linux-kernel - [PATCH 3/4] dma-buf: add support for mapping with dma mapping attributes

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Message-Id: <1547836667-13695-4-git-send-email-lmark@codeaurora.org>
Date:   Fri, 18 Jan 2019 10:37:46 -0800
From:   Liam Mark <lmark@...eaurora.org>
To:     labbott@...hat.com, sumit.semwal@...aro.org
Cc:     arve@...roid.com, tkjos@...roid.com, maco@...roid.com,
        joel@...lfernandes.org, christian@...uner.io,
        devel@...verdev.osuosl.org, dri-devel@...ts.freedesktop.org,
        linaro-mm-sig@...ts.linaro.org, linux-kernel@...r.kernel.org,
        afd@...com, john.stultz@...aro.org,
        Liam Mark <lmark@...eaurora.org>
Subject: [PATCH 3/4] dma-buf: add support for mapping with dma mapping attributes

Add support for configuring dma mapping attributes when mapping
and unmapping memory through dma_buf_map_attachment and
dma_buf_unmap_attachment.

Signed-off-by: Liam Mark <lmark@...eaurora.org>
---
 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 58725f890b5b..59bf33e09e2d 100644
--- a/include/linux/dma-buf.h
+++ b/include/linux/dma-buf.h
@@ -308,6 +308,8 @@ struct dma_buf {
  * @dev: device attached to the buffer.
  * @node: list of dma_buf_attachment.
  * @priv: exporter specific attachment data.
+ * @dma_map_attrs: DMA mapping attributes to be used in
+ *		   dma_buf_map_attachment() and dma_buf_unmap_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
@@ -323,6 +325,7 @@ struct dma_buf_attachment {
 	struct device *dev;
 	struct list_head node;
 	void *priv;
+	unsigned long dma_map_attrs;
 };
 
 /**
-- 
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