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25#ifndef VIRTIO_BUS_H
26#define VIRTIO_BUS_H
27
28#include "hw/qdev.h"
29#include "sysemu/sysemu.h"
30#include "hw/virtio/virtio.h"
31
32#define TYPE_VIRTIO_BUS "virtio-bus"
33#define VIRTIO_BUS_GET_CLASS(obj) \
34 OBJECT_GET_CLASS(VirtioBusClass, obj, TYPE_VIRTIO_BUS)
35#define VIRTIO_BUS_CLASS(klass) \
36 OBJECT_CLASS_CHECK(VirtioBusClass, klass, TYPE_VIRTIO_BUS)
37#define VIRTIO_BUS(obj) OBJECT_CHECK(VirtioBusState, (obj), TYPE_VIRTIO_BUS)
38
39typedef struct VirtioBusState VirtioBusState;
40
41typedef struct VirtioBusClass {
42
43 BusClass parent;
44 void (*notify)(DeviceState *d, uint16_t vector);
45 void (*save_config)(DeviceState *d, QEMUFile *f);
46 void (*save_queue)(DeviceState *d, int n, QEMUFile *f);
47 void (*save_extra_state)(DeviceState *d, QEMUFile *f);
48 int (*load_config)(DeviceState *d, QEMUFile *f);
49 int (*load_queue)(DeviceState *d, int n, QEMUFile *f);
50 int (*load_done)(DeviceState *d, QEMUFile *f);
51 int (*load_extra_state)(DeviceState *d, QEMUFile *f);
52 bool (*has_extra_state)(DeviceState *d);
53 bool (*query_guest_notifiers)(DeviceState *d);
54 int (*set_guest_notifiers)(DeviceState *d, int nvqs, bool assign);
55 int (*set_host_notifier)(DeviceState *d, int n, bool assigned);
56 void (*vmstate_change)(DeviceState *d, bool running);
57
58
59
60
61 void (*device_plugged)(DeviceState *d, Error **errp);
62
63
64
65
66 void (*post_plugged)(DeviceState *d, Error **errp);
67
68
69
70
71 void (*device_unplugged)(DeviceState *d);
72 int (*query_nvectors)(DeviceState *d);
73
74
75
76
77
78 bool has_variable_vring_alignment;
79} VirtioBusClass;
80
81struct VirtioBusState {
82 BusState parent_obj;
83};
84
85void virtio_bus_device_plugged(VirtIODevice *vdev, Error **errp);
86void virtio_bus_reset(VirtioBusState *bus);
87void virtio_bus_device_unplugged(VirtIODevice *bus);
88
89uint16_t virtio_bus_get_vdev_id(VirtioBusState *bus);
90
91size_t virtio_bus_get_vdev_config_len(VirtioBusState *bus);
92
93uint32_t virtio_bus_get_vdev_features(VirtioBusState *bus,
94 uint32_t requested_features);
95
96uint32_t virtio_bus_get_vdev_bad_features(VirtioBusState *bus);
97
98void virtio_bus_get_vdev_config(VirtioBusState *bus, uint8_t *config);
99
100void virtio_bus_set_vdev_config(VirtioBusState *bus, uint8_t *config);
101
102static inline VirtIODevice *virtio_bus_get_device(VirtioBusState *bus)
103{
104 BusState *qbus = &bus->parent_obj;
105 BusChild *kid = QTAILQ_FIRST(&qbus->children);
106 DeviceState *qdev = kid ? kid->child : NULL;
107
108
109
110
111 return (VirtIODevice *)qdev;
112}
113
114#endif
115