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From:   Yong Wu <yong.wu@mediatek.com>
To:     Joerg Roedel <joro@8bytes.org>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Robin Murphy <robin.murphy@arm.com>,
        Will Deacon <will@kernel.org>
CC:     Rob Herring <robh+dt@kernel.org>,
        Evan Green <evgreen@chromium.org>,
        Tomasz Figa <tfiga@google.com>,
        <linux-mediatek@lists.infradead.org>,
        <srv_heupstream@mediatek.com>, <devicetree@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <iommu@lists.linux-foundation.org>, <yong.wu@mediatek.com>,
        <youlin.pei@mediatek.com>, Nicolas Boichat <drinkcat@chromium.org>,
        <anan.sun@mediatek.com>, Matthias Kaehlcke <mka@chromium.org>,
        <cui.zhang@mediatek.com>, <chao.hao@mediatek.com>,
        <ming-fan.chen@mediatek.com>
Subject: [PATCH v10 13/23] iommu/mediatek: Refine protect memory definition
Date:   Wed, 21 Aug 2019 21:53:16 +0800
Message-ID: <1566395606-7975-14-git-send-email-yong.wu@mediatek.com>
In-Reply-To: <1566395606-7975-1-git-send-email-yong.wu@mediatek.com>
References: <1566395606-7975-1-git-send-email-yong.wu@mediatek.com>
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The protect memory setting is a little different in the different SoCs.
In the register REG_MMU_CTRL_REG(0x110), the TF_PROT(translation fault
protect) shift bit is normally 4 while it shift 5 bits only in the
mt8173. This patch delete the complex MACRO and use a common if-else
instead.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: Evan Green <evgreen@chromium.org>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
---
 drivers/iommu/mtk_iommu.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 34f0203..947a8c6b8 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -44,12 +44,9 @@
 #define REG_MMU_DCM_DIS				0x050
 
 #define REG_MMU_CTRL_REG			0x110
+#define F_MMU_TF_PROT_TO_PROGRAM_ADDR		(2 << 4)
 #define F_MMU_PREFETCH_RT_REPLACE_MOD		BIT(4)
-#define F_MMU_TF_PROTECT_SEL_SHIFT(data) \
-	((data)->plat_data->m4u_plat == M4U_MT2712 ? 4 : 5)
-/* It's named by F_MMU_TF_PROT_SEL in mt2712. */
-#define F_MMU_TF_PROTECT_SEL(prot, data) \
-	(((prot) & 0x3) << F_MMU_TF_PROTECT_SEL_SHIFT(data))
+#define F_MMU_TF_PROT_TO_PROGRAM_ADDR_MT8173	(2 << 5)
 
 #define REG_MMU_IVRP_PADDR			0x114
 
@@ -539,9 +536,11 @@ static int mtk_iommu_hw_init(const struct mtk_iommu_data *data)
 		return ret;
 	}
 
-	regval = F_MMU_TF_PROTECT_SEL(2, data);
 	if (data->plat_data->m4u_plat == M4U_MT8173)
-		regval |= F_MMU_PREFETCH_RT_REPLACE_MOD;
+		regval = F_MMU_PREFETCH_RT_REPLACE_MOD |
+			 F_MMU_TF_PROT_TO_PROGRAM_ADDR_MT8173;
+	else
+		regval = F_MMU_TF_PROT_TO_PROGRAM_ADDR;
 	writel_relaxed(regval, data->base + REG_MMU_CTRL_REG);
 
 	regval = F_L2_MULIT_HIT_EN |
-- 
1.9.1