[RFC,v1,3/4] drm/virtio: Add VIRTIO_GPU_CMD_RESOURCE_OUT_FENCE cmd

Commit Message

Kasireddy, Vivek July 29, 2021, 8:16 a.m. UTC

This implements the hypercall interface for the resource_out_fence
command.

Cc: Gerd Hoffmann <[e-mail]>
Signed-off-by: Vivek Kasireddy <[e-mail]>
---
 drivers/gpu/drm/virtio/virtgpu_drv.h |  4 ++++
 drivers/gpu/drm/virtio/virtgpu_vq.c  | 17 +++++++++++++++++
 2 files changed, 21 insertions(+)

Patch

diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h
index d4e610a44e12..3c43856d4768 100644
--- a/drivers/gpu/drm/virtio/virtgpu_drv.h
+++ b/drivers/gpu/drm/virtio/virtgpu_drv.h
@@ -405,6 +405,10 @@  virtio_gpu_cmd_set_scanout_blob(struct virtio_gpu_device *vgdev,
 				struct drm_framebuffer *fb,
 				uint32_t width, uint32_t height,
 				uint32_t x, uint32_t y);
+void virtio_gpu_cmd_resource_out_fence(struct virtio_gpu_device *vgdev,
+				       struct virtio_gpu_object_array *objs,
+				       struct virtio_gpu_fence *fence);
+
 
 /* virtgpu_display.c */
 int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev);
diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c
index 2e71e91278b4..08e580d02c56 100644
--- a/drivers/gpu/drm/virtio/virtgpu_vq.c
+++ b/drivers/gpu/drm/virtio/virtgpu_vq.c
@@ -1310,3 +1310,20 @@  void virtio_gpu_cmd_set_scanout_blob(struct virtio_gpu_device *vgdev,
 
 	virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
 }
+
+void virtio_gpu_cmd_resource_out_fence(struct virtio_gpu_device *vgdev,
+				       struct virtio_gpu_object_array *objs,
+				       struct virtio_gpu_fence *fence)
+{
+	struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(objs->objs[0]);
+	struct virtio_gpu_resource_out_fence *cmd_p;
+	struct virtio_gpu_vbuffer *vbuf;
+
+	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
+	memset(cmd_p, 0, sizeof(*cmd_p));
+	vbuf->objs = objs;
+
+	cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_OUT_FENCE);
+	cmd_p->resource_id = cpu_to_le32(bo->hw_res_handle);
+	virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence);
+}