linux-kernel - [PATCH v8 2/7] iommu/mediatek: Set dma_mask for PGTABLE_PA_35

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Date:   Tue, 7 Mar 2023 16:05:50 +0800
From:   Yong Wu <yong.wu@...iatek.com>
To:     Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>
CC:     Robin Murphy <robin.murphy@....com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Yong Wu <yong.wu@...iatek.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>, <iommu@...ts.linux.dev>,
        <linux-mediatek@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <mingyuan.ma@...iatek.com>,
        <yf.wang@...iatek.com>, <jianjiao.zeng@...iatek.com>,
        <chengci.xu@...iatek.com>, <youlin.pei@...iatek.com>
Subject: [PATCH v8 2/7] iommu/mediatek: Set dma_mask for PGTABLE_PA_35_EN

When we enable PGTABLE_PA_35_EN, the PA for pgtable may be 35bits.
Thus add dma_mask for it.

Fixes: 301c3ca12576 ("iommu/mediatek: Allow page table PA up to 35bit")
Signed-off-by: Chengci.Xu <chengci.xu@...iatek.com>
Signed-off-by: Yong Wu <yong.wu@...iatek.com>
---
 drivers/iommu/mtk_iommu.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index e0264d5f1c9a..f2716896fee4 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -1297,6 +1297,14 @@ static int mtk_iommu_probe(struct platform_device *pdev)
 			return PTR_ERR(data->bclk);
 	}
 
+	if (MTK_IOMMU_HAS_FLAG(data->plat_data, PGTABLE_PA_35_EN)) {
+		ret = dma_set_mask(dev, DMA_BIT_MASK(35));
+		if (!ret) {
+			dev_err(dev, "Failed to set dma_mask 35.\n");
+			return ret;
+		}
+	}
+
 	pm_runtime_enable(dev);
 
 	if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM)) {
-- 
2.25.1