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authorIgor Mammedov <imammedo@redhat.com>2014-02-05 16:36:44 +0100
committerMichael S. Tsirkin <mst@redhat.com>2014-02-10 10:23:35 +0200
commit9f117d41841e13ca29cc2a10ac03258339ea1f8b (patch)
tree1e791ddf600673b7fe9bce9c114c448c983f851c
parenta1483f88b6e21dd3ea481a021e5d4f7f273204c6 (diff)
define hotplug interface
Provide a generic hotplug interface for hotplug handlers. Intended for replacing hotplug mechanism used by PCI/PCIE/SHPC code and will be used for memory hotplug. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
-rw-r--r--hw/core/Makefile.objs1
-rw-r--r--hw/core/hotplug.c48
-rw-r--r--include/hw/hotplug.h78
3 files changed, 127 insertions, 0 deletions
diff --git a/hw/core/Makefile.objs b/hw/core/Makefile.objs
index 950146c6ff..9e324befd6 100644
--- a/hw/core/Makefile.objs
+++ b/hw/core/Makefile.objs
@@ -2,6 +2,7 @@
common-obj-y += qdev.o qdev-properties.o
# irq.o needed for qdev GPIO handling:
common-obj-y += irq.o
+common-obj-y += hotplug.o
common-obj-$(CONFIG_EMPTY_SLOT) += empty_slot.o
common-obj-$(CONFIG_XILINX_AXI) += stream.o
diff --git a/hw/core/hotplug.c b/hw/core/hotplug.c
new file mode 100644
index 0000000000..5573d9d2d9
--- /dev/null
+++ b/hw/core/hotplug.c
@@ -0,0 +1,48 @@
+/*
+ * Hotplug handler interface.
+ *
+ * Copyright (c) 2014 Red Hat Inc.
+ *
+ * Authors:
+ * Igor Mammedov <imammedo@redhat.com>,
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+#include "hw/hotplug.h"
+#include "qemu/module.h"
+
+void hotplug_handler_plug(HotplugHandler *plug_handler,
+ DeviceState *plugged_dev,
+ Error **errp)
+{
+ HotplugHandlerClass *hdc = HOTPLUG_HANDLER_GET_CLASS(plug_handler);
+
+ if (hdc->plug) {
+ hdc->plug(plug_handler, plugged_dev, errp);
+ }
+}
+
+void hotplug_handler_unplug(HotplugHandler *plug_handler,
+ DeviceState *plugged_dev,
+ Error **errp)
+{
+ HotplugHandlerClass *hdc = HOTPLUG_HANDLER_GET_CLASS(plug_handler);
+
+ if (hdc->unplug) {
+ hdc->unplug(plug_handler, plugged_dev, errp);
+ }
+}
+
+static const TypeInfo hotplug_handler_info = {
+ .name = TYPE_HOTPLUG_HANDLER,
+ .parent = TYPE_INTERFACE,
+ .class_size = sizeof(HotplugHandlerClass),
+};
+
+static void hotplug_handler_register_types(void)
+{
+ type_register_static(&hotplug_handler_info);
+}
+
+type_init(hotplug_handler_register_types)
diff --git a/include/hw/hotplug.h b/include/hw/hotplug.h
new file mode 100644
index 0000000000..a6533cb0b1
--- /dev/null
+++ b/include/hw/hotplug.h
@@ -0,0 +1,78 @@
+/*
+ * Hotplug handler interface.
+ *
+ * Copyright (c) 2014 Red Hat Inc.
+ *
+ * Authors:
+ * Igor Mammedov <imammedo@redhat.com>,
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+#ifndef HOTPLUG_H
+#define HOTPLUG_H
+
+#include "qom/object.h"
+#include "qemu/typedefs.h"
+
+#define TYPE_HOTPLUG_HANDLER "hotplug-handler"
+
+#define HOTPLUG_HANDLER_CLASS(klass) \
+ OBJECT_CLASS_CHECK(HotplugHandlerClass, (klass), TYPE_HOTPLUG_HANDLER)
+#define HOTPLUG_HANDLER_GET_CLASS(obj) \
+ OBJECT_GET_CLASS(HotplugHandlerClass, (obj), TYPE_HOTPLUG_HANDLER)
+#define HOTPLUG_HANDLER(obj) \
+ INTERFACE_CHECK(HotplugHandler, (obj), TYPE_HOTPLUG_HANDLER)
+
+
+typedef struct HotplugHandler {
+ /* <private> */
+ Object Parent;
+} HotplugHandler;
+
+/**
+ * hotplug_fn:
+ * @plug_handler: a device performing plug/uplug action
+ * @plugged_dev: a device that has been (un)plugged
+ * @errp: returns an error if this function fails
+ */
+typedef void (*hotplug_fn)(HotplugHandler *plug_handler,
+ DeviceState *plugged_dev, Error **errp);
+
+/**
+ * HotplugDeviceClass:
+ *
+ * Interface to be implemented by a device performing
+ * hardware (un)plug functions.
+ *
+ * @parent: Opaque parent interface.
+ * @plug: plug callback.
+ * @unplug: unplug callback.
+ */
+typedef struct HotplugHandlerClass {
+ /* <private> */
+ InterfaceClass parent;
+
+ /* <public> */
+ hotplug_fn plug;
+ hotplug_fn unplug;
+} HotplugHandlerClass;
+
+/**
+ * hotplug_handler_plug:
+ *
+ * Call #HotplugHandlerClass.plug callback of @plug_handler.
+ */
+void hotplug_handler_plug(HotplugHandler *plug_handler,
+ DeviceState *plugged_dev,
+ Error **errp);
+
+/**
+ * hotplug_handler_unplug:
+ *
+ * Call #HotplugHandlerClass.unplug callback of @plug_handler.
+ */
+void hotplug_handler_unplug(HotplugHandler *plug_handler,
+ DeviceState *plugged_dev,
+ Error **errp);
+#endif