minigbm: Add mmap() in backends

Gralloc requires the ability to mmap a buffer into userspace. This
change adds the necessary entry points to our internal "drv"
interface.

BUG=chromium:616275
TEST=minigbm still builds.  Also ran:

./gralloctest mapping

with CL:362062 applied on minnie and cyan (decided to split that CL
into smaller patches).

CQ-DEPEND=CL:366041

Change-Id: I7396b0c79702f24eb779984805bc679c237bd932
Reviewed-on: https://chromium-review.googlesource.com/370798
Commit-Ready: Gurchetan Singh <gurchetansingh@chromium.org>
Tested-by: Gurchetan Singh <gurchetansingh@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/drv.h b/drv.h
index 2b523e0..bc2d421 100644
--- a/drv.h
+++ b/drv.h
@@ -145,6 +145,12 @@ drv_bo_create(struct driver *drv, uint32_t width, uint32_t height,
 void
 drv_bo_destroy(struct bo *bo);
 
+void *
+drv_bo_map(struct bo *bo);
+
+int
+drv_bo_unmap(struct bo *bo);
+
 struct bo *
 drv_bo_import(struct driver *drv, struct drv_import_fd_data *data);