw_bus_get_name,	ofw_bus_gen_get_name),
+	DEVMETHOD(ofw_bus_get_node,	ofw_bus_gen_get_node),
+	DEVMETHOD(ofw_bus_get_type,	ofw_bus_gen_get_type),
+
+	DEVMETHOD_END
+};
+
+static driver_t vdevice_driver = {
+	"vdevice",
+	vdevice_methods,
+	0
+};
+
+static devclass_t vdevice_devclass;
+
+DRIVER_MODULE(vdevice, nexus, vdevice_driver, vdevice_devclass, 0, 0);
+
+static int 
+vdevice_probe(device_t dev) 
+{
+	const char	*name;
+
+	name = ofw_bus_get_name(dev);
+
+	if (name == NULL || strcmp(name, "vdevice") != 0)
+		return (ENXIO);
+
+	if (!ofw_bus_is_compatible(dev, "IBM,vdevice"))
+		return (ENXIO);
+
+	device_set_desc(dev, "POWER Hypervisor Virtual Device Root");
+
+	return (0);
+}
+
+static int 
+vdevice_attach(device_t dev) 
+{
+	phandle_t root, child;
+	device_t cdev;
+	struct ofw_bus_devinfo *dinfo;
+
+	root = ofw_bus_get_node(dev);
+
+	for (child = OF_child(root); child != 0; child = OF_peer(child)) {
+		dinfo = malloc(sizeof(*dinfo), M_DEVBUF, M_WAITOK | M_ZERO);
+
+                if (ofw_bus_gen_setup_devinfo(dinfo, child) != 0) {
+                        free(dinfo, M_DEVBUF);
+                        continue;
+                }
+                cdev = device_add_child(dev, NULL, -1);
+                if (cdev == NULL) {
+                        device_printf(dev, "<%s>: device_add_child failed\n",
+                            dinfo->obd_name);
+                        ofw_bus_gen_destroy_devinfo(dinfo);
+                        free(dinfo, M_DEVBUF);
+                        continue;
+                }
+		device_set_ivars(cdev, dinfo);
+	}
+
+	return (bus_generic_attach(dev));
+}
+
+static const struct ofw_bus_devinfo *
+vdevice_get_devinfo(device_t dev, device_t child) 
+{
+	return (device_get_ivars(child));	
+}
+