iommu/arm-smmu-v3: Implement the unmap_pages() IOMMU driver callback

Implement the unmap_pages() callback for ARM SMMUV3 driver to allow calls
from iommu_unmap to unmap multiple pages of the same size in one call.
Also remove the unmap() callback for the ARM SMMUV3 driver as it will
no longer be used.
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/1627697831-158822-2-git-send-email-chenxiang66@hisilicon.comSigned-off-by: Joerg Roedel <jroedel@suse.de>

drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c

@@ -2450,8 +2450,9 @@ static int arm_smmu_map(struct iommu_domain *domain, unsigned long iova,
 	return ops->map(ops, iova, paddr, size, prot, gfp);
 }
 
-static size_t arm_smmu_unmap(struct iommu_domain *domain, unsigned long iova,
-			     size_t size, struct iommu_iotlb_gather *gather)
+static size_t arm_smmu_unmap_pages(struct iommu_domain *domain, unsigned long iova,
+				   size_t pgsize, size_t pgcount,
+				   struct iommu_iotlb_gather *gather)
 {
 	struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
 	struct io_pgtable_ops *ops = smmu_domain->pgtbl_ops;
@@ -2459,7 +2460,7 @@ static size_t arm_smmu_unmap(struct iommu_domain *domain, unsigned long iova,
 	if (!ops)
 		return 0;
 
-	return ops->unmap(ops, iova, size, gather);
+	return ops->unmap_pages(ops, iova, pgsize, pgcount, gather);
 }
 
 static void arm_smmu_flush_iotlb_all(struct iommu_domain *domain)
@@ -2823,7 +2824,7 @@ static struct iommu_ops arm_smmu_ops = {
 	.domain_free		= arm_smmu_domain_free,
 	.attach_dev		= arm_smmu_attach_dev,
 	.map			= arm_smmu_map,
-	.unmap			= arm_smmu_unmap,
+	.unmap_pages		= arm_smmu_unmap_pages,
 	.flush_iotlb_all	= arm_smmu_flush_iotlb_all,
 	.iotlb_sync		= arm_smmu_iotlb_sync,
 	.iova_to_phys		= arm_smmu_iova_to_phys,