From: KONRAD Frederic <fred.kon...@greensocs.com>
Create the virtio-pci device. This transport device will create a
virtio-pci-bus, so one VirtIODevice can be connected.
Signed-off-by: KONRAD Frederic <fred.kon...@greensocs.com>
---
hw/virtio-pci.c | 112 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
hw/virtio-pci.h | 14 +++++++
2 files changed, 126 insertions(+)
diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c
index 5ac8d0d..ff0b5f1 100644
--- a/hw/virtio-pci.c
+++ b/hw/virtio-pci.c
@@ -1119,6 +1119,115 @@ static TypeInfo virtio_scsi_info = {
.class_init = virtio_scsi_class_init,
};
+/*
+ * virtio-pci : This is the PCIDevice which have a virtio-pci-bus.
+ */
+
+/* This is called by virtio-bus just after the device is plugged. */
+static void virtio_pci_device_plugged(void *opaque)
+{
+ VirtIOPCIProxy *proxy = VIRTIO_PCI(opaque);
+ uint8_t *config;
+ uint32_t size;
+
+ /* Put the PCI IDs */
+ switch (get_virtio_device_id(proxy->bus)) {
+
+ case VIRTIO_ID_BLOCK:
+ pci_config_set_device_id(proxy->pci_dev.config,
+ PCI_DEVICE_ID_VIRTIO_BLOCK);
+ pci_config_set_class(proxy->pci_dev.config, PCI_CLASS_STORAGE_SCSI);
+ break;
+ default:
+ error_report("unknown device id\n");
+ break;
+
+ }
+
+ /* TODO: vdev should be accessed through virtio-bus functions. */
+ proxy->vdev = proxy->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, get_virtio_device_id(proxy->bus));
+ config[PCI_INTERRUPT_PIN] = 1;
+
+ if (proxy->bus->vdev->nvectors &&
+ msix_init_exclusive_bar(&proxy->pci_dev, proxy->bus->vdev->nvectors,
+ 1)) {
+ proxy->bus->vdev->nvectors = 0;
+ }
+
+ proxy->pci_dev.config_write = virtio_write_config;
+
+ size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev)
+ + proxy->bus->vdev->config_len;
+ 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 = proxy->bus->vdev->get_features(proxy->bus->vdev,
+
proxy->host_features);
+}
+
+/* This is called by virtio-bus just before the device is unplugged. */
+static void virtio_pci_device_unplug(void *opaque)
+{
+ VirtIOPCIProxy *dev = VIRTIO_PCI(opaque);
+ virtio_pci_stop_ioeventfd(dev);
+}
+
+static int virtio_pci_init(PCIDevice *pci_dev)
+{
+ VirtIOPCIProxy *dev = VIRTIO_PCI(pci_dev);
+ dev->bus = virtio_pci_bus_new(dev);
+ return 0;
+}
+
+static void virtio_pci_exit(PCIDevice *pci_dev)
+{
+ DeviceState *qdev = DEVICE(pci_dev);
+ BusState *qbus = BUS(qdev_get_parent_bus(qdev));
+ VirtioBusState *bus = VIRTIO_BUS(qbus);
+ virtio_bus_destroy_device(bus);
+ qbus_free(qbus);
+}
+
+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_reset;
+}
+
+static const TypeInfo virtio_pci_info = {
+ .name = TYPE_VIRTIO_PCI,
+ .parent = TYPE_PCI_DEVICE,
+ .instance_size = sizeof(VirtIOPCIProxy),
+ .class_init = virtio_pci_class_init,
+};
+
/* virtio-pci-bus */
VirtioBusState *virtio_pci_bus_new(VirtIOPCIProxy *dev)
@@ -1145,6 +1254,8 @@ 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 = {
@@ -1163,6 +1274,7 @@ 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)
diff --git a/hw/virtio-pci.h b/hw/virtio-pci.h
index 0e3288e..2c31b7a 100644
--- a/hw/virtio-pci.h
+++ b/hw/virtio-pci.h
@@ -46,6 +46,17 @@ typedef struct {
unsigned int users;
} VirtIOIRQFD;
+/*
+ * virtio-pci : This is the PCIDevice which have 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)
+
struct VirtIOPCIProxy {
PCIDevice pci_dev;
VirtIODevice *vdev;
@@ -66,6 +77,9 @@ struct VirtIOPCIProxy {
bool ioeventfd_disabled;
bool ioeventfd_started;
VirtIOIRQFD *vector_irqfd;
+ /* That's the virtio-bus on which VirtioDevice will be connected. */
+ VirtioBusState *bus;
+ /* Nothing more for the moment. */
};
void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev);
--
1.7.11.7
