iommu/dma: Squash __iommu_dma_{map,unmap}_page helpers

The remaining internal callsites don't care about having prototypes
compatible with the relevant dma_map_ops callbacks, so the extra
level of indirection just wastes space and complictaes things.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

drivers/iommu/dma-iommu.c

@@ -717,18 +717,6 @@ static void iommu_dma_sync_sg_for_device(struct device *dev,
 		arch_sync_dma_for_device(dev, sg_phys(sg), sg->length, dir);
 }
 
-static dma_addr_t __iommu_dma_map_page(struct device *dev, struct page *page,
-		unsigned long offset, size_t size, int prot)
-{
-	return __iommu_dma_map(dev, page_to_phys(page) + offset, size, prot);
-}
-
-static void __iommu_dma_unmap_page(struct device *dev, dma_addr_t handle,
-		size_t size, enum dma_data_direction dir, unsigned long attrs)
-{
-	__iommu_dma_unmap(dev, handle, size);
-}
-
 static dma_addr_t iommu_dma_map_page(struct device *dev, struct page *page,
 		unsigned long offset, size_t size, enum dma_data_direction dir,
 		unsigned long attrs)
@@ -974,7 +962,8 @@ static void *iommu_dma_alloc(struct device *dev, size_t size,
 		if (!addr)
 			return NULL;
 
-		*handle = __iommu_dma_map_page(dev, page, 0, iosize, ioprot);
+		*handle = __iommu_dma_map(dev, page_to_phys(page), iosize,
+					  ioprot);
 		if (*handle == DMA_MAPPING_ERROR) {
 			if (coherent)
 				__free_pages(page, get_order(size));
@@ -991,7 +980,7 @@ static void *iommu_dma_alloc(struct device *dev, size_t size,
 		if (!page)
 			return NULL;
 
-		*handle = __iommu_dma_map_page(dev, page, 0, iosize, ioprot);
+		*handle = __iommu_dma_map(dev, page_to_phys(page), iosize, ioprot);
 		if (*handle == DMA_MAPPING_ERROR) {
 			dma_release_from_contiguous(dev, page,
 						    size >> PAGE_SHIFT);
@@ -1005,7 +994,7 @@ static void *iommu_dma_alloc(struct device *dev, size_t size,
 				arch_dma_prep_coherent(page, iosize);
 			memset(addr, 0, size);
 		} else {
-			__iommu_dma_unmap_page(dev, *handle, iosize, 0, attrs);
+			__iommu_dma_unmap(dev, *handle, iosize);
 			dma_release_from_contiguous(dev, page,
 						    size >> PAGE_SHIFT);
 		}
@@ -1044,12 +1033,12 @@ static void iommu_dma_free(struct device *dev, size_t size, void *cpu_addr,
 	 * Hence how dodgy the below logic looks...
 	 */
 	if (dma_in_atomic_pool(cpu_addr, size)) {
-		__iommu_dma_unmap_page(dev, handle, iosize, 0, 0);
+		__iommu_dma_unmap(dev, handle, iosize);
 		dma_free_from_pool(cpu_addr, size);
 	} else if (attrs & DMA_ATTR_FORCE_CONTIGUOUS) {
 		struct page *page = vmalloc_to_page(cpu_addr);
 
-		__iommu_dma_unmap_page(dev, handle, iosize, 0, attrs);
+		__iommu_dma_unmap(dev, handle, iosize);
 		dma_release_from_contiguous(dev, page, size >> PAGE_SHIFT);
 		dma_common_free_remap(cpu_addr, size, VM_USERMAP);
 	} else if (is_vmalloc_addr(cpu_addr)){
@@ -1060,7 +1049,7 @@ static void iommu_dma_free(struct device *dev, size_t size, void *cpu_addr,
 		__iommu_dma_free(dev, area->pages, iosize, &handle);
 		dma_common_free_remap(cpu_addr, size, VM_USERMAP);
 	} else {
-		__iommu_dma_unmap_page(dev, handle, iosize, 0, 0);
+		__iommu_dma_unmap(dev, handle, iosize);
 		__free_pages(virt_to_page(cpu_addr), get_order(size));
 	}
 }