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virtio-pci: refactor virtio-pci device. 

Create the virtio-pci device which is abstract. This transport device will
create a virtio-pci-bus, so one VirtIODevice can be connected.

Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
KONRAD Frederic 2013-01-15 00:08:04 +01:00 committed by Anthony Liguori
parent 0a2acf5eb3
commit 085bccb72c
2 changed files with 139 additions and 2 deletions
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118
hw/virtio-pci.c
View File

@ -1312,6 +1312,121 @@ static const TypeInfo virtio_scsi_info = {
.class_init = virtio_scsi_class_init,
};
/*
* virtio-pci: This is the PCIDevice which has a virtio-pci-bus.
*/
/* This is called by virtio-bus just after the device is plugged. */
static void virtio_pci_device_plugged(DeviceState *d)
{
VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
VirtioBusState *bus = &proxy->bus;
uint8_t *config;
uint32_t size;
proxy->vdev = bus->vdev;
config = proxy->pci_dev.config;
if (proxy->class_code) {
pci_config_set_class(config, proxy->class_code);
}
pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID,
pci_get_word(config + PCI_VENDOR_ID));
pci_set_word(config + PCI_SUBSYSTEM_ID, virtio_bus_get_vdev_id(bus));
config[PCI_INTERRUPT_PIN] = 1;
if (proxy->nvectors &&
msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors, 1)) {
proxy->nvectors = 0;
}
proxy->pci_dev.config_write = virtio_write_config;
size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev)
+ virtio_bus_get_vdev_config_len(bus);
if (size & (size - 1)) {
size = 1 << qemu_fls(size);
}
memory_region_init_io(&proxy->bar, &virtio_pci_config_ops, proxy,
"virtio-pci", size);
pci_register_bar(&proxy->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO,
&proxy->bar);
if (!kvm_has_many_ioeventfds()) {
proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD;
}
proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE;
proxy->host_features = virtio_bus_get_vdev_features(bus,
proxy->host_features);
}
/* This is called by virtio-bus just before the device is unplugged. */
static void virtio_pci_device_unplug(DeviceState *d)
{
VirtIOPCIProxy *dev = VIRTIO_PCI(d);
virtio_pci_stop_ioeventfd(dev);
}
static int virtio_pci_init(PCIDevice *pci_dev)
{
VirtIOPCIProxy *dev = VIRTIO_PCI(pci_dev);
VirtioPCIClass *k = VIRTIO_PCI_GET_CLASS(pci_dev);
virtio_pci_bus_new(&dev->bus, dev);
if (k->init != NULL) {
return k->init(dev);
}
return 0;
}
static void virtio_pci_exit(PCIDevice *pci_dev)
{
VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev);
VirtioBusState *bus = VIRTIO_BUS(&proxy->bus);
BusState *qbus = BUS(&proxy->bus);
virtio_bus_destroy_device(bus);
qbus_free(qbus);
virtio_exit_pci(pci_dev);
}
/*
* This will be renamed virtio_pci_reset at the end of the series.
* virtio_pci_reset is still in use at this moment.
*/
static void virtio_pci_rst(DeviceState *qdev)
{
VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev);
VirtioBusState *bus = VIRTIO_BUS(&proxy->bus);
virtio_pci_stop_ioeventfd(proxy);
virtio_bus_reset(bus);
msix_unuse_all_vectors(&proxy->pci_dev);
proxy->flags &= ~VIRTIO_PCI_FLAG_BUS_MASTER_BUG;
}
static void virtio_pci_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
k->init = virtio_pci_init;
k->exit = virtio_pci_exit;
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
k->revision = VIRTIO_PCI_ABI_VERSION;
k->class_id = PCI_CLASS_OTHERS;
dc->reset = virtio_pci_rst;
}
static const TypeInfo virtio_pci_info = {
.name = TYPE_VIRTIO_PCI,
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(VirtIOPCIProxy),
.class_init = virtio_pci_class_init,
.class_size = sizeof(VirtioPCIClass),
.abstract = true,
};
/* virtio-pci-bus */
void virtio_pci_bus_new(VirtioBusState *bus, VirtIOPCIProxy *dev)
@ -1338,6 +1453,8 @@ static void virtio_pci_bus_class_init(ObjectClass *klass, void *data)
k->set_host_notifier = virtio_pci_set_host_notifier;
k->set_guest_notifiers = virtio_pci_set_guest_notifiers;
k->vmstate_change = virtio_pci_vmstate_change;
k->device_plugged = virtio_pci_device_plugged;
k->device_unplug = virtio_pci_device_unplug;
}
static const TypeInfo virtio_pci_bus_info = {
@ -1356,6 +1473,7 @@ static void virtio_pci_register_types(void)
type_register_static(&virtio_scsi_info);
type_register_static(&virtio_rng_info);
type_register_static(&virtio_pci_bus_info);
type_register_static(&virtio_pci_info);
}
type_init(virtio_pci_register_types)

23
hw/virtio-pci.h
View File

@ -23,6 +23,8 @@
#include "virtio-scsi.h"
#include "virtio-bus.h"
typedef struct VirtIOPCIProxy VirtIOPCIProxy;
/* virtio-pci-bus */
typedef struct VirtioBusState VirtioPCIBusState;
@ -47,7 +49,23 @@ typedef struct {
unsigned int users;
} VirtIOIRQFD;
typedef struct {
/*
* virtio-pci: This is the PCIDevice which has a virtio-pci-bus.
*/
#define TYPE_VIRTIO_PCI "virtio-pci"
#define VIRTIO_PCI_GET_CLASS(obj) \
OBJECT_GET_CLASS(VirtioPCIClass, obj, TYPE_VIRTIO_PCI)
#define VIRTIO_PCI_CLASS(klass) \
OBJECT_CLASS_CHECK(VirtioPCIClass, klass, TYPE_VIRTIO_PCI)
#define VIRTIO_PCI(obj) \
OBJECT_CHECK(VirtIOPCIProxy, (obj), TYPE_VIRTIO_PCI)
typedef struct VirtioPCIClass {
PCIDeviceClass parent_class;
int (*init)(VirtIOPCIProxy *vpci_dev);
} VirtioPCIClass;
struct VirtIOPCIProxy {
PCIDevice pci_dev;
VirtIODevice *vdev;
MemoryRegion bar;
@ -68,7 +86,8 @@ typedef struct {
bool ioeventfd_started;
VirtIOIRQFD *vector_irqfd;
int nvqs_with_notifiers;
} VirtIOPCIProxy;
VirtioBusState bus;
};
void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev);
void virtio_pci_reset(DeviceState *d);