Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 3ba41cfc authored by Liam Mark's avatar Liam Mark Committed by Patrick Daly
Browse files

iommu/arm-smmu: support querying IOVA coherency 



Support querying whether an IOVA is mapped as coherent.

Change-Id: I7dee5c80783ebc4449eb096ed603f36d8b0636ee
Signed-off-by: default avatarLiam Mark <lmark@codeaurora.org>
Signed-off-by: default avatarPatrick Daly <pdaly@codeaurora.org>
parent 5bb64228

drivers/iommu/arm-smmu.c

+18 −0
Original line number Diff line number Diff line
@@ -2786,6 +2786,23 @@ static int arm_smmu_enable_s1_translations(struct arm_smmu_domain *smmu_domain) 
	return ret;

}



static bool arm_smmu_is_iova_coherent(struct iommu_domain *domain,

					 dma_addr_t iova)

{

	bool ret;

	unsigned long flags;

	struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);

	struct io_pgtable_ops *ops = smmu_domain->pgtbl_ops;



	if (!ops)

		return false;



	spin_lock_irqsave(&smmu_domain->pgtbl_lock, flags);

	ret = ops->is_iova_coherent(ops, iova);

	spin_unlock_irqrestore(&smmu_domain->pgtbl_lock, flags);

	return ret;

}



static void arm_smmu_trigger_fault(struct iommu_domain *domain,

					unsigned long flags)

{
@@ -2915,6 +2932,7 @@ static struct iommu_ops arm_smmu_ops = { 
	.tlbi_domain		= arm_smmu_tlbi_domain,

	.enable_config_clocks	= arm_smmu_enable_config_clocks,

	.disable_config_clocks	= arm_smmu_disable_config_clocks,

	.is_iova_coherent	= arm_smmu_is_iova_coherent,

};



#define IMPL_DEF1_MICRO_MMU_CTRL	0