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* Copyright (C) 2012 : GreenSocs Ltd
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* http://www.greensocs.com/ , email: info@greensocs.com
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* Frederic Konrad <fred.konrad@greensocs.com>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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#include "qemu/error-report.h"
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#include "hw/virtio/virtio-bus.h"
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#include "hw/virtio/virtio.h"
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/* #define DEBUG_VIRTIO_BUS */
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#ifdef DEBUG_VIRTIO_BUS
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#define DPRINTF(fmt, ...) \
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do { printf("virtio_bus: " fmt , ## __VA_ARGS__); } while (0)
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#define DPRINTF(fmt, ...) do { } while (0)
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/* Plug the VirtIODevice */
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int virtio_bus_plug_device(VirtIODevice *vdev)
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DeviceState *qdev = DEVICE(vdev);
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BusState *qbus = BUS(qdev_get_parent_bus(qdev));
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VirtioBusState *bus = VIRTIO_BUS(qbus);
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VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(bus);
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DPRINTF("%s: plug device.\n", qbus->name);
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if (klass->device_plugged != NULL) {
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klass->device_plugged(qbus->parent);
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/* Reset the virtio_bus */
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void virtio_bus_reset(VirtioBusState *bus)
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DPRINTF("%s: reset device.\n", qbus->name);
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if (bus->vdev != NULL) {
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virtio_reset(bus->vdev);
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/* Destroy the VirtIODevice */
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void virtio_bus_destroy_device(VirtioBusState *bus)
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BusState *qbus = BUS(bus);
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VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(bus);
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DPRINTF("%s: remove device.\n", qbus->name);
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if (bus->vdev != NULL) {
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if (klass->device_unplug != NULL) {
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klass->device_unplug(qbus->parent);
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object_unparent(OBJECT(bus->vdev));
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/* Get the device id of the plugged device. */
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uint16_t virtio_bus_get_vdev_id(VirtioBusState *bus)
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assert(bus->vdev != NULL);
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return bus->vdev->device_id;
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/* Get the config_len field of the plugged device. */
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size_t virtio_bus_get_vdev_config_len(VirtioBusState *bus)
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assert(bus->vdev != NULL);
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return bus->vdev->config_len;
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/* Get the features of the plugged device. */
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uint32_t virtio_bus_get_vdev_features(VirtioBusState *bus,
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uint32_t requested_features)
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VirtioDeviceClass *k;
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assert(bus->vdev != NULL);
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k = VIRTIO_DEVICE_GET_CLASS(bus->vdev);
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assert(k->get_features != NULL);
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return k->get_features(bus->vdev, requested_features);
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/* Set the features of the plugged device. */
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void virtio_bus_set_vdev_features(VirtioBusState *bus,
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uint32_t requested_features)
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VirtioDeviceClass *k;
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assert(bus->vdev != NULL);
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k = VIRTIO_DEVICE_GET_CLASS(bus->vdev);
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if (k->set_features != NULL) {
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k->set_features(bus->vdev, requested_features);
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/* Get bad features of the plugged device. */
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uint32_t virtio_bus_get_vdev_bad_features(VirtioBusState *bus)
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VirtioDeviceClass *k;
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assert(bus->vdev != NULL);
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k = VIRTIO_DEVICE_GET_CLASS(bus->vdev);
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if (k->bad_features != NULL) {
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return k->bad_features(bus->vdev);
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/* Get config of the plugged device. */
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void virtio_bus_get_vdev_config(VirtioBusState *bus, uint8_t *config)
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VirtioDeviceClass *k;
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assert(bus->vdev != NULL);
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k = VIRTIO_DEVICE_GET_CLASS(bus->vdev);
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if (k->get_config != NULL) {
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k->get_config(bus->vdev, config);
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/* Set config of the plugged device. */
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void virtio_bus_set_vdev_config(VirtioBusState *bus, uint8_t *config)
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VirtioDeviceClass *k;
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assert(bus->vdev != NULL);
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k = VIRTIO_DEVICE_GET_CLASS(bus->vdev);
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if (k->set_config != NULL) {
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k->set_config(bus->vdev, config);
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static char *virtio_bus_get_dev_path(DeviceState *dev)
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BusState *bus = qdev_get_parent_bus(dev);
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DeviceState *proxy = DEVICE(bus->parent);
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return qdev_get_dev_path(proxy);
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static char *virtio_bus_get_fw_dev_path(DeviceState *dev)
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static void virtio_bus_class_init(ObjectClass *klass, void *data)
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BusClass *bus_class = BUS_CLASS(klass);
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bus_class->get_dev_path = virtio_bus_get_dev_path;
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bus_class->get_fw_dev_path = virtio_bus_get_fw_dev_path;
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static const TypeInfo virtio_bus_info = {
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.name = TYPE_VIRTIO_BUS,
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.instance_size = sizeof(VirtioBusState),
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.class_size = sizeof(VirtioBusClass),
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.class_init = virtio_bus_class_init
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static void virtio_register_types(void)
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type_register_static(&virtio_bus_info);
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type_init(virtio_register_types)