[PATCH v2 2/3] iommu/arm-smmu-v3: Make the blocked domain support PASID

[Yi Liu <yi.l.liu@intel.com>]

From: Jason Gunthorpe <jgg@nvidia.com>

The blocked domain is used to park RID to be blocking DMA state. This
can be extended to PASID as well. By this, the remove_dev_pasid() op
of ARM SMMUv3 can be dropped.

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
---
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index f70165f544df..ae68c7b7fcd5 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -2961,13 +2961,12 @@ int arm_smmu_set_pasid(struct arm_smmu_master *master,
 	return ret;
 }
 
-static void arm_smmu_remove_dev_pasid(struct device *dev, ioasid_t pasid,
-				      struct iommu_domain *domain)
+static int arm_smmu_blocking_set_dev_pasid(struct iommu_domain *new_domain,
+					   struct device *dev, ioasid_t pasid,
+					   struct iommu_domain *old_domain)
 {
+	struct arm_smmu_domain *smmu_domain = to_smmu_domain(old_domain);
 	struct arm_smmu_master *master = dev_iommu_priv_get(dev);
-	struct arm_smmu_domain *smmu_domain;
-
-	smmu_domain = to_smmu_domain(domain);
 
 	mutex_lock(&arm_smmu_asid_lock);
 	arm_smmu_clear_cd(master, pasid);
@@ -2988,6 +2987,7 @@ static void arm_smmu_remove_dev_pasid(struct device *dev, ioasid_t pasid,
 		    sid_domain->type == IOMMU_DOMAIN_BLOCKED)
 			sid_domain->ops->attach_dev(sid_domain, dev);
 	}
+	return 0;
 }
 
 static void arm_smmu_attach_dev_ste(struct iommu_domain *domain,
@@ -3069,6 +3069,7 @@ static int arm_smmu_attach_dev_blocked(struct iommu_domain *domain,
 
 static const struct iommu_domain_ops arm_smmu_blocked_ops = {
 	.attach_dev = arm_smmu_attach_dev_blocked,
+	.set_dev_pasid = arm_smmu_blocking_set_dev_pasid,
 };
 
 static struct iommu_domain arm_smmu_blocked_domain = {
@@ -3497,7 +3498,6 @@ static struct iommu_ops arm_smmu_ops = {
 	.device_group		= arm_smmu_device_group,
 	.of_xlate		= arm_smmu_of_xlate,
 	.get_resv_regions	= arm_smmu_get_resv_regions,
-	.remove_dev_pasid	= arm_smmu_remove_dev_pasid,
 	.dev_enable_feat	= arm_smmu_dev_enable_feature,
 	.dev_disable_feat	= arm_smmu_dev_disable_feature,
 	.page_response		= arm_smmu_page_response,
-- 
2.34.1