4 * Copyright (C) 2012 : GreenSocs Ltd
5 * http://www.greensocs.com/ , email: info@greensocs.com
8 * Frederic Konrad <fred.konrad@greensocs.com>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation, either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, see <http://www.gnu.org/licenses/>.
26 #include "qemu/error-report.h"
28 #include "hw/virtio/virtio-bus.h"
29 #include "hw/virtio/virtio.h"
31 /* #define DEBUG_VIRTIO_BUS */
33 #ifdef DEBUG_VIRTIO_BUS
34 #define DPRINTF(fmt, ...) \
35 do { printf("virtio_bus: " fmt , ## __VA_ARGS__); } while (0)
37 #define DPRINTF(fmt, ...) do { } while (0)
40 /* Plug the VirtIODevice */
41 int virtio_bus_plug_device(VirtIODevice
*vdev
)
43 DeviceState
*qdev
= DEVICE(vdev
);
44 BusState
*qbus
= BUS(qdev_get_parent_bus(qdev
));
45 VirtioBusState
*bus
= VIRTIO_BUS(qbus
);
46 VirtioBusClass
*klass
= VIRTIO_BUS_GET_CLASS(bus
);
47 DPRINTF("%s: plug device.\n", qbus
->name
);
51 if (klass
->device_plugged
!= NULL
) {
52 klass
->device_plugged(qbus
->parent
);
58 /* Reset the virtio_bus */
59 void virtio_bus_reset(VirtioBusState
*bus
)
61 DPRINTF("%s: reset device.\n", qbus
->name
);
62 if (bus
->vdev
!= NULL
) {
63 virtio_reset(bus
->vdev
);
67 /* Destroy the VirtIODevice */
68 void virtio_bus_destroy_device(VirtioBusState
*bus
)
71 BusState
*qbus
= BUS(bus
);
72 VirtioBusClass
*klass
= VIRTIO_BUS_GET_CLASS(bus
);
73 DPRINTF("%s: remove device.\n", qbus
->name
);
75 if (bus
->vdev
!= NULL
) {
76 if (klass
->device_unplug
!= NULL
) {
77 klass
->device_unplug(qbus
->parent
);
79 qdev
= DEVICE(bus
->vdev
);
85 /* Get the device id of the plugged device. */
86 uint16_t virtio_bus_get_vdev_id(VirtioBusState
*bus
)
88 assert(bus
->vdev
!= NULL
);
89 return bus
->vdev
->device_id
;
92 /* Get the config_len field of the plugged device. */
93 size_t virtio_bus_get_vdev_config_len(VirtioBusState
*bus
)
95 assert(bus
->vdev
!= NULL
);
96 return bus
->vdev
->config_len
;
99 /* Get the features of the plugged device. */
100 uint32_t virtio_bus_get_vdev_features(VirtioBusState
*bus
,
101 uint32_t requested_features
)
103 VirtioDeviceClass
*k
;
104 assert(bus
->vdev
!= NULL
);
105 k
= VIRTIO_DEVICE_GET_CLASS(bus
->vdev
);
106 assert(k
->get_features
!= NULL
);
107 return k
->get_features(bus
->vdev
, requested_features
);
110 /* Set the features of the plugged device. */
111 void virtio_bus_set_vdev_features(VirtioBusState
*bus
,
112 uint32_t requested_features
)
114 VirtioDeviceClass
*k
;
115 assert(bus
->vdev
!= NULL
);
116 k
= VIRTIO_DEVICE_GET_CLASS(bus
->vdev
);
117 if (k
->set_features
!= NULL
) {
118 k
->set_features(bus
->vdev
, requested_features
);
122 /* Get bad features of the plugged device. */
123 uint32_t virtio_bus_get_vdev_bad_features(VirtioBusState
*bus
)
125 VirtioDeviceClass
*k
;
126 assert(bus
->vdev
!= NULL
);
127 k
= VIRTIO_DEVICE_GET_CLASS(bus
->vdev
);
128 if (k
->bad_features
!= NULL
) {
129 return k
->bad_features(bus
->vdev
);
135 /* Get config of the plugged device. */
136 void virtio_bus_get_vdev_config(VirtioBusState
*bus
, uint8_t *config
)
138 VirtioDeviceClass
*k
;
139 assert(bus
->vdev
!= NULL
);
140 k
= VIRTIO_DEVICE_GET_CLASS(bus
->vdev
);
141 if (k
->get_config
!= NULL
) {
142 k
->get_config(bus
->vdev
, config
);
146 /* Set config of the plugged device. */
147 void virtio_bus_set_vdev_config(VirtioBusState
*bus
, uint8_t *config
)
149 VirtioDeviceClass
*k
;
150 assert(bus
->vdev
!= NULL
);
151 k
= VIRTIO_DEVICE_GET_CLASS(bus
->vdev
);
152 if (k
->set_config
!= NULL
) {
153 k
->set_config(bus
->vdev
, config
);
157 static char *virtio_bus_get_dev_path(DeviceState
*dev
)
159 BusState
*bus
= qdev_get_parent_bus(dev
);
160 DeviceState
*proxy
= DEVICE(bus
->parent
);
161 return qdev_get_dev_path(proxy
);
164 static void virtio_bus_class_init(ObjectClass
*klass
, void *data
)
166 BusClass
*bus_class
= BUS_CLASS(klass
);
167 bus_class
->get_dev_path
= virtio_bus_get_dev_path
;
170 static const TypeInfo virtio_bus_info
= {
171 .name
= TYPE_VIRTIO_BUS
,
173 .instance_size
= sizeof(VirtioBusState
),
175 .class_size
= sizeof(VirtioBusClass
),
176 .class_init
= virtio_bus_class_init
179 static void virtio_register_types(void)
181 type_register_static(&virtio_bus_info
);
184 type_init(virtio_register_types
)