diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/iommu/exynos-iommu.c | 32 |
1 files changed, 27 insertions, 5 deletions
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 4ff4b0b81575..06fc70ee4389 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -226,9 +226,14 @@ static void __sysmmu_tlb_invalidate(void __iomem *sfrbase) } static void __sysmmu_tlb_invalidate_entry(void __iomem *sfrbase, - unsigned long iova) + unsigned long iova, unsigned int num_inv) { - __raw_writel((iova & SPAGE_MASK) | 1, sfrbase + REG_MMU_FLUSH_ENTRY); + unsigned int i; + for (i = 0; i < num_inv; i++) { + __raw_writel((iova & SPAGE_MASK) | 1, + sfrbase + REG_MMU_FLUSH_ENTRY); + iova += SPAGE_SIZE; + } } static void __sysmmu_set_ptbase(void __iomem *sfrbase, @@ -452,7 +457,8 @@ static bool exynos_sysmmu_disable(struct device *dev) return disabled; } -static void sysmmu_tlb_invalidate_entry(struct device *dev, unsigned long iova) +static void sysmmu_tlb_invalidate_entry(struct device *dev, unsigned long iova, + size_t size) { unsigned long flags; struct sysmmu_drvdata *data = dev_get_drvdata(dev->archdata.iommu); @@ -460,9 +466,25 @@ static void sysmmu_tlb_invalidate_entry(struct device *dev, unsigned long iova) read_lock_irqsave(&data->lock, flags); if (is_sysmmu_active(data)) { + unsigned int maj; + unsigned int num_inv = 1; + maj = __raw_readl(data->sfrbase + REG_MMU_VERSION); + /* + * L2TLB invalidation required + * 4KB page: 1 invalidation + * 64KB page: 16 invalidation + * 1MB page: 64 invalidation + * because it is set-associative TLB + * with 8-way and 64 sets. + * 1MB page can be cached in one of all sets. + * 64KB page can be one of 16 consecutive sets. + */ + if ((maj >> 28) == 2) /* major version number */ + num_inv = min_t(unsigned int, size / PAGE_SIZE, 64); + if (sysmmu_block(data->sfrbase)) { __sysmmu_tlb_invalidate_entry( - data->sfrbase, iova); + data->sfrbase, iova, num_inv); sysmmu_unblock(data->sfrbase); } } else { @@ -915,7 +937,7 @@ done: spin_lock_irqsave(&priv->lock, flags); list_for_each_entry(data, &priv->clients, node) - sysmmu_tlb_invalidate_entry(data->dev, iova); + sysmmu_tlb_invalidate_entry(data->dev, iova, size); spin_unlock_irqrestore(&priv->lock, flags); return size; |