Applied kds patches into dma_buf

1 files changed, 17 insertions, 0 deletions

diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h
index dfac5ed3112..0c781c9308f 100644
--- a/include/linux/dma-buf.h
+++ b/include/linux/dma-buf.h
@@ -30,6 +30,7 @@
 #include <linux/list.h>
 #include <linux/dma-mapping.h>
 #include <linux/fs.h>
+#include <linux/kds.h>
 
 struct device;
 struct dma_buf;
@@ -127,6 +128,7 @@ struct dma_buf {
 	void *vmap_ptr;
 	const char *exp_name;
 	struct list_head list_node;
+	struct kds_resource kds;
 	void *priv;
 };
 
@@ -162,6 +164,21 @@ static inline void get_dma_buf(struct dma_buf *dmabuf)
 	get_file(dmabuf->file);
 }
 
+/**
+ * get_dma_buf_kds_resource - get a KDS resource for this dma-buf
+ * @dmabuf:    [in]    pointer to dma_buf
+ *
+ * Returns a KDS resource that represents the dma-buf. This should be used by
+ * drivers to synchronize access to the buffer. Note that the caller should
+ * ensure that a reference to the dma-buf exists from the call to
+ * kds_async_wait until kds_resource_set_release is called.
+ */
+static inline struct kds_resource *
+	get_dma_buf_kds_resource(struct dma_buf *dmabuf)
+{
+   return &dmabuf->kds;
+}
+
 struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf,
 							struct device *dev);
 void dma_buf_detach(struct dma_buf *dmabuf,