[PATCH v4 11/13] drm/vboxvideo: Use drm_gem_vram_vmap_local() in cursor update

Thomas Zimmermann
2021-01-08T09:43:38Z

Cursor updates in vboxvideo require a short-term mapping of the
source BO. Use drm_gem_vram_vmap_local() and avoid the pinning
operations.

Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
---
 drivers/gpu/drm/vboxvideo/vbox_mode.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/vboxvideo/vbox_mode.c
b/drivers/gpu/drm/vboxvideo/vbox_mode.c
index dbc0dd53c69e..215b37c78c10 100644
--- a/drivers/gpu/drm/vboxvideo/vbox_mode.c
+++ b/drivers/gpu/drm/vboxvideo/vbox_mode.c
@@ -381,7 +381,8 @@ static void vbox_cursor_atomic_update(struct drm_plane
*plane,
 		container_of(plane->dev, struct vbox_private, ddev);
 	struct vbox_crtc *vbox_crtc = to_vbox_crtc(plane->state->crtc);
 	struct drm_framebuffer *fb = plane->state->fb;
-	struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(fb->obj[0]);
+	struct drm_gem_object *obj = fb->obj[0];
+	struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(obj);
 	u32 width = plane->state->crtc_w;
 	u32 height = plane->state->crtc_h;
 	size_t data_size, mask_size;
@@ -401,11 +402,12 @@ static void vbox_cursor_atomic_update(struct drm_plane
*plane,

 	vbox_crtc->cursor_enabled = true;

-	ret = drm_gem_vram_vmap(gbo, &map);
+	ret = dma_resv_lock(obj->resv, NULL);
+	if (ret)
+		return;
+	ret = drm_gem_vram_vmap_local(gbo, &map);
 	if (ret) {
-		/*
-		 * BUG: we should have pinned the BO in prepare_fb().
-		 */
+		dma_resv_unlock(obj->resv);
 		mutex_unlock(&vbox->hw_mutex);
 		DRM_WARN("Could not map cursor bo, skipping update\n");
 		return;
@@ -421,7 +423,8 @@ static void vbox_cursor_atomic_update(struct drm_plane
*plane,
 	data_size = width * height * 4 + mask_size;

 	copy_cursor_image(src, vbox->cursor_data, width, height, mask_size);
-	drm_gem_vram_vunmap(gbo, &map);
+	drm_gem_vram_vunmap_local(gbo, &map);
+	dma_resv_unlock(obj->resv);

 	flags = VBOX_MOUSE_POINTER_VISIBLE | VBOX_MOUSE_POINTER_SHAPE |
 		VBOX_MOUSE_POINTER_ALPHA;
--
2.29.2