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Commit 772f99e5 authored by Patrick Daly's avatar Patrick Daly
Browse files

iommu: arm-smmu: Allow setting attributes on default domain 



Allow the arm-smmu driver to set attributes on the default domain
during arm_smmu_attach_dev.

Change-Id: I3072858be8885615a0842dad782df876607bc531
Signed-off-by: default avatarPatrick Daly <pdaly@codeaurora.org>
parent 58723a1e

drivers/iommu/arm-smmu.c

+31 −12
Original line number Diff line number Diff line
@@ -3074,9 +3074,6 @@ static int arm_smmu_domain_get_attr(struct iommu_domain *domain, 
	struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);

	int ret = 0;



	if (domain->type != IOMMU_DOMAIN_UNMANAGED)

		return -EINVAL;



	mutex_lock(&smmu_domain->init_mutex);

	switch (attr) {

	case DOMAIN_ATTR_NESTING:
@@ -3216,22 +3213,19 @@ static int arm_smmu_domain_get_attr(struct iommu_domain *domain, 
	return ret;

}



static int arm_smmu_domain_set_attr(struct iommu_domain *domain,

static int __arm_smmu_domain_set_attr2(struct iommu_domain *domain,

				    enum iommu_attr attr, void *data);

static int __arm_smmu_domain_set_attr(struct iommu_domain *domain,

				    enum iommu_attr attr, void *data)

{

	int ret = 0;

	struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);



	if (domain->type != IOMMU_DOMAIN_UNMANAGED)

		return -EINVAL;



	mutex_lock(&smmu_domain->init_mutex);



	switch (attr) {

	case DOMAIN_ATTR_NESTING:

		if (smmu_domain->smmu) {

			ret = -EPERM;

			goto out_unlock;

			goto out;

		}



		if (*(int *)data)
@@ -3347,6 +3341,21 @@ static int arm_smmu_domain_set_attr(struct iommu_domain *domain, 
		}

		ret = 0;

		break;

	default:

		ret = __arm_smmu_domain_set_attr2(domain, attr, data);

	}

out:

	return ret;

}



/* yeee-haw */

static int __arm_smmu_domain_set_attr2(struct iommu_domain *domain,

				    enum iommu_attr attr, void *data)

{

	struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);

	int ret = 0;



	switch (attr) {

	case DOMAIN_ATTR_USE_UPSTREAM_HINT:

	case DOMAIN_ATTR_USE_LLC_NWA:

		/* can't be changed while attached */
@@ -3409,11 +3418,21 @@ static int arm_smmu_domain_set_attr(struct iommu_domain *domain, 
		ret = -ENODEV;

	}



out_unlock:

	mutex_unlock(&smmu_domain->init_mutex);

	return ret;

}



static int arm_smmu_domain_set_attr(struct iommu_domain *domain,

				    enum iommu_attr attr, void *data)

{

	struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);

	int ret;



	mutex_lock(&smmu_domain->init_mutex);

	ret = __arm_smmu_domain_set_attr(domain, attr, data);

	mutex_unlock(&smmu_domain->init_mutex);



	return ret;

}

static int arm_smmu_of_xlate(struct device *dev, struct of_phandle_args *args)

{

	u32 mask, fwid = 0;