iommu/vt-d: Remove domain parameter for intel_pasid_setup_dirty_tracking()

The only usage of input @Domain is to get the domain id (DID) to flush
cache after setting dirty tracking. However, DID can be obtained from
the pasid entry. So no need to pass in domain. This can make this helper
cleaner when adding the missing dirty tracking for the parent domain,
which needs to use the DID of nested domain.

Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Reviewed-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20240208082307.15759-7-yi.l.liu@intel.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

Author: yiliu1765

drivers/iommu/intel/iommu.c

@@ -4741,8 +4741,7 @@ static int intel_iommu_set_dirty_tracking(struct iommu_domain *domain,
 		goto out_unlock;
 
 	list_for_each_entry(info, &dmar_domain->devices, link) {
-		ret = intel_pasid_setup_dirty_tracking(info->iommu,
-						       info->domain, info->dev,
+		ret = intel_pasid_setup_dirty_tracking(info->iommu, info->dev,
 						       IOMMU_NO_PASID, enable);
 		if (ret)
 			goto err_unwind;
@@ -4756,8 +4755,8 @@ static int intel_iommu_set_dirty_tracking(struct iommu_domain *domain,
 
 err_unwind:
 	list_for_each_entry(info, &dmar_domain->devices, link)
-		intel_pasid_setup_dirty_tracking(info->iommu, dmar_domain,
-						 info->dev, IOMMU_NO_PASID,
+		intel_pasid_setup_dirty_tracking(info->iommu, info->dev,
+						 IOMMU_NO_PASID,
 						 dmar_domain->dirty_tracking);
 	spin_unlock(&dmar_domain->lock);
 	return ret;

drivers/iommu/intel/pasid.c

@@ -428,7 +428,6 @@ int intel_pasid_setup_second_level(struct intel_iommu *iommu,
  * Set up dirty tracking on a second only or nested translation type.
  */
 int intel_pasid_setup_dirty_tracking(struct intel_iommu *iommu,
-				     struct dmar_domain *domain,
 				     struct device *dev, u32 pasid,
 				     bool enabled)
 {
@@ -445,7 +444,7 @@ int intel_pasid_setup_dirty_tracking(struct intel_iommu *iommu,
 		return -ENODEV;
 	}
 
-	did = domain_id_iommu(domain, iommu);
+	did = pasid_get_domain_id(pte);
 	pgtt = pasid_pte_get_pgtt(pte);
 	if (pgtt != PASID_ENTRY_PGTT_SL_ONLY &&
 	    pgtt != PASID_ENTRY_PGTT_NESTED) {

drivers/iommu/intel/pasid.h

@@ -307,7 +307,6 @@ int intel_pasid_setup_second_level(struct intel_iommu *iommu,
 				   struct dmar_domain *domain,
 				   struct device *dev, u32 pasid);
 int intel_pasid_setup_dirty_tracking(struct intel_iommu *iommu,
-				     struct dmar_domain *domain,
 				     struct device *dev, u32 pasid,
 				     bool enabled);
 int intel_pasid_setup_pass_through(struct intel_iommu *iommu,