video: tegra: nvmap: Export dmabuf for all handles

Export a dma_buf object for all handles during allocation. Ref counting
for the underlying dma_buf follows the creation of nvmap_handle_refs.

Bug 1290869

Change-Id: I738e83ccd5063f6eb14b1baaa24868f6a19a572e
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Signed-off-by: Krishna Reddy <vdumpa@nvidia.com>
Reviewed-on: http://git-master/r/264089
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Hiroshi Doyu <hdoyu@nvidia.com>
GVS: Gerrit_Virtual_Submit

1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/nvmap.h b/include/linux/nvmap.h
index 224c554fa..3590e9e21 100644
--- a/include/linux/nvmap.h
+++ b/include/linux/nvmap.h
@@ -87,6 +87,10 @@ struct nvmap_handle_ref *nvmap_alloc(struct nvmap_client *client, size_t size,
                                      size_t align, unsigned int flags,
                                      unsigned int heap_mask);
 
+struct dma_buf *nvmap_get_dmabuf(struct nvmap_client *client, ulong user_id);
+
+struct dma_buf *nvmap_get_dmabuf_from_ref(struct nvmap_handle_ref *ref);
+
 ulong nvmap_ref_to_user_id(struct nvmap_handle_ref *ref);
 
 phys_addr_t nvmap_get_addr_from_user_id(ulong user_id);