From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wang Hongcheng Subject: [PATCH 6/9] dmaengine:pl330: set segment_boundary_mask = 0cffffffff Date: Fri, 4 Dec 2015 11:24:23 +0800 Message-ID: <1449199466-6081-7-git-send-email-annie.wang@amd.com> References: <1449199466-6081-1-git-send-email-annie.wang@amd.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1449199466-6081-1-git-send-email-annie.wang@amd.com> Sender: linux-kernel-owner@vger.kernel.org To: Vinod Koul , Mika Westerberg , Joerg Roedel , Greg Kroah-Hartman , "Rafael J. Wysocki" Cc: linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, dmaengine@vger.kernel.org, iommu@lists.linux-foundation.org, Borislav Petkov , Huang Rui , Wan Zongshun , Ken Xue , Tony Li , Wang Hongcheng , Wan Zongshun List-Id: linux-serial@vger.kernel.org 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 Signed-off-by: Wang Hongcheng --- 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