virtio-gpu: split virtio-gpu, introduce virtio-gpu-base

Add a base class that is common to virtio-gpu and vhost-user-gpu
devices.

The VirtIOGPUBase base class provides common functionalities necessary
for both virtio-gpu and vhost-user-gpu:
- common configuration (max-outputs, initial resolution, flags)
- virtio device initialization, including queue setup
- device pre-conditions checks (iommu)
- migration blocker
- virtio device callbacks
- hooking up to qemu display subsystem
- a few common helper functions to reset the device, retrieve display
informations
- a class callback to unblock the rendering (for GL updates)

What is left to the virtio-gpu subdevice to take care of, in short,
are all the virtio queues handling, command processing and migration.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20190524130946.31736-8-marcandre.lureau@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

1 files changed, 7 insertions, 4 deletions

diff --git a/hw/display/virtio-vga.c b/hw/display/virtio-vga.c
index 5d57bf5b0c..a8138c0432 100644
--- a/hw/display/virtio-vga.c
+++ b/hw/display/virtio-vga.c
@@ -32,8 +32,9 @@ typedef struct VirtIOVGAClass {
 static void virtio_vga_invalidate_display(void *opaque)
 {
     VirtIOVGA *vvga = opaque;
+    VirtIOGPUBase *g = VIRTIO_GPU_BASE(&vvga->vdev);
 
-    if (vvga->vdev.enable) {
+    if (g->enable) {
         virtio_gpu_ops.invalidate(&vvga->vdev);
     } else {
         vvga->vga.hw_ops->invalidate(&vvga->vga);
@@ -43,8 +44,9 @@ static void virtio_vga_invalidate_display(void *opaque)
 static void virtio_vga_update_display(void *opaque)
 {
     VirtIOVGA *vvga = opaque;
+    VirtIOGPUBase *g = VIRTIO_GPU_BASE(&vvga->vdev);
 
-    if (vvga->vdev.enable) {
+    if (g->enable) {
         virtio_gpu_ops.gfx_update(&vvga->vdev);
     } else {
         vvga->vga.hw_ops->gfx_update(&vvga->vga);
@@ -54,8 +56,9 @@ static void virtio_vga_update_display(void *opaque)
 static void virtio_vga_text_update(void *opaque, console_ch_t *chardata)
 {
     VirtIOVGA *vvga = opaque;
+    VirtIOGPUBase *g = VIRTIO_GPU_BASE(&vvga->vdev);
 
-    if (vvga->vdev.enable) {
+    if (g->enable) {
         if (virtio_gpu_ops.text_update) {
             virtio_gpu_ops.text_update(&vvga->vdev, chardata);
         }
@@ -108,7 +111,7 @@ static const VMStateDescription vmstate_virtio_vga = {
 static void virtio_vga_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
 {
     VirtIOVGA *vvga = VIRTIO_VGA(vpci_dev);
-    VirtIOGPU *g = &vvga->vdev;
+    VirtIOGPUBase *g = VIRTIO_GPU_BASE(&vvga->vdev);
     VGACommonState *vga = &vvga->vga;
     Error *err = NULL;
     uint32_t offset;