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From:   Yong Wu <yong.wu@mediatek.com>
To:     Joerg Roedel <joro@8bytes.org>, Rob Herring <robh+dt@kernel.org>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Will Deacon <will@kernel.org>,
        Robin Murphy <robin.murphy@arm.com>
CC:     Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>,
        Evan Green <evgreen@chromium.org>,
        Tomasz Figa <tfiga@google.com>,
        Tomasz Figa <tfiga@chromium.org>,
        <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>, <chao.hao@mediatek.com>
Subject: [PATCH 10/24] iommu/mediatek: Always enable output PA over 32bits in isr
Date:   Wed, 30 Jun 2021 10:34:50 +0800
Message-ID: <20210630023504.18177-11-yong.wu@mediatek.com>
In-Reply-To: <20210630023504.18177-1-yong.wu@mediatek.com>
References: <20210630023504.18177-1-yong.wu@mediatek.com>
MIME-Version: 1.0
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Currently the output PA[32:33] is contained by the flag IOVA_34.
This is not right. the iova_34 has no relation with pa[32:33].
the 32bits iova still could map to pa[32:33], This patch move it
out of the flag.

This patch no need fix tag since currently only mt8192 use the
calulation and it always has this IOVA_34 flag.

This is preparing for the IOMMU that still use IOVA 32bits.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
 drivers/iommu/mtk_iommu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index fcf70787d3d1..35e321ed6d3d 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -287,11 +287,11 @@ static irqreturn_t mtk_iommu_isr(int irq, void *dev_id)
 	write = fault_iova & F_MMU_FAULT_VA_WRITE_BIT;
 	if (MTK_IOMMU_HAS_FLAG(data->plat_data, IOVA_34_EN)) {
 		va34_32 = FIELD_GET(F_MMU_INVAL_VA_34_32_MASK, fault_iova);
-		pa34_32 = FIELD_GET(F_MMU_INVAL_PA_34_32_MASK, fault_iova);
 		fault_iova = fault_iova & F_MMU_INVAL_VA_31_12_MASK;
 		fault_iova |= (u64)va34_32 << 32;
-		fault_pa |= (u64)pa34_32 << 32;
 	}
+	pa34_32 = FIELD_GET(F_MMU_INVAL_PA_34_32_MASK, fault_iova);
+	fault_pa |= (u64)pa34_32 << 32;
 
 	fault_port = F_MMU_INT_ID_PORT_ID(regval);
 	if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_SUB_COMM)) {
-- 
2.18.0