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

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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: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Yong Wu 2019-11-04 15:01:04 +08:00 committed by Joerg Roedel
parent da3cc91b8d
commit a7a04ea34e
1 changed files with 8 additions and 4 deletions
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12
drivers/iommu/mtk_iommu.c
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@ -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);
}