iommu/mediatek: Set dma_mask for PGTABLE_PA_35_EN

[ Upstream commit f045e9df6537175d02565f21616ac1a9dd59b61c ]

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@mediatek.com>
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230316101445.12443-1-yong.wu@mediatek.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 56d0075..e93ca9d 100644 (file)
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -1237,6 +1237,14 @@ 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)) {