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From: <guangming.cao@mediatek.com>
To: "Sumit Semwal" <sumit.semwal@linaro.org>,
	"Christian König" <christian.koenig@amd.com>,
	"Matthias Brugger" <matthias.bgg@gmail.com>
Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>,
	Liam Mark <lmark@codeaurora.org>,
	Laura Abbott <labbott@redhat.com>,
	Brian Starkey <Brian.Starkey@arm.com>,
	John Stultz <john.stultz@linaro.org>,
	<linux-media@vger.kernel.org>, <dri-devel@lists.freedesktop.org>,
	<linaro-mm-sig@lists.linaro.org>, <linux-kernel@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-mediatek@lists.infradead.org>,
	Guangming Cao <Guangming.Cao@mediatek.com>
Subject: [PATCH] dma-heap: Let dma heap use dma_map_attrs to map & unmap iova
Date: Thu, 8 Jul 2021 18:14:21 +0800	[thread overview]
Message-ID: <20210708101421.9101-1-guangming.cao@mediatek.com> (raw)

From: Guangming Cao <Guangming.Cao@mediatek.com>

For dma-heap users, they can't bypass cache sync when map/unmap iova
with dma heap. But they can do it by adding DMA_ATTR_SKIP_CPU_SYNC
into dma_alloc_attrs.

To keep alignment, at dma_heap side, also use
dma_buf_attachment.dma_map_attrs to do iova map & unmap.

Signed-off-by: Guangming Cao <Guangming.Cao@mediatek.com>
---
 drivers/dma-buf/heaps/cma_heap.c    | 6 ++++--
 drivers/dma-buf/heaps/system_heap.c | 6 ++++--
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/dma-buf/heaps/cma_heap.c b/drivers/dma-buf/heaps/cma_heap.c
index 0c05b79870f9..2c9feb3bfc3e 100644
--- a/drivers/dma-buf/heaps/cma_heap.c
+++ b/drivers/dma-buf/heaps/cma_heap.c
@@ -99,9 +99,10 @@ static struct sg_table *cma_heap_map_dma_buf(struct dma_buf_attachment *attachme
 {
 	struct dma_heap_attachment *a = attachment->priv;
 	struct sg_table *table = &a->table;
+	int attrs = attachment->dma_map_attrs;
 	int ret;
 
-	ret = dma_map_sgtable(attachment->dev, table, direction, 0);
+	ret = dma_map_sgtable(attachment->dev, table, direction, attrs);
 	if (ret)
 		return ERR_PTR(-ENOMEM);
 	a->mapped = true;
@@ -113,9 +114,10 @@ static void cma_heap_unmap_dma_buf(struct dma_buf_attachment *attachment,
 				   enum dma_data_direction direction)
 {
 	struct dma_heap_attachment *a = attachment->priv;
+	int attrs = attachment->dma_map_attrs;
 
 	a->mapped = false;
-	dma_unmap_sgtable(attachment->dev, table, direction, 0);
+	dma_unmap_sgtable(attachment->dev, table, direction, attrs);
 }
 
 static int cma_heap_dma_buf_begin_cpu_access(struct dma_buf *dmabuf,
diff --git a/drivers/dma-buf/heaps/system_heap.c b/drivers/dma-buf/heaps/system_heap.c
index 23a7e74ef966..fc7b1e02988e 100644
--- a/drivers/dma-buf/heaps/system_heap.c
+++ b/drivers/dma-buf/heaps/system_heap.c
@@ -130,9 +130,10 @@ static struct sg_table *system_heap_map_dma_buf(struct dma_buf_attachment *attac
 {
 	struct dma_heap_attachment *a = attachment->priv;
 	struct sg_table *table = a->table;
+	int attrs = attachment->dma_map_attrs;
 	int ret;
 
-	ret = dma_map_sgtable(attachment->dev, table, direction, 0);
+	ret = dma_map_sgtable(attachment->dev, table, direction, attrs);
 	if (ret)
 		return ERR_PTR(ret);
 
@@ -145,9 +146,10 @@ static void system_heap_unmap_dma_buf(struct dma_buf_attachment *attachment,
 				      enum dma_data_direction direction)
 {
 	struct dma_heap_attachment *a = attachment->priv;
+	int attrs = attachment->dma_map_attrs;
 
 	a->mapped = false;
-	dma_unmap_sgtable(attachment->dev, table, direction, 0);
+	dma_unmap_sgtable(attachment->dev, table, direction, attrs);
 }
 
 static int system_heap_dma_buf_begin_cpu_access(struct dma_buf *dmabuf,
-- 
2.17.1

             reply	other threads:[~2021-07-08 10:14 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-08 10:14 guangming.cao [this message]
2021-07-15  6:24 ` guangming.cao
2021-07-21  9:43   ` guangming.cao
2021-08-10  2:02     ` [PATCH] dma_heap: enable map_attrs when (un)map_attachment guangming.cao
2021-08-26  6:42       ` [PATCH] dma-buf: Add support for mapping buffers with DMA attributes guangming.cao

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