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-rw-r--r--hw/virtio/virtio-bus.c164
1 files changed, 164 insertions, 0 deletions
diff --git a/hw/virtio/virtio-bus.c b/hw/virtio/virtio-bus.c
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+++ b/hw/virtio/virtio-bus.c
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+/*
+ * 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/>.
+ *
+ */
+
+#include "hw/hw.h"
+#include "qemu/error-report.h"
+#include "hw/qdev.h"
+#include "hw/virtio/virtio-bus.h"
+#include "hw/virtio/virtio.h"
+
+/* #define DEBUG_VIRTIO_BUS */
+
+#ifdef DEBUG_VIRTIO_BUS
+#define DPRINTF(fmt, ...) \
+do { printf("virtio_bus: " fmt , ## __VA_ARGS__); } while (0)
+#else
+#define DPRINTF(fmt, ...) do { } while (0)
+#endif
+
+/* Plug the VirtIODevice */
+int virtio_bus_plug_device(VirtIODevice *vdev)
+{
+ DeviceState *qdev = DEVICE(vdev);
+ BusState *qbus = BUS(qdev_get_parent_bus(qdev));
+ VirtioBusState *bus = VIRTIO_BUS(qbus);
+ VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(bus);
+ DPRINTF("%s: plug device.\n", qbus->name);
+
+ bus->vdev = vdev;
+
+ /*
+ * The lines below will disappear when we drop VirtIOBindings, at the end
+ * of the series.
+ */
+ bus->bindings.notify = klass->notify;
+ bus->bindings.save_config = klass->save_config;
+ bus->bindings.save_queue = klass->save_queue;
+ bus->bindings.load_config = klass->load_config;
+ bus->bindings.load_queue = klass->load_queue;
+ bus->bindings.load_done = klass->load_done;
+ bus->bindings.get_features = klass->get_features;
+ bus->bindings.query_guest_notifiers = klass->query_guest_notifiers;
+ bus->bindings.set_guest_notifiers = klass->set_guest_notifiers;
+ bus->bindings.set_host_notifier = klass->set_host_notifier;
+ bus->bindings.vmstate_change = klass->vmstate_change;
+ virtio_bind_device(bus->vdev, &bus->bindings, qbus->parent);
+
+ if (klass->device_plugged != NULL) {
+ klass->device_plugged(qbus->parent);
+ }
+
+ return 0;
+}
+
+/* Reset the virtio_bus */
+void virtio_bus_reset(VirtioBusState *bus)
+{
+ DPRINTF("%s: reset device.\n", qbus->name);
+ if (bus->vdev != NULL) {
+ virtio_reset(bus->vdev);
+ }
+}
+
+/* Destroy the VirtIODevice */
+void virtio_bus_destroy_device(VirtioBusState *bus)
+{
+ DeviceState *qdev;
+ BusState *qbus = BUS(bus);
+ VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(bus);
+ DPRINTF("%s: remove device.\n", qbus->name);
+
+ if (bus->vdev != NULL) {
+ if (klass->device_unplug != NULL) {
+ klass->device_unplug(qbus->parent);
+ }
+ qdev = DEVICE(bus->vdev);
+ qdev_free(qdev);
+ bus->vdev = NULL;
+ }
+}
+
+/* Get the device id of the plugged device. */
+uint16_t virtio_bus_get_vdev_id(VirtioBusState *bus)
+{
+ assert(bus->vdev != NULL);
+ return bus->vdev->device_id;
+}
+
+/* Get the config_len field of the plugged device. */
+size_t virtio_bus_get_vdev_config_len(VirtioBusState *bus)
+{
+ assert(bus->vdev != NULL);
+ return bus->vdev->config_len;
+}
+
+/* Get the features of the plugged device. */
+uint32_t virtio_bus_get_vdev_features(VirtioBusState *bus,
+ uint32_t requested_features)
+{
+ VirtioDeviceClass *k;
+ assert(bus->vdev != NULL);
+ k = VIRTIO_DEVICE_GET_CLASS(bus->vdev);
+ assert(k->get_features != NULL);
+ return k->get_features(bus->vdev, requested_features);
+}
+
+/* Get bad features of the plugged device. */
+uint32_t virtio_bus_get_vdev_bad_features(VirtioBusState *bus)
+{
+ VirtioDeviceClass *k;
+ assert(bus->vdev != NULL);
+ k = VIRTIO_DEVICE_GET_CLASS(bus->vdev);
+ if (k->bad_features != NULL) {
+ return k->bad_features(bus->vdev);
+ } else {
+ return 0;
+ }
+}
+
+/* Get config of the plugged device. */
+void virtio_bus_get_vdev_config(VirtioBusState *bus, uint8_t *config)
+{
+ VirtioDeviceClass *k;
+ assert(bus->vdev != NULL);
+ k = VIRTIO_DEVICE_GET_CLASS(bus->vdev);
+ if (k->get_config != NULL) {
+ k->get_config(bus->vdev, config);
+ }
+}
+
+static const TypeInfo virtio_bus_info = {
+ .name = TYPE_VIRTIO_BUS,
+ .parent = TYPE_BUS,
+ .instance_size = sizeof(VirtioBusState),
+ .abstract = true,
+ .class_size = sizeof(VirtioBusClass),
+};
+
+static void virtio_register_types(void)
+{
+ type_register_static(&virtio_bus_info);
+}
+
+type_init(virtio_register_types)