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Message-ID: <20220503071427.2285-22-yong.wu@mediatek.com>
Date: Tue, 3 May 2022 15:14:12 +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 21/36] iommu/mediatek: Add infra iommu support
The infra iommu enable bits in mt8195 is in the pericfg register segment,
use regmap to update it.
If infra iommu master translation fault, It doesn't have the larbid/portid,
thus print out the whole register value.
Since regmap_update_bits may fail, add return value for mtk_iommu_config.
Signed-off-by: Yong Wu <yong.wu@...iatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
drivers/iommu/mtk_iommu.c | 36 +++++++++++++++++++++++++++++-------
drivers/iommu/mtk_iommu.h | 2 ++
2 files changed, 31 insertions(+), 7 deletions(-)
diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index cd89c109e8c4..ff48506b480c 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -112,6 +112,8 @@
#define MTK_PROTECT_PA_ALIGN 256
+#define PERICFG_IOMMU_1 0x714
+
#define HAS_4GB_MODE BIT(0)
/* HW will use the EMI clock if there isn't the "bclk". */
#define HAS_BCLK BIT(1)
@@ -343,8 +345,8 @@ static irqreturn_t mtk_iommu_isr(int irq, void *dev_id)
write ? IOMMU_FAULT_WRITE : IOMMU_FAULT_READ)) {
dev_err_ratelimited(
data->dev,
- "fault type=0x%x iova=0x%llx pa=0x%llx larb=%d port=%d layer=%d %s\n",
- int_state, fault_iova, fault_pa, fault_larb, fault_port,
+ "fault type=0x%x iova=0x%llx pa=0x%llx master=0x%x(larb=%d port=%d) layer=%d %s\n",
+ int_state, fault_iova, fault_pa, regval, fault_larb, fault_port,
layer, write ? "write" : "read");
}
@@ -388,14 +390,15 @@ static int mtk_iommu_get_domain_id(struct device *dev,
return -EINVAL;
}
-static void mtk_iommu_config(struct mtk_iommu_data *data, struct device *dev,
- bool enable, unsigned int domid)
+static int mtk_iommu_config(struct mtk_iommu_data *data, struct device *dev,
+ bool enable, unsigned int domid)
{
struct mtk_smi_larb_iommu *larb_mmu;
unsigned int larbid, portid;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
const struct mtk_iommu_iova_region *region;
- int i;
+ u32 peri_mmuen, peri_mmuen_msk;
+ int i, ret = 0;
for (i = 0; i < fwspec->num_ids; ++i) {
larbid = MTK_M4U_TO_LARB(fwspec->ids[i]);
@@ -415,8 +418,19 @@ static void mtk_iommu_config(struct mtk_iommu_data *data, struct device *dev,
larb_mmu->mmu |= MTK_SMI_MMU_EN(portid);
else
larb_mmu->mmu &= ~MTK_SMI_MMU_EN(portid);
+ } else if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_INFRA)) {
+ peri_mmuen_msk = BIT(portid);
+ peri_mmuen = enable ? peri_mmuen_msk : 0;
+
+ ret = regmap_update_bits(data->pericfg, PERICFG_IOMMU_1,
+ peri_mmuen_msk, peri_mmuen);
+ if (ret)
+ dev_err(dev, "%s iommu(%s) inframaster 0x%x fail(%d).\n",
+ enable ? "enable" : "disable",
+ dev_name(data->dev), peri_mmuen_msk, ret);
}
}
+ return ret;
}
static int mtk_iommu_domain_finalise(struct mtk_iommu_domain *dom,
@@ -531,8 +545,7 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain,
}
mutex_unlock(&data->mutex);
- mtk_iommu_config(data, dev, true, domid);
- return 0;
+ return mtk_iommu_config(data, dev, true, domid);
err_unlock:
mutex_unlock(&data->mutex);
@@ -997,6 +1010,15 @@ static int mtk_iommu_probe(struct platform_device *pdev)
dev_err(dev, "mm dts parse fail(%d).", ret);
goto out_runtime_disable;
}
+ } else if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_INFRA) &&
+ data->plat_data->pericfg_comp_str) {
+ infracfg = syscon_regmap_lookup_by_compatible(data->plat_data->pericfg_comp_str);
+ if (IS_ERR(infracfg)) {
+ ret = PTR_ERR(infracfg);
+ goto out_runtime_disable;
+ }
+
+ data->pericfg = infracfg;
}
platform_set_drvdata(pdev, data);
diff --git a/drivers/iommu/mtk_iommu.h b/drivers/iommu/mtk_iommu.h
index f41e32252056..56838fad8c73 100644
--- a/drivers/iommu/mtk_iommu.h
+++ b/drivers/iommu/mtk_iommu.h
@@ -55,6 +55,7 @@ struct mtk_iommu_plat_data {
u32 flags;
u32 inv_sel_reg;
+ char *pericfg_comp_str;
struct list_head *hw_list;
unsigned int iova_region_nr;
const struct mtk_iommu_iova_region *iova_region;
@@ -80,6 +81,7 @@ struct mtk_iommu_data {
struct device *smicomm_dev;
struct dma_iommu_mapping *mapping; /* For mtk_iommu_v1.c */
+ struct regmap *pericfg;
struct mutex mutex; /* Protect m4u_group/m4u_dom above */
--
2.18.0
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