From: Yong Wu <yong.wu@mediatek.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
"Robin Murphy" <robin.murphy@arm.com>, <youlin.pei@mediatek.com>,
<anan.sun@mediatek.com>, Nicolas Boichat <drinkcat@chromium.org>,
<srv_heupstream@mediatek.com>, <chao.hao@mediatek.com>,
<linux-kernel@vger.kernel.org>,
Krzysztof Kozlowski <krzk@kernel.org>,
"Tomasz Figa" <tfiga@google.com>,
<iommu@lists.linux-foundation.org>,
<linux-mediatek@lists.infradead.org>,
Matthias Brugger <matthias.bgg@gmail.com>,
Greg Kroah-Hartman <gregkh@google.com>, <kernel-team@android.com>,
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v3 1/7] iommu: Move iotlb_sync_map out from __iommu_map
Date: Thu, 24 Dec 2020 19:27:37 +0800 [thread overview]
Message-ID: <1608809257.26323.259.camel@mhfsdcap03> (raw)
In-Reply-To: <20201223085153.GA30643@infradead.org>
On Wed, 2020-12-23 at 08:51 +0000, Christoph Hellwig wrote:
> On Wed, Dec 16, 2020 at 06:36:01PM +0800, Yong Wu wrote:
> > 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>
> > Reviewed-by: Robin Murphy <robin.murphy@arm.com>
>
> What about adding a little helper that does the NULL check and method
> call instead of duplicating it all over?
Thanks for the review. Of course OK.
Then the code like below.
(If the helper name "_iommu_map" is not good, please tell me.)
+static int _iommu_map(struct iommu_domain *domain, unsigned long iova,
+ phys_addr_t paddr, size_t size, int prot, gfp_t gfp)
+{
+ const struct iommu_ops *ops = domain->ops;
+ int ret;
+
+ ret = __iommu_map(domain, iova, paddr, size, prot, gfp);
+ if (ret == 0 && ops->iotlb_sync_map)
+ ops->iotlb_sync_map(domain);
+ return ret;
+}
+
int iommu_map(struct iommu_domain *domain, unsigned long iova,
phys_addr_t paddr, size_t size, int prot)
{
might_sleep();
- return __iommu_map(domain, iova, paddr, size, prot, GFP_KERNEL);
+ return _iommu_map(domain, iova, paddr, size, prot, GFP_KERNEL);
}
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);
+ return _iommu_map(domain, iova, paddr, size, prot, GFP_ATOMIC);
}
EXPORT_SYMBOL_GPL(iommu_map_atomic);
next prev parent reply other threads:[~2020-12-24 11:28 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-16 10:36 [PATCH v3 0/7] MediaTek IOMMU improve tlb flush performance in map/unmap Yong Wu
2020-12-16 10:36 ` [PATCH v3 1/7] iommu: Move iotlb_sync_map out from __iommu_map Yong Wu
2020-12-23 8:51 ` Christoph Hellwig
2020-12-24 11:27 ` Yong Wu [this message]
2020-12-16 10:36 ` [PATCH v3 2/7] iommu: Add iova and size as parameters in iotlb_sync_map Yong Wu
2020-12-16 10:36 ` [PATCH v3 3/7] iommu/mediatek: Add iotlb_sync_map to sync whole the iova range Yong Wu
2020-12-16 10:36 ` [PATCH v3 4/7] iommu: Switch gather->end to unsigned long long Yong Wu
2020-12-16 11:03 ` David Laight
2020-12-17 2:26 ` Yong Wu
2020-12-16 12:10 ` Robin Murphy
2020-12-17 2:26 ` Yong Wu
2020-12-16 10:36 ` [PATCH v3 5/7] iommu: Allow io_pgtable_tlb ops optional Yong Wu
2021-01-18 16:18 ` Robin Murphy
2020-12-16 10:36 ` [PATCH v3 6/7] iommu/mediatek: Gather iova in iommu_unmap to achieve tlb sync once Yong Wu
2020-12-23 8:56 ` Tomasz Figa
2020-12-23 11:00 ` Robin Murphy
2021-01-08 9:56 ` Tomasz Figa
2021-01-08 9:56 ` Tomasz Figa
2021-01-18 16:35 ` Robin Murphy
2021-01-18 16:58 ` Will Deacon
2021-01-18 17:14 ` Robin Murphy
2020-12-16 10:36 ` [PATCH v3 7/7] iommu/mediatek: Remove the tlb-ops for v7s Yong Wu
2021-01-18 16:39 ` Robin Murphy
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