linux-kernel - [PATCH 6/9] dmaengine:pl330: set segment_boundary

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Date:	Fri, 4 Dec 2015 11:24:23 +0800
From:	Wang Hongcheng <annie.wang@....com>
To:	Vinod Koul <vinod.koul@...el.com>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Joerg Roedel <joro@...tes.org>,
	"Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>
CC:	<linux-acpi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-serial@...r.kernel.org>, <dmaengine@...r.kernel.org>,
	<iommu@...ts.linux-foundation.org>, Borislav Petkov <bp@...en8.de>,
	Huang Rui <ray.huang@....com>,
	Wan Zongshun <vincent.wan@....com>, Ken Xue <ken.xue@....com>,
	Tony Li <tony.li@....com>, Wang Hongcheng <annie.wang@....com>,
	Wan Zongshun <Vincent.Wan@....com>
Subject: [PATCH 6/9] dmaengine:pl330: set segment_boundary_mask = 0cffffffff

Because amd iommu and software iommu need this mask.For example,
if we use software iommu without this mask, we will
get 'Out of SW-IOMMU space' error, when calling swiotlb_map_page
function.

Signed-off-by: Wan Zongshun <Vincent.Wan@....com>
Signed-off-by: Wang Hongcheng <annie.wang@....com>
---
 drivers/dma/pl330.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index 9d7af0d..fb46fdf 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -2966,6 +2966,10 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
 	if (ret)
 		dev_err(&adev->dev, "unable to set the seg size\n");
 
+	dev_info(&adev->dev, "set the seg boundary\n");
+	ret = dma_set_seg_boundary(&adev->dev, 0xffffffff);
+	if (ret)
+		dev_err(&adev->dev, "unable to set the seg boundary\n");
 
 	dev_info(&adev->dev,
 		 "Loaded driver for PL330 DMAC-%x\n", adev->periphid);
-- 
1.9.1

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