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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: youlin.pei@mediatek.com, devicetree@vger.kernel.org,
	Nicolas Boichat <drinkcat@chromium.org>,
	cui.zhang@mediatek.com, srv_heupstream@mediatek.com,
	chao.hao@mediatek.com, linux-kernel@vger.kernel.org,
	Evan Green <evgreen@chromium.org>, Tomasz Figa <tfiga@google.com>,
	iommu@lists.linux-foundation.org,
	Rob Herring <robh+dt@kernel.org>,
	linux-mediatek@lists.infradead.org, yong.wu@mediatek.com,
	ming-fan.chen@mediatek.com, anan.sun@mediatek.com,
	Matthias Kaehlcke <mka@chromium.org>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v9 05/21] iommu/io-pgtable-arm-v7s: Add paddr_to_iopte and iopte_to_paddr helpers
Date: Sat, 10 Aug 2019 15:58:05 +0800
Message-ID: <1565423901-17008-6-git-send-email-yong.wu@mediatek.com> (raw)
In-Reply-To: <1565423901-17008-1-git-send-email-yong.wu@mediatek.com>

Add two helper functions: paddr_to_iopte and iopte_to_paddr.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Evan Green <evgreen@chromium.org>
---
 drivers/iommu/io-pgtable-arm-v7s.c | 45 ++++++++++++++++++++++++++++----------
 1 file changed, 33 insertions(+), 12 deletions(-)

diff --git a/drivers/iommu/io-pgtable-arm-v7s.c b/drivers/iommu/io-pgtable-arm-v7s.c
index 0fc8dfa..72f1880 100644
--- a/drivers/iommu/io-pgtable-arm-v7s.c
+++ b/drivers/iommu/io-pgtable-arm-v7s.c
@@ -169,18 +169,38 @@ struct arm_v7s_io_pgtable {
 	spinlock_t		split_lock;
 };
 
+static bool arm_v7s_pte_is_cont(arm_v7s_iopte pte, int lvl);
+
 static dma_addr_t __arm_v7s_dma_addr(void *pages)
 {
 	return (dma_addr_t)virt_to_phys(pages);
 }
 
-static arm_v7s_iopte *iopte_deref(arm_v7s_iopte pte, int lvl)
+static arm_v7s_iopte paddr_to_iopte(phys_addr_t paddr, int lvl,
+				    struct io_pgtable_cfg *cfg)
 {
+	return paddr & ARM_V7S_LVL_MASK(lvl);
+}
+
+static phys_addr_t iopte_to_paddr(arm_v7s_iopte pte, int lvl,
+				  struct io_pgtable_cfg *cfg)
+{
+	arm_v7s_iopte mask;
+
 	if (ARM_V7S_PTE_IS_TABLE(pte, lvl))
-		pte &= ARM_V7S_TABLE_MASK;
+		mask = ARM_V7S_TABLE_MASK;
+	else if (arm_v7s_pte_is_cont(pte, lvl))
+		mask = ARM_V7S_LVL_MASK(lvl) * ARM_V7S_CONT_PAGES;
 	else
-		pte &= ARM_V7S_LVL_MASK(lvl);
-	return phys_to_virt(pte);
+		mask = ARM_V7S_LVL_MASK(lvl);
+
+	return pte & mask;
+}
+
+static arm_v7s_iopte *iopte_deref(arm_v7s_iopte pte, int lvl,
+				  struct arm_v7s_io_pgtable *data)
+{
+	return phys_to_virt(iopte_to_paddr(pte, lvl, &data->iop.cfg));
 }
 
 static void *__arm_v7s_alloc_table(int lvl, gfp_t gfp,
@@ -396,7 +416,7 @@ static int arm_v7s_init_pte(struct arm_v7s_io_pgtable *data,
 	if (num_entries > 1)
 		pte = arm_v7s_pte_to_cont(pte, lvl);
 
-	pte |= paddr & ARM_V7S_LVL_MASK(lvl);
+	pte |= paddr_to_iopte(paddr, lvl, cfg);
 
 	__arm_v7s_set_pte(ptep, pte, num_entries, cfg);
 	return 0;
@@ -462,7 +482,7 @@ static int __arm_v7s_map(struct arm_v7s_io_pgtable *data, unsigned long iova,
 	}
 
 	if (ARM_V7S_PTE_IS_TABLE(pte, lvl)) {
-		cptep = iopte_deref(pte, lvl);
+		cptep = iopte_deref(pte, lvl, data);
 	} else if (pte) {
 		/* We require an unmap first */
 		WARN_ON(!selftest_running);
@@ -512,7 +532,8 @@ static void arm_v7s_free_pgtable(struct io_pgtable *iop)
 		arm_v7s_iopte pte = data->pgd[i];
 
 		if (ARM_V7S_PTE_IS_TABLE(pte, 1))
-			__arm_v7s_free_table(iopte_deref(pte, 1), 2, data);
+			__arm_v7s_free_table(iopte_deref(pte, 1, data),
+					     2, data);
 	}
 	__arm_v7s_free_table(data->pgd, 1, data);
 	kmem_cache_destroy(data->l2_tables);
@@ -582,7 +603,7 @@ static size_t arm_v7s_split_blk_unmap(struct arm_v7s_io_pgtable *data,
 		if (!ARM_V7S_PTE_IS_TABLE(pte, 1))
 			return 0;
 
-		tablep = iopte_deref(pte, 1);
+		tablep = iopte_deref(pte, 1, data);
 		return __arm_v7s_unmap(data, iova, size, 2, tablep);
 	}
 
@@ -641,7 +662,7 @@ static size_t __arm_v7s_unmap(struct arm_v7s_io_pgtable *data,
 				io_pgtable_tlb_add_flush(iop, iova, blk_size,
 					ARM_V7S_BLOCK_SIZE(lvl + 1), false);
 				io_pgtable_tlb_sync(iop);
-				ptep = iopte_deref(pte[i], lvl);
+				ptep = iopte_deref(pte[i], lvl, data);
 				__arm_v7s_free_table(ptep, lvl + 1, data);
 			} else if (iop->cfg.quirks & IO_PGTABLE_QUIRK_NON_STRICT) {
 				/*
@@ -666,7 +687,7 @@ static size_t __arm_v7s_unmap(struct arm_v7s_io_pgtable *data,
 	}
 
 	/* Keep on walkin' */
-	ptep = iopte_deref(pte[0], lvl);
+	ptep = iopte_deref(pte[0], lvl, data);
 	return __arm_v7s_unmap(data, iova, size, lvl + 1, ptep);
 }
 
@@ -692,7 +713,7 @@ static phys_addr_t arm_v7s_iova_to_phys(struct io_pgtable_ops *ops,
 	do {
 		ptep += ARM_V7S_LVL_IDX(iova, ++lvl);
 		pte = READ_ONCE(*ptep);
-		ptep = iopte_deref(pte, lvl);
+		ptep = iopte_deref(pte, lvl, data);
 	} while (ARM_V7S_PTE_IS_TABLE(pte, lvl));
 
 	if (!ARM_V7S_PTE_IS_VALID(pte))
@@ -701,7 +722,7 @@ static phys_addr_t arm_v7s_iova_to_phys(struct io_pgtable_ops *ops,
 	mask = ARM_V7S_LVL_MASK(lvl);
 	if (arm_v7s_pte_is_cont(pte, lvl))
 		mask *= ARM_V7S_CONT_PAGES;
-	return (pte & mask) | (iova & ~mask);
+	return iopte_to_paddr(pte, lvl, &data->iop.cfg) | (iova & ~mask);
 }
 
 static struct io_pgtable *arm_v7s_alloc_pgtable(struct io_pgtable_cfg *cfg,
-- 
1.9.1


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  parent reply index

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-10  7:58 [PATCH v9 00/21] MT8183 IOMMU SUPPORT Yong Wu
2019-08-10  7:58 ` [PATCH v9 01/21] dt-bindings: mediatek: Add binding for mt8183 IOMMU and SMI Yong Wu
2019-08-10  7:58 ` [PATCH v9 02/21] iommu/mediatek: Use a struct as the platform data Yong Wu
2019-08-10  7:58 ` [PATCH v9 03/21] memory: mtk-smi: Use a general config_port interface Yong Wu
2019-08-10  7:58 ` [PATCH v9 04/21] memory: mtk-smi: Use a struct for the platform data for smi-common Yong Wu
2019-08-10  7:58 ` Yong Wu [this message]
2019-08-10  7:58 ` [PATCH v9 06/21] iommu/io-pgtable-arm-v7s: Use ias/oas to check the valid iova/pa Yong Wu
2019-08-10  7:58 ` [PATCH v9 07/21] iommu/io-pgtable-arm-v7s: Rename the quirk from MTK_4GB to MTK_EXT Yong Wu
2019-08-10  7:58 ` [PATCH v9 08/21] iommu/io-pgtable-arm-v7s: Extend MediaTek 4GB Mode Yong Wu
2019-08-14 14:41   ` Will Deacon
2019-08-15  8:47     ` Yong Wu
2019-08-15  9:51       ` Will Deacon
2019-08-15 10:03         ` Yong Wu
2019-08-15 10:04           ` Will Deacon
2019-08-15 10:18         ` Yong Wu
2019-08-15 11:50           ` Will Deacon
2019-08-16  7:22             ` Yong Wu
2019-08-19 11:24               ` Will Deacon
2019-08-10  7:58 ` [PATCH v9 09/21] iommu/mediatek: Add bclk can be supported optionally Yong Wu
2019-08-10  7:58 ` [PATCH v9 10/21] iommu/mediatek: Add larb-id remapped support Yong Wu
2019-08-10  7:58 ` [PATCH v9 11/21] iommu/mediatek: Refine protect memory definition Yong Wu
2019-08-10  7:58 ` [PATCH v9 12/21] iommu/mediatek: Move reset_axi into plat_data Yong Wu
2019-08-10  7:58 ` [PATCH v9 13/21] iommu/mediatek: Move vld_pa_rng " Yong Wu
2019-08-10  7:58 ` [PATCH v9 14/21] memory: mtk-smi: Add gals support Yong Wu
2019-08-10  7:58 ` [PATCH v9 15/21] iommu/mediatek: Add mt8183 IOMMU support Yong Wu
2019-08-10  7:58 ` [PATCH v9 16/21] iommu/mediatek: Add mmu1 support Yong Wu
2019-08-10  7:58 ` [PATCH v9 17/21] memory: mtk-smi: Invoke pm runtime_callback to enable clocks Yong Wu
2019-08-10  7:58 ` [PATCH v9 18/21] memory: mtk-smi: Add bus_sel for mt8183 Yong Wu
2019-08-10  7:58 ` [PATCH v9 19/21] iommu/mediatek: Fix VLD_PA_RNG register backup when suspend Yong Wu
2019-08-10  7:58 ` [PATCH v9 20/21] memory: mtk-smi: Get rid of need_larbid Yong Wu
2019-08-10  7:58 ` [PATCH v9 21/21] iommu/mediatek: Clean up struct mtk_smi_iommu Yong Wu
2019-08-14  8:18 ` [PATCH v9 00/21] MT8183 IOMMU SUPPORT Joerg Roedel
2019-08-14  8:24   ` Will Deacon

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