From 0a2acf5eb3237350e84693b9b37eced5080a1fef Mon Sep 17 00:00:00 2001
From: KONRAD Frederic <fred.konrad@greensocs.com>
Date: Tue, 15 Jan 2013 00:08:03 +0100
Subject: [PATCH] virtio-pci-bus: introduce virtio-pci-bus.

Introduce virtio-pci-bus, which extends virtio-bus. It is used with virtio-pci
transport device.

Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
---
 hw/virtio-pci.c | 37 +++++++++++++++++++++++++++++++++++++
 hw/virtio-pci.h | 15 +++++++++++++++
 2 files changed, 52 insertions(+)

diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c
index 212acd8418..904a7e1e90 100644
--- a/hw/virtio-pci.c
+++ b/hw/virtio-pci.c
@@ -31,6 +31,7 @@
 #include "sysemu/blockdev.h"
 #include "virtio-pci.h"
 #include "qemu/range.h"
+#include "virtio-bus.h"
 
 /* from Linux's linux/virtio_pci.h */
 
@@ -1311,6 +1312,41 @@ static const TypeInfo virtio_scsi_info = {
     .class_init    = virtio_scsi_class_init,
 };
 
+/* virtio-pci-bus */
+
+void virtio_pci_bus_new(VirtioBusState *bus, VirtIOPCIProxy *dev)
+{
+    DeviceState *qdev = DEVICE(dev);
+    BusState *qbus;
+    qbus_create_inplace((BusState *)bus, TYPE_VIRTIO_PCI_BUS, qdev, NULL);
+    qbus = BUS(bus);
+    qbus->allow_hotplug = 0;
+}
+
+static void virtio_pci_bus_class_init(ObjectClass *klass, void *data)
+{
+    BusClass *bus_class = BUS_CLASS(klass);
+    VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
+    bus_class->max_dev = 1;
+    k->notify = virtio_pci_notify;
+    k->save_config = virtio_pci_save_config;
+    k->load_config = virtio_pci_load_config;
+    k->save_queue = virtio_pci_save_queue;
+    k->load_queue = virtio_pci_load_queue;
+    k->get_features = virtio_pci_get_features;
+    k->query_guest_notifiers = virtio_pci_query_guest_notifiers;
+    k->set_host_notifier = virtio_pci_set_host_notifier;
+    k->set_guest_notifiers = virtio_pci_set_guest_notifiers;
+    k->vmstate_change = virtio_pci_vmstate_change;
+}
+
+static const TypeInfo virtio_pci_bus_info = {
+    .name          = TYPE_VIRTIO_PCI_BUS,
+    .parent        = TYPE_VIRTIO_BUS,
+    .instance_size = sizeof(VirtioPCIBusState),
+    .class_init    = virtio_pci_bus_class_init,
+};
+
 static void virtio_pci_register_types(void)
 {
     type_register_static(&virtio_blk_info);
@@ -1319,6 +1355,7 @@ static void virtio_pci_register_types(void)
     type_register_static(&virtio_balloon_info);
     type_register_static(&virtio_scsi_info);
     type_register_static(&virtio_rng_info);
+    type_register_static(&virtio_pci_bus_info);
 }
 
 type_init(virtio_pci_register_types)
diff --git a/hw/virtio-pci.h b/hw/virtio-pci.h
index 917b465874..d11e6225de 100644
--- a/hw/virtio-pci.h
+++ b/hw/virtio-pci.h
@@ -21,6 +21,20 @@
 #include "virtio-rng.h"
 #include "virtio-serial.h"
 #include "virtio-scsi.h"
+#include "virtio-bus.h"
+
+/* virtio-pci-bus */
+
+typedef struct VirtioBusState VirtioPCIBusState;
+typedef struct VirtioBusClass VirtioPCIBusClass;
+
+#define TYPE_VIRTIO_PCI_BUS "virtio-pci-bus"
+#define VIRTIO_PCI_BUS(obj) \
+        OBJECT_CHECK(VirtioPCIBusState, (obj), TYPE_VIRTIO_PCI_BUS)
+#define VIRTIO_PCI_BUS_GET_CLASS(obj) \
+        OBJECT_GET_CLASS(VirtioPCIBusClass, obj, TYPE_VIRTIO_PCI_BUS)
+#define VIRTIO_PCI_BUS_CLASS(klass) \
+        OBJECT_CLASS_CHECK(VirtioPCIBusClass, klass, TYPE_VIRTIO_PCI_BUS)
 
 /* Performance improves when virtqueue kick processing is decoupled from the
  * vcpu thread using ioeventfd for some devices. */
@@ -58,6 +72,7 @@ typedef struct {
 
 void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev);
 void virtio_pci_reset(DeviceState *d);
+void virtio_pci_bus_new(VirtioBusState *bus, VirtIOPCIProxy *dev);
 
 /* Virtio ABI version, if we increment this, we break the guest driver. */
 #define VIRTIO_PCI_ABI_VERSION          0
-- 
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