linux-kernel - [PATCH v2 02/19] iommu/mediatek: Add m4u1_mask to distinguish m4u

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Date:   Sun, 5 Jan 2020 18:45:06 +0800
From:   Chao Hao <chao.hao@...iatek.com>
To:     Joerg Roedel <joro@...tes.org>, Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>
CC:     <iommu@...ts.linux-foundation.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>, <wsd_upstream@...iatek.com>,
        Chao Hao <chao.hao@...iatek.com>,
        Jun Yan <jun.yan@...iatek.com>,
        Cui Zhang <zhang.cui@...iatek.com>,
        Yong Wu <yong.wu@...iatek.com>,
        Anan Sun <anan.sun@...iatek.com>
Subject: [PATCH v2 02/19] iommu/mediatek: Add m4u1_mask to distinguish m4u_id

For some platforms(ex: later mt6779), it maybe have two IOMMUs,
so we can add m4u_mask variable to distinguish it by different
smi_larb id

Signed-off-by: Chao Hao <chao.hao@...iatek.com>
---
 drivers/iommu/mtk_iommu.c | 3 +++
 drivers/iommu/mtk_iommu.h | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 6fc1f5ecf91e..09192edef1f7 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -678,6 +678,9 @@ static int mtk_iommu_probe(struct platform_device *pdev)
 		}
 		data->larb_imu[id].dev = &plarbdev->dev;
 
+		if (data->plat_data->m4u1_mask == (1 << id))
+			data->m4u_id = 1;
+
 		component_match_add_release(dev, &match, release_of,
 					    compare_of, larbnode);
 	}
diff --git a/drivers/iommu/mtk_iommu.h b/drivers/iommu/mtk_iommu.h
index ea949a324e33..b4bd76548615 100644
--- a/drivers/iommu/mtk_iommu.h
+++ b/drivers/iommu/mtk_iommu.h
@@ -42,6 +42,7 @@ struct mtk_iommu_plat_data {
 	bool                has_bclk;
 	bool                has_vld_pa_rng;
 	bool                reset_axi;
+	u32                 m4u1_mask;
 	unsigned char       larbid_remap[MTK_LARB_NR_MAX];
 };
 
@@ -59,6 +60,7 @@ struct mtk_iommu_data {
 	bool                            enable_4GB;
 	spinlock_t			tlb_lock; /* lock for tlb range flush */
 
+	u32				m4u_id;
 	struct iommu_device		iommu;
 	const struct mtk_iommu_plat_data *plat_data;
 
-- 
2.18.0