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-rw-r--r--hw/virtio-bus.c35
-rw-r--r--hw/virtio-bus.h7
-rw-r--r--hw/virtio.c70
-rw-r--r--hw/virtio.h30
4 files changed, 130 insertions, 12 deletions
diff --git a/hw/virtio-bus.c b/hw/virtio-bus.c
index b8f656e4ef..6045d8ad86 100644
--- a/hw/virtio-bus.c
+++ b/hw/virtio-bus.c
@@ -113,6 +113,41 @@ size_t virtio_bus_get_vdev_config_len(VirtioBusState *bus)
return bus->vdev->config_len;
}
+/* Get the features of the plugged device. */
+uint32_t virtio_bus_get_vdev_features(VirtioBusState *bus,
+ uint32_t requested_features)
+{
+ VirtioDeviceClass *k;
+ assert(bus->vdev != NULL);
+ k = VIRTIO_DEVICE_GET_CLASS(bus->vdev);
+ assert(k->get_features != NULL);
+ return k->get_features(bus->vdev, requested_features);
+}
+
+/* Get bad features of the plugged device. */
+uint32_t virtio_bus_get_vdev_bad_features(VirtioBusState *bus)
+{
+ VirtioDeviceClass *k;
+ assert(bus->vdev != NULL);
+ k = VIRTIO_DEVICE_GET_CLASS(bus->vdev);
+ if (k->bad_features != NULL) {
+ return k->bad_features(bus->vdev);
+ } else {
+ return 0;
+ }
+}
+
+/* Get config of the plugged device. */
+void virtio_bus_get_vdev_config(VirtioBusState *bus, uint8_t *config)
+{
+ VirtioDeviceClass *k;
+ assert(bus->vdev != NULL);
+ k = VIRTIO_DEVICE_GET_CLASS(bus->vdev);
+ if (k->get_config != NULL) {
+ k->get_config(bus->vdev, config);
+ }
+}
+
static const TypeInfo virtio_bus_info = {
.name = TYPE_VIRTIO_BUS,
.parent = TYPE_BUS,
diff --git a/hw/virtio-bus.h b/hw/virtio-bus.h
index f3788970b2..7584a0e6ae 100644
--- a/hw/virtio-bus.h
+++ b/hw/virtio-bus.h
@@ -83,5 +83,12 @@ void virtio_bus_destroy_device(VirtioBusState *bus);
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);
+/* Get the features of the plugged device. */
+uint32_t virtio_bus_get_vdev_features(VirtioBusState *bus,
+ uint32_t requested_features);
+/* Get bad features of the plugged device. */
+uint32_t virtio_bus_get_vdev_bad_features(VirtioBusState *bus);
+/* Get config of the plugged device. */
+void virtio_bus_get_vdev_config(VirtioBusState *bus, uint8_t *config);
#endif /* VIRTIO_BUS_H */
diff --git a/hw/virtio.c b/hw/virtio.c
index 77b53a9c21..ca170c319e 100644
--- a/hw/virtio.c
+++ b/hw/virtio.c
@@ -17,6 +17,7 @@
#include "qemu/error-report.h"
#include "virtio.h"
#include "qemu/atomic.h"
+#include "virtio-bus.h"
/* The alignment to use between consumer and producer parts of vring.
* x86 pagesize again. */
@@ -875,11 +876,16 @@ int virtio_load(VirtIODevice *vdev, QEMUFile *f)
return 0;
}
-void virtio_cleanup(VirtIODevice *vdev)
+void virtio_common_cleanup(VirtIODevice *vdev)
{
qemu_del_vm_change_state_handler(vdev->vmstate);
g_free(vdev->config);
g_free(vdev->vq);
+}
+
+void virtio_cleanup(VirtIODevice *vdev)
+{
+ virtio_common_cleanup(vdev);
g_free(vdev);
}
@@ -902,14 +908,10 @@ static void virtio_vmstate_change(void *opaque, int running, RunState state)
}
}
-VirtIODevice *virtio_common_init(const char *name, uint16_t device_id,
- size_t config_size, size_t struct_size)
+void virtio_init(VirtIODevice *vdev, const char *name,
+ uint16_t device_id, size_t config_size)
{
- VirtIODevice *vdev;
int i;
-
- vdev = g_malloc0(struct_size);
-
vdev->device_id = device_id;
vdev->status = 0;
vdev->isr = 0;
@@ -917,20 +919,28 @@ VirtIODevice *virtio_common_init(const char *name, uint16_t device_id,
vdev->config_vector = VIRTIO_NO_VECTOR;
vdev->vq = g_malloc0(sizeof(VirtQueue) * VIRTIO_PCI_QUEUE_MAX);
vdev->vm_running = runstate_is_running();
- for(i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++) {
+ for (i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++) {
vdev->vq[i].vector = VIRTIO_NO_VECTOR;
vdev->vq[i].vdev = vdev;
}
vdev->name = name;
vdev->config_len = config_size;
- if (vdev->config_len)
+ if (vdev->config_len) {
vdev->config = g_malloc0(config_size);
- else
+ } else {
vdev->config = NULL;
+ }
+ vdev->vmstate = qemu_add_vm_change_state_handler(virtio_vmstate_change,
+ vdev);
+}
- vdev->vmstate = qemu_add_vm_change_state_handler(virtio_vmstate_change, vdev);
-
+VirtIODevice *virtio_common_init(const char *name, uint16_t device_id,
+ size_t config_size, size_t struct_size)
+{
+ VirtIODevice *vdev;
+ vdev = g_malloc0(struct_size);
+ virtio_init(vdev, name, device_id, config_size);
return vdev;
}
@@ -1056,3 +1066,39 @@ EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq)
{
return &vq->host_notifier;
}
+
+static int virtio_device_init(DeviceState *qdev)
+{
+ VirtIODevice *vdev = VIRTIO_DEVICE(qdev);
+ VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(qdev);
+ assert(k->init != NULL);
+ if (k->init(vdev) < 0) {
+ return -1;
+ }
+ virtio_bus_plug_device(vdev);
+ return 0;
+}
+
+static void virtio_device_class_init(ObjectClass *klass, void *data)
+{
+ /* Set the default value here. */
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ dc->init = virtio_device_init;
+ dc->bus_type = TYPE_VIRTIO_BUS;
+}
+
+static const TypeInfo virtio_device_info = {
+ .name = TYPE_VIRTIO_DEVICE,
+ .parent = TYPE_DEVICE,
+ .instance_size = sizeof(VirtIODevice),
+ .class_init = virtio_device_class_init,
+ .abstract = true,
+ .class_size = sizeof(VirtioDeviceClass),
+};
+
+static void virtio_register_types(void)
+{
+ type_register_static(&virtio_device_info);
+}
+
+type_init(virtio_register_types)
diff --git a/hw/virtio.h b/hw/virtio.h
index b9f1873fd6..9cc7b85671 100644
--- a/hw/virtio.h
+++ b/hw/virtio.h
@@ -108,8 +108,17 @@ typedef struct {
#define VIRTIO_NO_VECTOR 0xffff
+#define TYPE_VIRTIO_DEVICE "virtio-device"
+#define VIRTIO_DEVICE_GET_CLASS(obj) \
+ OBJECT_GET_CLASS(VirtioDeviceClass, obj, TYPE_VIRTIO_DEVICE)
+#define VIRTIO_DEVICE_CLASS(klass) \
+ OBJECT_CLASS_CHECK(VirtioDeviceClass, klass, TYPE_VIRTIO_DEVICE)
+#define VIRTIO_DEVICE(obj) \
+ OBJECT_CHECK(VirtIODevice, (obj), TYPE_VIRTIO_DEVICE)
+
struct VirtIODevice
{
+ DeviceState parent_obj;
const char *name;
uint8_t status;
uint8_t isr;
@@ -119,6 +128,10 @@ struct VirtIODevice
void *config;
uint16_t config_vector;
int nvectors;
+ /*
+ * Function pointers will be removed at the end of the series as they are in
+ * VirtioDeviceClass.
+ */
uint32_t (*get_features)(VirtIODevice *vdev, uint32_t requested_features);
uint32_t (*bad_features)(VirtIODevice *vdev);
void (*set_features)(VirtIODevice *vdev, uint32_t val);
@@ -147,6 +160,23 @@ struct VirtIODevice
VMChangeStateEntry *vmstate;
};
+typedef struct VirtioDeviceClass {
+ /* This is what a VirtioDevice must implement */
+ DeviceClass parent;
+ int (*init)(VirtIODevice *vdev);
+ uint32_t (*get_features)(VirtIODevice *vdev, uint32_t requested_features);
+ uint32_t (*bad_features)(VirtIODevice *vdev);
+ void (*set_features)(VirtIODevice *vdev, uint32_t val);
+ void (*get_config)(VirtIODevice *vdev, uint8_t *config);
+ void (*set_config)(VirtIODevice *vdev, const uint8_t *config);
+ void (*reset)(VirtIODevice *vdev);
+ void (*set_status)(VirtIODevice *vdev, uint8_t val);
+} VirtioDeviceClass;
+
+void virtio_init(VirtIODevice *vdev, const char *name,
+ uint16_t device_id, size_t config_size);
+void virtio_common_cleanup(VirtIODevice *vdev);
+
VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,
void (*handle_output)(VirtIODevice *,
VirtQueue *));
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-24 09:25:19 +0000