Move host_features from the individual transport proxies into the virtio device. Transports may continue to add feature bits during device plugging. This should it make easier to offer different sets of host features for virtio-1/transitional support. Tested-by: Shannon Zhao <shannon.zhao@linaro.org> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
179 lines
4.8 KiB
C
179 lines
4.8 KiB
C
/*
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* VirtioBus
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*
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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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*
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* Developed by :
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* Frederic Konrad <fred.konrad@greensocs.com>
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*
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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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*
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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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*
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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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*
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*/
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#include "hw/hw.h"
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#include "qemu/error-report.h"
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#include "hw/qdev.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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#else
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#define DPRINTF(fmt, ...) do { } while (0)
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#endif
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/* A VirtIODevice is being plugged */
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int virtio_bus_device_plugged(VirtIODevice *vdev)
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{
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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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VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
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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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}
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/* Get the features of the plugged device. */
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assert(vdc->get_features != NULL);
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vdev->host_features = vdc->get_features(vdev, vdev->host_features);
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return 0;
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}
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/* Reset the virtio_bus */
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void virtio_bus_reset(VirtioBusState *bus)
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{
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VirtIODevice *vdev = virtio_bus_get_device(bus);
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DPRINTF("%s: reset device.\n", BUS(bus)->name);
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if (vdev != NULL) {
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virtio_reset(vdev);
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}
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}
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/* A VirtIODevice is being unplugged */
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void virtio_bus_device_unplugged(VirtIODevice *vdev)
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{
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DeviceState *qdev = DEVICE(vdev);
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BusState *qbus = BUS(qdev_get_parent_bus(qdev));
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VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(qbus);
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DPRINTF("%s: remove device.\n", qbus->name);
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if (vdev != NULL) {
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if (klass->device_unplugged != NULL) {
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klass->device_unplugged(qbus->parent);
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}
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}
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}
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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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{
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VirtIODevice *vdev = virtio_bus_get_device(bus);
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assert(vdev != NULL);
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return vdev->device_id;
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}
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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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{
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VirtIODevice *vdev = virtio_bus_get_device(bus);
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assert(vdev != NULL);
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return vdev->config_len;
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}
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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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{
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VirtIODevice *vdev = virtio_bus_get_device(bus);
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VirtioDeviceClass *k;
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assert(vdev != NULL);
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k = VIRTIO_DEVICE_GET_CLASS(vdev);
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if (k->bad_features != NULL) {
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return k->bad_features(vdev);
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} else {
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return 0;
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}
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}
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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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{
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VirtIODevice *vdev = virtio_bus_get_device(bus);
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VirtioDeviceClass *k;
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assert(vdev != NULL);
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k = VIRTIO_DEVICE_GET_CLASS(vdev);
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if (k->get_config != NULL) {
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k->get_config(vdev, config);
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}
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}
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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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{
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VirtIODevice *vdev = virtio_bus_get_device(bus);
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VirtioDeviceClass *k;
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assert(vdev != NULL);
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k = VIRTIO_DEVICE_GET_CLASS(vdev);
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if (k->set_config != NULL) {
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k->set_config(vdev, config);
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}
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}
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static char *virtio_bus_get_dev_path(DeviceState *dev)
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{
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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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}
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static char *virtio_bus_get_fw_dev_path(DeviceState *dev)
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{
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return NULL;
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}
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static void virtio_bus_class_init(ObjectClass *klass, void *data)
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{
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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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}
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static const TypeInfo virtio_bus_info = {
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.name = TYPE_VIRTIO_BUS,
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.parent = TYPE_BUS,
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.instance_size = sizeof(VirtioBusState),
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.abstract = true,
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.class_size = sizeof(VirtioBusClass),
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.class_init = virtio_bus_class_init
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};
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static void virtio_register_types(void)
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{
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type_register_static(&virtio_bus_info);
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}
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type_init(virtio_register_types)
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