diff options
Diffstat (limited to 'src/include/hw/virtio/virtio-bus.h')
| -rw-r--r-- | src/include/hw/virtio/virtio-bus.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/src/include/hw/virtio/virtio-bus.h b/src/include/hw/virtio/virtio-bus.h new file mode 100644 index 0000000..3f2c136 --- /dev/null +++ b/src/include/hw/virtio/virtio-bus.h @@ -0,0 +1,114 @@ +/* + * 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); + void (*save_extra_state)(DeviceState *d, 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); + int (*load_extra_state)(DeviceState *d, QEMUFile *f); + bool (*has_extra_state)(DeviceState *d); + 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); + /* + * Re-evaluate setup after feature bits have been validated + * by the device backend. + */ + void (*post_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 */ |
