Add qemu 2.4.0

[kvmfornfv.git] / qemu / include / hw / virtio / virtio-bus.h

diff --git a/qemu/include/hw/virtio/virtio-bus.h b/qemu/include/hw/virtio/virtio-bus.h
new file mode 100644 (file)
index 0000000..8811415
--- /dev/null
+++ b/qemu/include/hw/virtio/virtio-bus.h
@@ -0,0 +1,106 @@
+/*
+ * VirtioBus
+ *
+ *  Copyright (C) 2012 : GreenSocs Ltd
+ *      http://www.greensocs.com/ , email: info@greensocs.com
+ *
+ *  Developed by :
+ *  Frederic Konrad   <fred.konrad@greensocs.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef VIRTIO_BUS_H
+#define VIRTIO_BUS_H
+
+#include "hw/qdev.h"
+#include "sysemu/sysemu.h"
+#include "hw/virtio/virtio.h"
+
+#define TYPE_VIRTIO_BUS "virtio-bus"
+#define VIRTIO_BUS_GET_CLASS(obj) \
+        OBJECT_GET_CLASS(VirtioBusClass, obj, TYPE_VIRTIO_BUS)
+#define VIRTIO_BUS_CLASS(klass) \
+        OBJECT_CLASS_CHECK(VirtioBusClass, klass, TYPE_VIRTIO_BUS)
+#define VIRTIO_BUS(obj) OBJECT_CHECK(VirtioBusState, (obj), TYPE_VIRTIO_BUS)
+
+typedef struct VirtioBusState VirtioBusState;
+
+typedef struct VirtioBusClass {
+    /* This is what a VirtioBus must implement */
+    BusClass parent;
+    void (*notify)(DeviceState *d, uint16_t vector);
+    void (*save_config)(DeviceState *d, QEMUFile *f);
+    void (*save_queue)(DeviceState *d, int n, QEMUFile *f);
+    int (*load_config)(DeviceState *d, QEMUFile *f);
+    int (*load_queue)(DeviceState *d, int n, QEMUFile *f);
+    int (*load_done)(DeviceState *d, QEMUFile *f);
+    bool (*query_guest_notifiers)(DeviceState *d);
+    int (*set_guest_notifiers)(DeviceState *d, int nvqs, bool assign);
+    int (*set_host_notifier)(DeviceState *d, int n, bool assigned);
+    void (*vmstate_change)(DeviceState *d, bool running);
+    /*
+     * transport independent init function.
+     * This is called by virtio-bus just after the device is plugged.
+     */
+    void (*device_plugged)(DeviceState *d, Error **errp);
+    /*
+     * transport independent exit function.
+     * This is called by virtio-bus just before the device is unplugged.
+     */
+    void (*device_unplugged)(DeviceState *d);
+    int (*query_nvectors)(DeviceState *d);
+    /*
+     * Does the transport have variable vring alignment?
+     * (ie can it ever call virtio_queue_set_align()?)
+     * Note that changing this will break migration for this transport.
+     */
+    bool has_variable_vring_alignment;
+} VirtioBusClass;
+
+struct VirtioBusState {
+    BusState parent_obj;
+};
+
+void virtio_bus_device_plugged(VirtIODevice *vdev, Error **errp);
+void virtio_bus_reset(VirtioBusState *bus);
+void virtio_bus_device_unplugged(VirtIODevice *bus);
+/* Get the device id of the plugged device. */
+uint16_t virtio_bus_get_vdev_id(VirtioBusState *bus);
+/* Get the config_len field of the plugged device. */
+size_t virtio_bus_get_vdev_config_len(VirtioBusState *bus);
+/* Get the features of the plugged device. */
+uint32_t virtio_bus_get_vdev_features(VirtioBusState *bus,
+                                    uint32_t requested_features);
+/* Get bad features of the plugged device. */
+uint32_t virtio_bus_get_vdev_bad_features(VirtioBusState *bus);
+/* Get config of the plugged device. */
+void virtio_bus_get_vdev_config(VirtioBusState *bus, uint8_t *config);
+/* Set config of the plugged device. */
+void virtio_bus_set_vdev_config(VirtioBusState *bus, uint8_t *config);
+
+static inline VirtIODevice *virtio_bus_get_device(VirtioBusState *bus)
+{
+    BusState *qbus = &bus->parent_obj;
+    BusChild *kid = QTAILQ_FIRST(&qbus->children);
+    DeviceState *qdev = kid ? kid->child : NULL;
+
+    /* This is used on the data path, the cast is guaranteed
+     * to succeed by the qdev machinery.
+     */
+    return (VirtIODevice *)qdev;
+}
+
+#endif /* VIRTIO_BUS_H */