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25#ifndef VIRTIO_BUS_H
26#define VIRTIO_BUS_H
27
28#include "hw/qdev-core.h"
29#include "hw/virtio/virtio.h"
30#include "qom/object.h"
31
32#define TYPE_VIRTIO_BUS "virtio-bus"
33typedef struct VirtioBusClass VirtioBusClass;
34typedef struct VirtioBusState VirtioBusState;
35DECLARE_OBJ_CHECKERS(VirtioBusState, VirtioBusClass,
36 VIRTIO_BUS, TYPE_VIRTIO_BUS)
37
38
39struct VirtioBusClass {
40
41 BusClass parent;
42 void (*notify)(DeviceState *d, uint16_t vector);
43 void (*save_config)(DeviceState *d, QEMUFile *f);
44 void (*save_queue)(DeviceState *d, int n, QEMUFile *f);
45 void (*save_extra_state)(DeviceState *d, QEMUFile *f);
46 int (*load_config)(DeviceState *d, QEMUFile *f);
47 int (*load_queue)(DeviceState *d, int n, QEMUFile *f);
48 int (*load_done)(DeviceState *d, QEMUFile *f);
49 int (*load_extra_state)(DeviceState *d, QEMUFile *f);
50 bool (*has_extra_state)(DeviceState *d);
51 bool (*query_guest_notifiers)(DeviceState *d);
52 int (*set_guest_notifiers)(DeviceState *d, int nvqs, bool assign);
53 int (*set_host_notifier_mr)(DeviceState *d, int n,
54 MemoryRegion *mr, bool assign);
55 void (*vmstate_change)(DeviceState *d, bool running);
56
57
58
59
60 void (*pre_plugged)(DeviceState *d, Error **errp);
61
62
63
64
65 void (*device_plugged)(DeviceState *d, Error **errp);
66
67
68
69
70 void (*device_unplugged)(DeviceState *d);
71 int (*query_nvectors)(DeviceState *d);
72
73
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75
76
77 bool (*ioeventfd_enabled)(DeviceState *d);
78
79
80
81
82
83 int (*ioeventfd_assign)(DeviceState *d, EventNotifier *notifier,
84 int n, bool assign);
85
86
87
88 bool (*queue_enabled)(DeviceState *d, int n);
89
90
91
92
93
94 bool has_variable_vring_alignment;
95 AddressSpace *(*get_dma_as)(DeviceState *d);
96 bool (*iommu_enabled)(DeviceState *d);
97};
98
99struct VirtioBusState {
100 BusState parent_obj;
101
102
103
104
105 bool ioeventfd_started;
106
107
108
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111
112
113
114
115 int ioeventfd_grabbed;
116};
117
118void virtio_bus_device_plugged(VirtIODevice *vdev, Error **errp);
119void virtio_bus_reset(VirtioBusState *bus);
120void virtio_bus_device_unplugged(VirtIODevice *bus);
121
122uint16_t virtio_bus_get_vdev_id(VirtioBusState *bus);
123
124size_t virtio_bus_get_vdev_config_len(VirtioBusState *bus);
125
126uint32_t virtio_bus_get_vdev_bad_features(VirtioBusState *bus);
127
128void virtio_bus_get_vdev_config(VirtioBusState *bus, uint8_t *config);
129
130void virtio_bus_set_vdev_config(VirtioBusState *bus, uint8_t *config);
131
132static inline VirtIODevice *virtio_bus_get_device(VirtioBusState *bus)
133{
134 BusState *qbus = &bus->parent_obj;
135 BusChild *kid = QTAILQ_FIRST(&qbus->children);
136 DeviceState *qdev = kid ? kid->child : NULL;
137
138
139
140
141 return (VirtIODevice *)qdev;
142}
143
144
145bool virtio_bus_ioeventfd_enabled(VirtioBusState *bus);
146
147int virtio_bus_start_ioeventfd(VirtioBusState *bus);
148
149void virtio_bus_stop_ioeventfd(VirtioBusState *bus);
150
151int virtio_bus_grab_ioeventfd(VirtioBusState *bus);
152
153void virtio_bus_release_ioeventfd(VirtioBusState *bus);
154
155int virtio_bus_set_host_notifier(VirtioBusState *bus, int n, bool assign);
156
157void virtio_bus_cleanup_host_notifier(VirtioBusState *bus, int n);
158
159bool virtio_bus_device_iommu_enabled(VirtIODevice *vdev);
160#endif
161