| /* |
| * 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); |
| int (*load_config)(DeviceState *d, QEMUFile *f); |
| int (*load_queue)(DeviceState *d, int n, QEMUFile *f); |
| int (*load_done)(DeviceState *d, QEMUFile *f); |
| unsigned (*get_features)(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); |
| /* |
| * transport independent exit function. |
| * This is called by virtio-bus just before the device is unplugged. |
| */ |
| void (*device_unplugged)(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; |
| }; |
| |
| int virtio_bus_device_plugged(VirtIODevice *vdev); |
| 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); |
| /* Set the features of the plugged device. */ |
| void virtio_bus_set_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 */ |