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Date: Thu, 23 Sep 2021 19:58:16 +0800 From: Yong Wu <yong.wu@...iatek.com> To: Joerg Roedel <joro@...tes.org>, Rob Herring <robh+dt@...nel.org>, Matthias Brugger <matthias.bgg@...il.com>, Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com> CC: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>, Tomasz Figa <tfiga@...omium.org>, <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>, Hsin-Yi Wang <hsinyi@...omium.org>, <yong.wu@...iatek.com>, <youlin.pei@...iatek.com>, <anan.sun@...iatek.com>, <chao.hao@...iatek.com>, <yen-chang.chen@...iatek.com> Subject: [PATCH v3 09/33] iommu/mediatek: Remove for_each_m4u in tlb_sync_all The tlb_sync_all is called from these three functions: a) flush_iotlb_all: it will be called for each a iommu HW. b) tlb_flush_range_sync: it already has for_each_m4u. c) in irq: When IOMMU HW translation fault, Only need flush itself. Thus, No need for_each_m4u in this tlb_sync_all. Remove it. Signed-off-by: Yong Wu <yong.wu@...iatek.com> --- drivers/iommu/mtk_iommu.c | 18 +++++++----------- 1 file changed, 7 insertions(+), 11 deletions(-) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 6f4f6624e3ac..0b4c30baa864 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -206,19 +206,15 @@ static struct mtk_iommu_domain *to_mtk_domain(struct iommu_domain *dom) static void mtk_iommu_tlb_flush_all(struct mtk_iommu_data *data) { - struct list_head *head = data->hw_list; - - for_each_m4u(data, head) { - if (pm_runtime_get_if_in_use(data->dev) <= 0) - continue; + if (pm_runtime_get_if_in_use(data->dev) <= 0) + return; - writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0, - data->base + data->plat_data->inv_sel_reg); - writel_relaxed(F_ALL_INVLD, data->base + REG_MMU_INVALIDATE); - wmb(); /* Make sure the tlb flush all done */ + writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0, + data->base + data->plat_data->inv_sel_reg); + writel_relaxed(F_ALL_INVLD, data->base + REG_MMU_INVALIDATE); + wmb(); /* Make sure the tlb flush all done */ - pm_runtime_put(data->dev); - } + pm_runtime_put(data->dev); } static void mtk_iommu_tlb_flush_range_sync(unsigned long iova, size_t size, -- 2.18.0
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