[PATCH v2 08/29] iommu/mediatek: Remove for_each_m4u in tlb_sync_all
From: Yong Wu <yong.wu@mediatek.com>
Date: 2021-08-13 06:54:50
Also in:
linux-arm-kernel, linux-devicetree, linux-iommu, lkml
Subsystem:
iommu subsystem, mediatek iommu driver, the rest · Maintainers:
Joerg Roedel, Will Deacon, Yong Wu, Linus Torvalds
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: some 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@mediatek.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 175065b76509..1e18fff76e61 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c@@ -207,19 +207,15 @@ 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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