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virtio-bus: introduce virtio-bus 

Introduce virtio-bus. Refactored transport device will create a bus which
extends virtio-bus.

Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
KONRAD Frederic 2013-01-15 00:08:01 +01:00 committed by Anthony Liguori
parent 1395af6f76
commit ff8eca5536
3 changed files with 217 additions and 0 deletions
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1
hw/Makefile.objs
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@ -8,6 +8,7 @@ common-obj-y += loader.o
common-obj-$(CONFIG_VIRTIO) += virtio-console.o
common-obj-$(CONFIG_VIRTIO) += virtio-rng.o
common-obj-$(CONFIG_VIRTIO_PCI) += virtio-pci.o
common-obj-$(CONFIG_VIRTIO) += virtio-bus.o
common-obj-y += fw_cfg.o
common-obj-$(CONFIG_PCI) += pci_bridge_dev.o
common-obj-$(CONFIG_PCI) += ioh3420.o xio3130_upstream.o xio3130_downstream.o

129
hw/virtio-bus.c Normal file
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@ -0,0 +1,129 @@
/*
* 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/>.
*
*/
#include "hw.h"
#include "qemu/error-report.h"
#include "qdev.h"
#include "virtio-bus.h"
#include "virtio.h"
/* #define DEBUG_VIRTIO_BUS */
#ifdef DEBUG_VIRTIO_BUS
#define DPRINTF(fmt, ...) \
do { printf("virtio_bus: " fmt , ## __VA_ARGS__); } while (0)
#else
#define DPRINTF(fmt, ...) do { } while (0)
#endif
/* Plug the VirtIODevice */
int virtio_bus_plug_device(VirtIODevice *vdev)
{
DeviceState *qdev = DEVICE(vdev);
BusState *qbus = BUS(qdev_get_parent_bus(qdev));
VirtioBusState *bus = VIRTIO_BUS(qbus);
VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(bus);
DPRINTF("%s: plug device.\n", qbus->name);
bus->vdev = vdev;
/*
* The lines below will disappear when we drop VirtIOBindings, at the end
* of the series.
*/
bus->bindings.notify = klass->notify;
bus->bindings.save_config = klass->save_config;
bus->bindings.save_queue = klass->save_queue;
bus->bindings.load_config = klass->load_config;
bus->bindings.load_queue = klass->load_queue;
bus->bindings.load_done = klass->load_done;
bus->bindings.get_features = klass->get_features;
bus->bindings.query_guest_notifiers = klass->query_guest_notifiers;
bus->bindings.set_guest_notifiers = klass->set_guest_notifiers;
bus->bindings.set_host_notifier = klass->set_host_notifier;
bus->bindings.vmstate_change = klass->vmstate_change;
virtio_bind_device(bus->vdev, &bus->bindings, qbus->parent);
if (klass->device_plugged != NULL) {
klass->device_plugged(qbus->parent);
}
return 0;
}
/* Reset the virtio_bus */
void virtio_bus_reset(VirtioBusState *bus)
{
DPRINTF("%s: reset device.\n", qbus->name);
if (bus->vdev != NULL) {
virtio_reset(bus->vdev);
}
}
/* Destroy the VirtIODevice */
void virtio_bus_destroy_device(VirtioBusState *bus)
{
DeviceState *qdev;
BusState *qbus = BUS(bus);
VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(bus);
DPRINTF("%s: remove device.\n", qbus->name);
if (bus->vdev != NULL) {
if (klass->device_unplug != NULL) {
klass->device_unplug(qbus->parent);
}
qdev = DEVICE(bus->vdev);
qdev_free(qdev);
bus->vdev = NULL;
}
}
/* Get the device id of the plugged device. */
uint16_t virtio_bus_get_vdev_id(VirtioBusState *bus)
{
assert(bus->vdev != NULL);
return bus->vdev->device_id;
}
/* Get the config_len field of the plugged device. */
size_t virtio_bus_get_vdev_config_len(VirtioBusState *bus)
{
assert(bus->vdev != NULL);
return bus->vdev->config_len;
}
static const TypeInfo virtio_bus_info = {
.name = TYPE_VIRTIO_BUS,
.parent = TYPE_BUS,
.instance_size = sizeof(VirtioBusState),
.abstract = true,
.class_size = sizeof(VirtioBusClass),
};
static void virtio_register_types(void)
{
type_register_static(&virtio_bus_info);
}
type_init(virtio_register_types)

87
hw/virtio-bus.h Normal file
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@ -0,0 +1,87 @@
/*
* 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 "qdev.h"
#include "sysemu/sysemu.h"
#include "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_unplug)(DeviceState *d);
} VirtioBusClass;
struct VirtioBusState {
BusState parent_obj;
/*
* Only one VirtIODevice can be plugged on the bus.
*/
VirtIODevice *vdev;
/*
* This will be removed at the end of the series.
*/
VirtIOBindings bindings;
};
int virtio_bus_plug_device(VirtIODevice *vdev);
void virtio_bus_reset(VirtioBusState *bus);
void virtio_bus_destroy_device(VirtioBusState *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);
#endif /* VIRTIO_BUS_H */