From: Robin Murphy <robin.murphy@arm.com>
To: Yong Wu <yong.wu@mediatek.com>, Joerg Roedel <joro@8bytes.org>,
Will Deacon <will@kernel.org>
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, youlin.pei@mediatek.com,
Nicolas Boichat <drinkcat@chromium.org>,
anan.sun@mediatek.com, chao.hao@mediatek.com,
jun.wen@mediatek.com
Subject: Re: [PATCH v2 3/6] iommu/mediatek: Add iotlb_sync_map to sync whole the iova range
Date: Wed, 25 Nov 2020 16:38:21 +0000 [thread overview]
Message-ID: <751e08a1-d3c3-29f9-5c62-560370ac0703@arm.com> (raw)
In-Reply-To: <20201119061836.15238-4-yong.wu@mediatek.com>
On 2020-11-19 06:18, Yong Wu wrote:
> Remove IO_PGTABLE_QUIRK_TLBI_ON_MAP to avoid tlb sync for each a small
> chunk memory, Use the new iotlb_sync_map to tlb_sync once for whole the
> iova range of iommu_map.
>
> Signed-off-by: Yong Wu <yong.wu@mediatek.com>
> ---
> After reading msm_iommu.c, It looks IO_PGTABLE_QUIRK_TLBI_ON_MAP can be
> removed.
> ---
> drivers/iommu/mtk_iommu.c | 10 +++++++++-
> 1 file changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
> index c072cee532c2..8c2d4a225666 100644
> --- a/drivers/iommu/mtk_iommu.c
> +++ b/drivers/iommu/mtk_iommu.c
> @@ -323,7 +323,6 @@ static int mtk_iommu_domain_finalise(struct mtk_iommu_domain *dom)
> dom->cfg = (struct io_pgtable_cfg) {
> .quirks = IO_PGTABLE_QUIRK_ARM_NS |
> IO_PGTABLE_QUIRK_NO_PERMS |
> - IO_PGTABLE_QUIRK_TLBI_ON_MAP |
> IO_PGTABLE_QUIRK_ARM_MTK_EXT,
> .pgsize_bitmap = mtk_iommu_ops.pgsize_bitmap,
> .ias = 32,
> @@ -454,6 +453,14 @@ static void mtk_iommu_iotlb_sync(struct iommu_domain *domain,
> data);
> }
>
> +static void mtk_iommu_sync_map(struct iommu_domain *domain, unsigned long iova,
> + size_t size)
> +{
> + struct mtk_iommu_domain *dom = to_mtk_domain(domain);
> +
> + mtk_iommu_tlb_flush_range_sync(iova, size, size, dom->data);
So we have a conflict/dependency against the MT8192 series here - I
guess we need to make a decision up-front about which series should go
first. Other than that, though:
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
> +}
> +
> static phys_addr_t mtk_iommu_iova_to_phys(struct iommu_domain *domain,
> dma_addr_t iova)
> {
> @@ -540,6 +547,7 @@ static const struct iommu_ops mtk_iommu_ops = {
> .unmap = mtk_iommu_unmap,
> .flush_iotlb_all = mtk_iommu_flush_iotlb_all,
> .iotlb_sync = mtk_iommu_iotlb_sync,
> + .iotlb_sync_map = mtk_iommu_sync_map,
> .iova_to_phys = mtk_iommu_iova_to_phys,
> .probe_device = mtk_iommu_probe_device,
> .release_device = mtk_iommu_release_device,
>
next prev parent reply other threads:[~2020-11-25 16:38 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 ` [PATCH v2 1/6] iommu: Move iotlb_sync_map out from __iommu_map Yong Wu
2020-11-25 16:37 ` 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 [this message]
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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