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 /* A VirtIODevice is being plugged */
41 void virtio_bus_device_plugged(VirtIODevice
*vdev
, Error
**errp
)
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 VirtioDeviceClass
*vdc
= VIRTIO_DEVICE_GET_CLASS(vdev
);
49 DPRINTF("%s: plug device.\n", qbus
->name
);
51 if (klass
->device_plugged
!= NULL
) {
52 klass
->device_plugged(qbus
->parent
, errp
);
55 /* Get the features of the plugged device. */
56 assert(vdc
->get_features
!= NULL
);
57 vdev
->host_features
= vdc
->get_features(vdev
, vdev
->host_features
,
61 /* Reset the virtio_bus */
62 void virtio_bus_reset(VirtioBusState
*bus
)
64 VirtIODevice
*vdev
= virtio_bus_get_device(bus
);
66 DPRINTF("%s: reset device.\n", BUS(bus
)->name
);
72 /* A VirtIODevice is being unplugged */
73 void virtio_bus_device_unplugged(VirtIODevice
*vdev
)
75 DeviceState
*qdev
= DEVICE(vdev
);
76 BusState
*qbus
= BUS(qdev_get_parent_bus(qdev
));
77 VirtioBusClass
*klass
= VIRTIO_BUS_GET_CLASS(qbus
);
79 DPRINTF("%s: remove device.\n", qbus
->name
);
82 if (klass
->device_unplugged
!= NULL
) {
83 klass
->device_unplugged(qbus
->parent
);
88 /* Get the device id of the plugged device. */
89 uint16_t virtio_bus_get_vdev_id(VirtioBusState
*bus
)
91 VirtIODevice
*vdev
= virtio_bus_get_device(bus
);
93 return vdev
->device_id
;
96 /* Get the config_len field of the plugged device. */
97 size_t virtio_bus_get_vdev_config_len(VirtioBusState
*bus
)
99 VirtIODevice
*vdev
= virtio_bus_get_device(bus
);
100 assert(vdev
!= NULL
);
101 return vdev
->config_len
;
104 /* Get bad features of the plugged device. */
105 uint32_t virtio_bus_get_vdev_bad_features(VirtioBusState
*bus
)
107 VirtIODevice
*vdev
= virtio_bus_get_device(bus
);
108 VirtioDeviceClass
*k
;
110 assert(vdev
!= NULL
);
111 k
= VIRTIO_DEVICE_GET_CLASS(vdev
);
112 if (k
->bad_features
!= NULL
) {
113 return k
->bad_features(vdev
);
119 /* Get config of the plugged device. */
120 void virtio_bus_get_vdev_config(VirtioBusState
*bus
, uint8_t *config
)
122 VirtIODevice
*vdev
= virtio_bus_get_device(bus
);
123 VirtioDeviceClass
*k
;
125 assert(vdev
!= NULL
);
126 k
= VIRTIO_DEVICE_GET_CLASS(vdev
);
127 if (k
->get_config
!= NULL
) {
128 k
->get_config(vdev
, config
);
132 /* Set config of the plugged device. */
133 void virtio_bus_set_vdev_config(VirtioBusState
*bus
, uint8_t *config
)
135 VirtIODevice
*vdev
= virtio_bus_get_device(bus
);
136 VirtioDeviceClass
*k
;
138 assert(vdev
!= NULL
);
139 k
= VIRTIO_DEVICE_GET_CLASS(vdev
);
140 if (k
->set_config
!= NULL
) {
141 k
->set_config(vdev
, config
);
145 static char *virtio_bus_get_dev_path(DeviceState
*dev
)
147 BusState
*bus
= qdev_get_parent_bus(dev
);
148 DeviceState
*proxy
= DEVICE(bus
->parent
);
149 return qdev_get_dev_path(proxy
);
152 static char *virtio_bus_get_fw_dev_path(DeviceState
*dev
)
157 static void virtio_bus_class_init(ObjectClass
*klass
, void *data
)
159 BusClass
*bus_class
= BUS_CLASS(klass
);
160 bus_class
->get_dev_path
= virtio_bus_get_dev_path
;
161 bus_class
->get_fw_dev_path
= virtio_bus_get_fw_dev_path
;
164 static const TypeInfo virtio_bus_info
= {
165 .name
= TYPE_VIRTIO_BUS
,
167 .instance_size
= sizeof(VirtioBusState
),
169 .class_size
= sizeof(VirtioBusClass
),
170 .class_init
= virtio_bus_class_init
173 static void virtio_register_types(void)
175 type_register_static(&virtio_bus_info
);
178 type_init(virtio_register_types
)