6b8f102054
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>
107 lines
3.9 KiB
C
107 lines
3.9 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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#ifndef VIRTIO_BUS_H
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#define VIRTIO_BUS_H
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#include "hw/qdev.h"
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#include "sysemu/sysemu.h"
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#include "hw/virtio/virtio.h"
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#define TYPE_VIRTIO_BUS "virtio-bus"
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#define VIRTIO_BUS_GET_CLASS(obj) \
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OBJECT_GET_CLASS(VirtioBusClass, obj, TYPE_VIRTIO_BUS)
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#define VIRTIO_BUS_CLASS(klass) \
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OBJECT_CLASS_CHECK(VirtioBusClass, klass, TYPE_VIRTIO_BUS)
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#define VIRTIO_BUS(obj) OBJECT_CHECK(VirtioBusState, (obj), TYPE_VIRTIO_BUS)
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typedef struct VirtioBusState VirtioBusState;
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typedef struct VirtioBusClass {
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/* This is what a VirtioBus must implement */
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BusClass parent;
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void (*notify)(DeviceState *d, uint16_t vector);
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void (*save_config)(DeviceState *d, QEMUFile *f);
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void (*save_queue)(DeviceState *d, int n, QEMUFile *f);
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int (*load_config)(DeviceState *d, QEMUFile *f);
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int (*load_queue)(DeviceState *d, int n, QEMUFile *f);
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int (*load_done)(DeviceState *d, QEMUFile *f);
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bool (*query_guest_notifiers)(DeviceState *d);
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int (*set_guest_notifiers)(DeviceState *d, int nvqs, bool assign);
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int (*set_host_notifier)(DeviceState *d, int n, bool assigned);
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void (*vmstate_change)(DeviceState *d, bool running);
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/*
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* transport independent init function.
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* This is called by virtio-bus just after the device is plugged.
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*/
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void (*device_plugged)(DeviceState *d);
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/*
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* transport independent exit function.
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* This is called by virtio-bus just before the device is unplugged.
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*/
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void (*device_unplugged)(DeviceState *d);
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int (*query_nvectors)(DeviceState *d);
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/*
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* Does the transport have variable vring alignment?
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* (ie can it ever call virtio_queue_set_align()?)
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* Note that changing this will break migration for this transport.
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*/
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bool has_variable_vring_alignment;
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} VirtioBusClass;
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struct VirtioBusState {
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BusState parent_obj;
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};
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int virtio_bus_device_plugged(VirtIODevice *vdev);
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void virtio_bus_reset(VirtioBusState *bus);
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void virtio_bus_device_unplugged(VirtIODevice *bus);
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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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/* 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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/* 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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/* 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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/* 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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/* 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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static inline VirtIODevice *virtio_bus_get_device(VirtioBusState *bus)
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{
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BusState *qbus = &bus->parent_obj;
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BusChild *kid = QTAILQ_FIRST(&qbus->children);
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DeviceState *qdev = kid ? kid->child : NULL;
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/* This is used on the data path, the cast is guaranteed
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* to succeed by the qdev machinery.
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*/
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return (VirtIODevice *)qdev;
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}
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#endif /* VIRTIO_BUS_H */
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