linux-kernel - [PATCH v2 21/23] iommu/mediatek: Adjust the structure

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Message-ID: <20200905080920.13396-22-yong.wu@mediatek.com>
Date:   Sat, 5 Sep 2020 16:09:18 +0800
From:   Yong Wu <yong.wu@...iatek.com>
To:     Joerg Roedel <joro@...tes.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Robin Murphy <robin.murphy@....com>
CC:     Will Deacon <will@...nel.org>, Evan Green <evgreen@...omium.org>,
        Tomasz Figa <tfiga@...gle.com>,
        <linux-mediatek@...ts.infradead.org>,
        <srv_heupstream@...iatek.com>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <iommu@...ts.linux-foundation.org>, <yong.wu@...iatek.com>,
        <youlin.pei@...iatek.com>, Nicolas Boichat <drinkcat@...omium.org>,
        <anan.sun@...iatek.com>, <chao.hao@...iatek.com>,
        <ming-fan.chen@...iatek.com>
Subject: [PATCH v2 21/23] iommu/mediatek: Adjust the structure

Add "struct mtk_iommu_data *" in the "struct mtk_iommu_domain",
reduce the call mtk_iommu_get_m4u_data().
No functional change.

Signed-off-by: Yong Wu <yong.wu@...iatek.com>
---
 drivers/iommu/mtk_iommu.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 93ce4fa806cf..d0593d317240 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -123,6 +123,7 @@ struct mtk_iommu_domain {
 	struct io_pgtable_cfg		cfg;
 	struct io_pgtable_ops		*iop;
 
+	struct mtk_iommu_data		*data;
 	struct iommu_domain		domain;
 };
 
@@ -348,7 +349,7 @@ static void mtk_iommu_config(struct mtk_iommu_data *data,
 
 static int mtk_iommu_domain_finalise(struct mtk_iommu_domain *dom)
 {
-	struct mtk_iommu_data *data = mtk_iommu_get_m4u_data();
+	struct mtk_iommu_data *data = dom->data;
 
 	/* Use the exist domain as there is only one m4u pgtable here. */
 	if (data->m4u_dom) {
@@ -397,6 +398,7 @@ static struct iommu_domain *mtk_iommu_domain_alloc(unsigned type)
 	if (iommu_get_dma_cookie(&dom->domain))
 		goto  free_dom;
 
+	dom->data = data;
 	if (mtk_iommu_domain_finalise(dom))
 		goto  put_dma_cookie;
 
@@ -469,10 +471,9 @@ static int mtk_iommu_map(struct iommu_domain *domain, unsigned long iova,
 			 phys_addr_t paddr, size_t size, int prot, gfp_t gfp)
 {
 	struct mtk_iommu_domain *dom = to_mtk_domain(domain);
-	struct mtk_iommu_data *data = mtk_iommu_get_m4u_data();
 
 	/* The "4GB mode" M4U physically can not use the lower remap of Dram. */
-	if (data->enable_4GB)
+	if (dom->data->enable_4GB)
 		paddr |= BIT_ULL(32);
 
 	/* Synchronize with the tlb_lock */
@@ -490,31 +491,32 @@ static size_t mtk_iommu_unmap(struct iommu_domain *domain,
 
 static void mtk_iommu_flush_iotlb_all(struct iommu_domain *domain)
 {
-	mtk_iommu_tlb_flush_all(mtk_iommu_get_m4u_data());
+	struct mtk_iommu_domain *dom = to_mtk_domain(domain);
+
+	mtk_iommu_tlb_flush_all(dom->data);
 }
 
 static void mtk_iommu_iotlb_sync(struct iommu_domain *domain,
 				 struct iommu_iotlb_gather *gather)
 {
-	struct mtk_iommu_data *data = mtk_iommu_get_m4u_data();
+	struct mtk_iommu_domain *dom = to_mtk_domain(domain);
 	size_t length = gather->end - gather->start;
 
 	if (gather->start == ULONG_MAX)
 		return;
 
 	mtk_iommu_tlb_flush_range_sync(gather->start, length, gather->pgsize,
-				       data);
+				       dom->data);
 }
 
 static phys_addr_t mtk_iommu_iova_to_phys(struct iommu_domain *domain,
 					  dma_addr_t iova)
 {
 	struct mtk_iommu_domain *dom = to_mtk_domain(domain);
-	struct mtk_iommu_data *data = mtk_iommu_get_m4u_data();
 	phys_addr_t pa;
 
 	pa = dom->iop->iova_to_phys(dom->iop, iova);
-	if (data->enable_4GB && pa >= MTK_IOMMU_4GB_MODE_REMAP_BASE)
+	if (dom->data->enable_4GB && pa >= MTK_IOMMU_4GB_MODE_REMAP_BASE)
 		pa &= ~BIT_ULL(32);
 
 	return pa;
-- 
2.18.0