linux-kernel - [PATCH v7 15/36] iommu/mediatek: Add SUB_COMMON

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Message-ID: <20220503071427.2285-16-yong.wu@mediatek.com>
Date:   Tue, 3 May 2022 15:14:06 +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 15/36] iommu/mediatek: Add SUB_COMMON_3BITS flag

In prevous SoC, the sub common id occupy 2 bits. the mt8195's sub common
id has 3bits. Add a new flag for this. and rename the previous flag to
_2BITS. For readable, I put these two flags together, then move the
other flags. no functional change.

Signed-off-by: Yong Wu <yong.wu@...iatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
 drivers/iommu/mtk_iommu.c | 26 ++++++++++++++++----------
 drivers/iommu/mtk_iommu.h |  2 +-
 2 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index d9689e041336..937478cd8966 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -105,6 +105,8 @@
 #define REG_MMU1_INT_ID				0x154
 #define F_MMU_INT_ID_COMM_ID(a)			(((a) >> 9) & 0x7)
 #define F_MMU_INT_ID_SUB_COMM_ID(a)		(((a) >> 7) & 0x3)
+#define F_MMU_INT_ID_COMM_ID_EXT(a)		(((a) >> 10) & 0x7)
+#define F_MMU_INT_ID_SUB_COMM_ID_EXT(a)		(((a) >> 7) & 0x7)
 #define F_MMU_INT_ID_LARB_ID(a)			(((a) >> 7) & 0x7)
 #define F_MMU_INT_ID_PORT_ID(a)			(((a) >> 2) & 0x1f)
 
@@ -116,13 +118,14 @@
 #define HAS_VLD_PA_RNG			BIT(2)
 #define RESET_AXI			BIT(3)
 #define OUT_ORDER_WR_EN			BIT(4)
-#define HAS_SUB_COMM			BIT(5)
-#define WR_THROT_EN			BIT(6)
-#define HAS_LEGACY_IVRP_PADDR		BIT(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 HAS_SUB_COMM_2BITS		BIT(5)
+#define HAS_SUB_COMM_3BITS		BIT(6)
+#define WR_THROT_EN			BIT(7)
+#define HAS_LEGACY_IVRP_PADDR		BIT(8)
+#define IOVA_34_EN			BIT(9)
+#define SHARE_PGTABLE			BIT(10) /* 2 HW share pgtable */
+#define DCM_DISABLE			BIT(11)
+#define STD_AXI_MODE			BIT(12) /* For non MM iommu */
 
 #define MTK_IOMMU_HAS_FLAG(pdata, _x) \
 		((((pdata)->flags) & (_x)) == (_x))
@@ -290,9 +293,12 @@ static irqreturn_t mtk_iommu_isr(int irq, void *dev_id)
 	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)) {
+	if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_SUB_COMM_2BITS)) {
 		fault_larb = F_MMU_INT_ID_COMM_ID(regval);
 		sub_comm = F_MMU_INT_ID_SUB_COMM_ID(regval);
+	} else if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_SUB_COMM_3BITS)) {
+		fault_larb = F_MMU_INT_ID_COMM_ID_EXT(regval);
+		sub_comm = F_MMU_INT_ID_SUB_COMM_ID_EXT(regval);
 	} else {
 		fault_larb = F_MMU_INT_ID_LARB_ID(regval);
 	}
@@ -1068,7 +1074,7 @@ static const struct mtk_iommu_plat_data mt2712_data = {
 
 static const struct mtk_iommu_plat_data mt6779_data = {
 	.m4u_plat      = M4U_MT6779,
-	.flags         = HAS_SUB_COMM | OUT_ORDER_WR_EN | WR_THROT_EN,
+	.flags         = HAS_SUB_COMM_2BITS | OUT_ORDER_WR_EN | WR_THROT_EN,
 	.inv_sel_reg   = REG_MMU_INV_SEL_GEN2,
 	.iova_region   = single_domain,
 	.iova_region_nr = ARRAY_SIZE(single_domain),
@@ -1105,7 +1111,7 @@ static const struct mtk_iommu_plat_data mt8183_data = {
 
 static const struct mtk_iommu_plat_data mt8192_data = {
 	.m4u_plat       = M4U_MT8192,
-	.flags          = HAS_BCLK | HAS_SUB_COMM | OUT_ORDER_WR_EN |
+	.flags          = HAS_BCLK | HAS_SUB_COMM_2BITS | OUT_ORDER_WR_EN |
 			  WR_THROT_EN | IOVA_34_EN,
 	.inv_sel_reg    = REG_MMU_INV_SEL_GEN2,
 	.iova_region    = mt8192_multi_dom,
diff --git a/drivers/iommu/mtk_iommu.h b/drivers/iommu/mtk_iommu.h
index dc868fce0d2a..f41e32252056 100644
--- a/drivers/iommu/mtk_iommu.h
+++ b/drivers/iommu/mtk_iommu.h
@@ -20,7 +20,7 @@
 #include <dt-bindings/memory/mtk-memory-port.h>
 
 #define MTK_LARB_COM_MAX	8
-#define MTK_LARB_SUBCOM_MAX	4
+#define MTK_LARB_SUBCOM_MAX	8
 
 #define MTK_IOMMU_GROUP_MAX	8
 
-- 
2.18.0