Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit f57c5b53 authored by Isaac J. Manjarres's avatar Isaac J. Manjarres Committed by Sandeep Patil
Browse files

ANDROID: dma-buf: Add support for mapping buffers with DMA attributes 



When mapping the memory represented by a dma-buf into a device's
address space, it might be desireable to map the memory with
certain DMA attributes. Thus, introduce the dma_mapping_attrs
field in the dma_buf_attachment structure so that when
the memory is mapped with dma_buf_map_attachment, it is mapped
with the desired DMA attributes.

Bug: 133508579
Test: ion-unit-tests
Change-Id: Ib2e5bafdc02ae31a58ce96a82d77cc508dd71bd4
Signed-off-by: default avatarIsaac J. Manjarres <isaacm@codeaurora.org>
Signed-off-by: default avatarSandeep Patil <sspatil@google.com>
parent 36b51b44

include/linux/dma-buf.h

+3 −0
Original line number Diff line number Diff line
@@ -384,6 +384,8 @@ struct dma_buf { 
 * @sgt: cached mapping.

 * @dir: direction of cached mapping.

 * @priv: exporter specific attachment data.

 * @dma_map_attrs: DMA attributes to be used when the exporter maps the buffer

 * through dma_buf_map_attachment.

 *

 * This structure holds the attachment information between the dma_buf buffer

 * and its user device(s). The list contains one attachment struct per device
@@ -401,6 +403,7 @@ struct dma_buf_attachment { 
	struct sg_table *sgt;

	enum dma_data_direction dir;

	void *priv;

	unsigned long dma_map_attrs;

};



/**