From: Robin Murphy <robin.murphy@arm.com>
To: Yong Wu <yong.wu@mediatek.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
Joerg Roedel <joro@8bytes.org>, Will Deacon <will.deacon@arm.com>
Cc: youlin.pei@mediatek.com, anan.sun@mediatek.com,
Nicolas Boichat <drinkcat@chromium.org>,
cui.zhang@mediatek.com, srv_heupstream@mediatek.com,
chao.hao@mediatek.com, edison.hsieh@mediatek.com,
linux-kernel@vger.kernel.org, Evan Green <evgreen@chromium.org>,
Tomasz Figa <tfiga@google.com>,
iommu@lists.linux-foundation.org,
linux-mediatek@lists.infradead.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v3 4/7] iommu/mediatek: Delete the leaf in the tlb flush
Date: Mon, 14 Oct 2019 15:22:48 +0100 [thread overview]
Message-ID: <20c74c20-864e-88af-3c58-ad3bb7600bcc@arm.com> (raw)
In-Reply-To: <1571035101-4213-5-git-send-email-yong.wu@mediatek.com>
On 14/10/2019 07:38, Yong Wu wrote:
> In our tlb range flush, we don't care the "leaf". Remove it to simplify
> the code. no functional change.
Presumably you don't care about the granule either?
Robin.
> Signed-off-by: Yong Wu <yong.wu@mediatek.com>
> ---
> drivers/iommu/mtk_iommu.c | 16 ++++------------
> 1 file changed, 4 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
> index 8712afc..19f936c 100644
> --- a/drivers/iommu/mtk_iommu.c
> +++ b/drivers/iommu/mtk_iommu.c
> @@ -174,8 +174,7 @@ static void mtk_iommu_tlb_flush_all(void *cookie)
> }
>
> static void mtk_iommu_tlb_add_flush_nosync(unsigned long iova, size_t size,
> - size_t granule, bool leaf,
> - void *cookie)
> + size_t granule, void *cookie)
> {
> struct mtk_iommu_data *data = cookie;
>
> @@ -219,14 +218,7 @@ static void mtk_iommu_tlb_sync(void *cookie)
> static void mtk_iommu_tlb_flush_walk(unsigned long iova, size_t size,
> size_t granule, void *cookie)
> {
> - mtk_iommu_tlb_add_flush_nosync(iova, size, granule, false, cookie);
> - mtk_iommu_tlb_sync(cookie);
> -}
> -
> -static void mtk_iommu_tlb_flush_leaf(unsigned long iova, size_t size,
> - size_t granule, void *cookie)
> -{
> - mtk_iommu_tlb_add_flush_nosync(iova, size, granule, true, cookie);
> + mtk_iommu_tlb_add_flush_nosync(iova, size, granule, cookie);
> mtk_iommu_tlb_sync(cookie);
> }
>
> @@ -245,7 +237,7 @@ static void mtk_iommu_tlb_flush_page_nosync(struct iommu_iotlb_gather *gather,
> static const struct iommu_flush_ops mtk_iommu_flush_ops = {
> .tlb_flush_all = mtk_iommu_tlb_flush_all,
> .tlb_flush_walk = mtk_iommu_tlb_flush_walk,
> - .tlb_flush_leaf = mtk_iommu_tlb_flush_leaf,
> + .tlb_flush_leaf = mtk_iommu_tlb_flush_walk,
> .tlb_add_page = mtk_iommu_tlb_flush_page_nosync,
> };
>
> @@ -475,7 +467,7 @@ static void mtk_iommu_iotlb_sync(struct iommu_domain *domain,
> spin_lock_irqsave(&dom->pgtlock, flags);
>
> mtk_iommu_tlb_add_flush_nosync(gather->start, length, gather->pgsize,
> - false, data);
> + data);
> mtk_iommu_tlb_sync(data);
>
> if (!is_in_gather)
>
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next prev parent reply other threads:[~2019-10-14 14:44 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-14 6:38 [PATCH v3 0/7] Improve tlb range flush Yong Wu
2019-10-14 6:38 ` [PATCH v3 1/7] iommu/mediatek: Correct the flush_iotlb_all callback Yong Wu
2019-10-14 14:06 ` Robin Murphy
2019-10-14 6:38 ` [PATCH v3 2/7] iommu/mediatek: Add pgtlock in the iotlb_sync Yong Wu
2019-10-14 6:38 ` [PATCH v3 3/7] iommu/mediatek: Use gather to achieve the tlb range flush Yong Wu
2019-10-14 14:21 ` Robin Murphy
2019-10-15 5:26 ` Yong Wu
2019-10-15 11:38 ` Robin Murphy
2019-10-14 6:38 ` [PATCH v3 4/7] iommu/mediatek: Delete the leaf in the tlb flush Yong Wu
2019-10-14 14:22 ` Robin Murphy [this message]
2019-10-15 5:25 ` Yong Wu
2019-10-15 11:24 ` Robin Murphy
2019-10-14 6:38 ` [PATCH v3 5/7] iommu/mediatek: Move the tlb_sync into tlb_flush Yong Wu
2019-10-14 6:38 ` [PATCH v3 6/7] iommu/mediatek: Use writel for TLB range invalidation Yong Wu
2019-10-14 14:04 ` Robin Murphy
2019-10-15 5:25 ` Yong Wu
2019-10-14 6:38 ` [PATCH v3 7/7] iommu/mediatek: Reduce the tlb flush timeout value Yong Wu
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