iommu/arm-smmu: Convert to iommu_capable() API function

Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

1 files changed, 9 insertions, 10 deletions

diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index a83cc2a2a2ca..1e0485e0aa6a 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -1526,20 +1526,19 @@ static phys_addr_t arm_smmu_iova_to_phys(struct iommu_domain *domain,
         return __pfn_to_phys(pte_pfn(pte)) | (iova & ~PAGE_MASK);
 }
 
-static int arm_smmu_domain_has_cap(struct iommu_domain *domain,
-                                   unsigned long cap)
+static bool arm_smmu_capable(enum iommu_cap cap)
 {
-        struct arm_smmu_domain *smmu_domain = domain->priv;
-        struct arm_smmu_device *smmu = smmu_domain->smmu;
-        u32 features = smmu ? smmu->features : 0;
-
         switch (cap) {
         case IOMMU_CAP_CACHE_COHERENCY:
-                return features & ARM_SMMU_FEAT_COHERENT_WALK;
+                /*
+                 * Return true here as the SMMU can always send out coherent
+                 * requests.
+                 */
+                return true;
         case IOMMU_CAP_INTR_REMAP:
-                return 1; /* MSIs are just memory writes */
+                return true; /* MSIs are just memory writes */
         default:
-                return 0;
+                return false;
         }
 }
 
@@ -1609,6 +1608,7 @@ static void arm_smmu_remove_device(struct device *dev)
 }
 
 static const struct iommu_ops arm_smmu_ops = {
+        .capable        = arm_smmu_capable,
         .domain_init    = arm_smmu_domain_init,
         .domain_destroy = arm_smmu_domain_destroy,
         .attach_dev     = arm_smmu_attach_dev,
@@ -1616,7 +1616,6 @@ static const struct iommu_ops arm_smmu_ops = {
         .map            = arm_smmu_map,
         .unmap          = arm_smmu_unmap,
         .iova_to_phys   = arm_smmu_iova_to_phys,
-        .domain_has_cap = arm_smmu_domain_has_cap,
         .add_device     = arm_smmu_add_device,
         .remove_device  = arm_smmu_remove_device,
         .pgsize_bitmap  = (SECTION_SIZE |