| From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 |
| From: "Isaac J. Manjarres" <isaacm@codeaurora.org> |
| Date: Wed, 19 Jun 2019 15:37:13 -0700 |
| Subject: 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: Isaac J. Manjarres <isaacm@codeaurora.org> |
| Signed-off-by: Sandeep Patil <sspatil@google.com> |
| --- |
| include/linux/dma-buf.h | 3 +++ |
| 1 file changed, 3 insertions(+) |
| |
| diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h |
| index b1457e6b76d8..0458da673ec5 100644 |
| --- a/include/linux/dma-buf.h |
| +++ b/include/linux/dma-buf.h |
| @@ -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; |
| }; |
| |
| /** |
