minigbm: add buffer invalidation function
We may need to invalidate a buffer before reading it. Some use
cases are:
- DRM_IOCTL_I915_GEM_SET_DOMAIN
- DMA_BUF_IOCTL_SYNC with the SYNC_START option
- DRM_IOCTL_VIRTGPU_TRANSFER_FROM_HOST
This patch adds the function hook.
BUG=chromium:764871
TEST=compiles
Change-Id: I85811407252b859a12294381c65ff3545424636b
Reviewed-on: https://chromium-review.googlesource.com/710322
Commit-Ready: Gurchetan Singh <gurchetansingh@chromium.org>
Tested-by: Gurchetan Singh <gurchetansingh@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
diff --git a/drv.h b/drv.h
index e62d164..7abaf79 100644
--- a/drv.h
+++ b/drv.h
@@ -115,6 +115,8 @@
int drv_bo_unmap(struct bo *bo, struct map_info *data);
+int drv_bo_invalidate(struct bo *bo, struct map_info *data);
+
int drv_bo_flush(struct bo *bo, struct map_info *data);
uint32_t drv_bo_get_width(struct bo *bo);