linux-kernel - [PATCH v7 12/36] iommu/mediatek: Add a flag STD_AXI

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Message-ID: <20220503071427.2285-13-yong.wu@mediatek.com>
Date:   Tue, 3 May 2022 15:14:03 +0800
From:   Yong Wu <yong.wu@...iatek.com>
To:     Joerg Roedel <joro@...tes.org>, Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Will Deacon <will@...nel.org>
CC:     Robin Murphy <robin.murphy@....com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Tomasz Figa <tfiga@...omium.org>,
        <linux-mediatek@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <iommu@...ts.linux-foundation.org>,
        Hsin-Yi Wang <hsinyi@...omium.org>, <yong.wu@...iatek.com>,
        <youlin.pei@...iatek.com>, <anan.sun@...iatek.com>,
        <xueqi.zhang@...iatek.com>, <yen-chang.chen@...iatek.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        <mingyuan.ma@...iatek.com>, <yf.wang@...iatek.com>,
        <libo.kang@...iatek.com>, <chengci.xu@...iatek.com>
Subject: [PATCH v7 12/36] iommu/mediatek: Add a flag STD_AXI_MODE

Add a new flag STD_AXI_MODE which is prepared for infra and apu iommu
which use the standard axi mode. All the current SoC don't use this flag.

Signed-off-by: Yong Wu <yong.wu@...iatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
 drivers/iommu/mtk_iommu.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 92f172a772d1..22e2b104e3ee 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -122,6 +122,7 @@
 #define IOVA_34_EN			BIT(8)
 #define SHARE_PGTABLE			BIT(9) /* 2 HW share pgtable */
 #define DCM_DISABLE			BIT(10)
+#define STD_AXI_MODE			BIT(11) /* For non MM iommu */
 
 #define MTK_IOMMU_HAS_FLAG(pdata, _x) \
 		((((pdata)->flags) & (_x)) == (_x))
@@ -785,7 +786,8 @@ static int mtk_iommu_hw_init(const struct mtk_iommu_data *data)
 		regval = 0;
 	} else {
 		regval = readl_relaxed(data->base + REG_MMU_MISC_CTRL);
-		regval &= ~F_MMU_STANDARD_AXI_MODE_MASK;
+		if (!MTK_IOMMU_HAS_FLAG(data->plat_data, STD_AXI_MODE))
+			regval &= ~F_MMU_STANDARD_AXI_MODE_MASK;
 		if (MTK_IOMMU_HAS_FLAG(data->plat_data, OUT_ORDER_WR_EN))
 			regval &= ~F_MMU_IN_ORDER_WR_EN_MASK;
 	}
-- 
2.18.0