Commit a7a04ea3 authored by Yong Wu's avatar Yong Wu Committed by Joerg Roedel
Browse files

iommu/mediatek: Use gather to achieve the tlb range flush 



Use the iommu_gather mechanism to achieve the tlb range flush.
Gather the iova range in the "tlb_add_page", then flush the merged iova
range in iotlb_sync.

Suggested-by: default avatarTomasz Figa <tfiga@chromium.org>
Signed-off-by: default avatarYong Wu <yong.wu@mediatek.com>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent da3cc91b

drivers/iommu/mtk_iommu.c

+8 −4
Original line number Diff line number Diff line
@@ -245,11 +245,9 @@ static void mtk_iommu_tlb_flush_page_nosync(struct iommu_iotlb_gather *gather, 
					    void *cookie)

{

	struct mtk_iommu_data *data = cookie;

	unsigned long flags;

	struct iommu_domain *domain = &data->m4u_dom->domain;



	spin_lock_irqsave(&data->tlb_lock, flags);

	mtk_iommu_tlb_add_flush_nosync(iova, granule, granule, true, cookie);

	spin_unlock_irqrestore(&data->tlb_lock, flags);

	iommu_iotlb_gather_add_page(domain, gather, iova, granule);

}



static const struct iommu_flush_ops mtk_iommu_flush_ops = {
@@ -469,9 +467,15 @@ static void mtk_iommu_iotlb_sync(struct iommu_domain *domain, 
				 struct iommu_iotlb_gather *gather)

{

	struct mtk_iommu_data *data = mtk_iommu_get_m4u_data();

	size_t length = gather->end - gather->start;

	unsigned long flags;



	if (gather->start == ULONG_MAX)

		return;



	spin_lock_irqsave(&data->tlb_lock, flags);

	mtk_iommu_tlb_add_flush_nosync(gather->start, length, gather->pgsize,

				       false, data);

	mtk_iommu_tlb_sync(data);

	spin_unlock_irqrestore(&data->tlb_lock, flags);

}

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