[Qemu-devel] [PATCH 16/18] virtio-gpu: use virgl thread sync with the data-plane

[Marc-André Lureau]

Let's not use a timer but rather an additional thread to wait for sync.

Signed-off-by: Marc-André Lureau <marcandre.lur...@redhat.com>
---
 hw/display/virtio-gpu-3d.c | 22 +++++++++++++++++++---
 hw/display/virtio-gpu.c    |  2 +-
 2 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/hw/display/virtio-gpu-3d.c b/hw/display/virtio-gpu-3d.c
index 728c940..42e62a8 100644
--- a/hw/display/virtio-gpu-3d.c
+++ b/hw/display/virtio-gpu-3d.c
@@ -773,17 +773,33 @@ void virtio_gpu_virgl_dp_destroy(VirtIOGPU *g)
     g_free(dp);
 }
 
+static void render_poll_handler(void *opaque)
+{
+    virgl_renderer_poll();
+}
+
 int virtio_gpu_virgl_init(VirtIOGPU *g)
 {
     int ret;
+    int flags = 0;
+
+    if (VIRTIO_GPU_DATA_PLANE_OK(g->dp)) {
+        flags |= VIRGL_RENDERER_THREAD_SYNC;
+    }
 
-    ret = virgl_renderer_init(g, 0, &virtio_gpu_3d_cbs);
+    ret = virgl_renderer_init(g, flags, &virtio_gpu_3d_cbs);
     if (ret != 0) {
         return ret;
     }
 
-    g->fence_poll = timer_new_ms(QEMU_CLOCK_VIRTUAL,
-                                 virtio_gpu_fence_poll, g);
+    if (VIRTIO_GPU_DATA_PLANE_OK(g->dp)) {
+        aio_set_fd_handler(iothread_get_aio_context(g->iothread),
+                           virgl_renderer_get_poll_fd(),
+                           false, render_poll_handler, NULL, g);
+    } else {
+        g->fence_poll = timer_new_ms(QEMU_CLOCK_VIRTUAL,
+                                     virtio_gpu_fence_poll, g);
+    }
 
     if (virtio_gpu_stats_enabled(g->conf)) {
         g->print_stats = timer_new_ms(QEMU_CLOCK_VIRTUAL,
diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index 34d4a92..45fc018 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -897,7 +897,7 @@ static void virtio_gpu_handle_ctrl(VirtIODevice *vdev, 
VirtQueue *vq)
     virtio_gpu_process_cmdq(g);
 
 #ifdef CONFIG_VIRGL
-    if (g->use_virgl_renderer) {
+    if (g->use_virgl_renderer && !VIRTIO_GPU_DATA_PLANE_OK(g->dp)) {
         virtio_gpu_virgl_fence_poll(g);
     }
 #endif
-- 
2.9.0