From: Yong Wu <yong.wu@mediatek.com>
To: Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>,
Krzysztof Kozlowski <krzk@kernel.org>,
Tomasz Figa <tfiga@google.com>,
<linux-mediatek@lists.infradead.org>,
<srv_heupstream@mediatek.com>, <linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<iommu@lists.linux-foundation.org>, <yong.wu@mediatek.com>,
<youlin.pei@mediatek.com>,
Nicolas Boichat <drinkcat@chromium.org>, <anan.sun@mediatek.com>,
<chao.hao@mediatek.com>, <jun.wen@mediatek.com>
Subject: [PATCH v2 1/6] iommu: Move iotlb_sync_map out from __iommu_map
Date: Thu, 19 Nov 2020 14:18:31 +0800 [thread overview]
Message-ID: <20201119061836.15238-2-yong.wu@mediatek.com> (raw)
In-Reply-To: <20201119061836.15238-1-yong.wu@mediatek.com>
In the end of __iommu_map, It alway call iotlb_sync_map.
This patch moves iotlb_sync_map out from __iommu_map since it is
unnecessary to call this for each sg segment especially iotlb_sync_map
is flush tlb all currently.
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
drivers/iommu/iommu.c | 24 +++++++++++++++++++-----
1 file changed, 19 insertions(+), 5 deletions(-)
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 8c470f451a32..decef851fa3a 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -2407,9 +2407,6 @@ static int __iommu_map(struct iommu_domain *domain, unsigned long iova,
size -= pgsize;
}
- if (ops->iotlb_sync_map)
- ops->iotlb_sync_map(domain);
-
/* unroll mapping in case something went wrong */
if (ret)
iommu_unmap(domain, orig_iova, orig_size - size);
@@ -2422,15 +2419,29 @@ static int __iommu_map(struct iommu_domain *domain, unsigned long iova,
int iommu_map(struct iommu_domain *domain, unsigned long iova,
phys_addr_t paddr, size_t size, int prot)
{
+ const struct iommu_ops *ops = domain->ops;
+ int ret;
+
might_sleep();
- return __iommu_map(domain, iova, paddr, size, prot, GFP_KERNEL);
+ ret = __iommu_map(domain, iova, paddr, size, prot, GFP_KERNEL);
+ if (ret == 0 && ops->iotlb_sync_map)
+ ops->iotlb_sync_map(domain);
+
+ return ret;
}
EXPORT_SYMBOL_GPL(iommu_map);
int iommu_map_atomic(struct iommu_domain *domain, unsigned long iova,
phys_addr_t paddr, size_t size, int prot)
{
- return __iommu_map(domain, iova, paddr, size, prot, GFP_ATOMIC);
+ const struct iommu_ops *ops = domain->ops;
+ int ret;
+
+ ret = __iommu_map(domain, iova, paddr, size, prot, GFP_ATOMIC);
+ if (ret == 0 && ops->iotlb_sync_map)
+ ops->iotlb_sync_map(domain);
+
+ return ret;
}
EXPORT_SYMBOL_GPL(iommu_map_atomic);
@@ -2514,6 +2525,7 @@ static size_t __iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
struct scatterlist *sg, unsigned int nents, int prot,
gfp_t gfp)
{
+ const struct iommu_ops *ops = domain->ops;
size_t len = 0, mapped = 0;
phys_addr_t start;
unsigned int i = 0;
@@ -2544,6 +2556,8 @@ static size_t __iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
sg = sg_next(sg);
}
+ if (ops->iotlb_sync_map)
+ ops->iotlb_sync_map(domain);
return mapped;
out_err:
--
2.18.0
next prev parent reply other threads:[~2020-11-19 6:19 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-19 6:18 [PATCH v2 0/6] MediaTek IOMMU improve tlb flush performance in map/unmap Yong Wu
2020-11-19 6:18 ` Yong Wu [this message]
2020-11-25 16:37 ` [PATCH v2 1/6] iommu: Move iotlb_sync_map out from __iommu_map Robin Murphy
2020-11-19 6:18 ` [PATCH v2 2/6] iommu: Add iova and size as parameters in iommu_iotlb_map Yong Wu
2020-11-25 16:38 ` Robin Murphy
2020-11-19 6:18 ` [PATCH v2 3/6] iommu/mediatek: Add iotlb_sync_map to sync whole the iova range Yong Wu
2020-11-19 15:33 ` kernel test robot
2020-11-19 16:11 ` kernel test robot
2020-11-25 16:38 ` Robin Murphy
2020-11-19 6:18 ` [PATCH v2 4/6] iommu: Add granule_ignore when tlb gather Yong Wu
2020-11-25 16:38 ` Robin Murphy
2020-11-19 6:18 ` [PATCH v2 5/6] iommu/mediatek: Enable granule_ignore for unmap Yong Wu
2020-11-19 6:18 ` [PATCH v2 6/6] iommu/mediatek: Convert tlb_flush_walk to gather_add_page Yong Wu
2020-11-25 16:38 ` Robin Murphy
2020-11-25 12:27 ` [PATCH v2 0/6] MediaTek IOMMU improve tlb flush performance in map/unmap Will Deacon
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